May 2002 - openSUSE Security - openSUSE Mailing Lists

Re: [suse-security] SuSE YOU scheduling
by mario libraro 08 May '02

08 May '02

> I wrote fou4s ( http://www.gaugusch.at/fou4s ) _exactly_ because of this > problem. > Maybe there IS a solution with YOU, but I don't think so. > > check it out ... > Markus oh nice.. really.. this is not what i were looking for but it perfectly solves my problem :)

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Virtual network cards
by Kim L. Christensen 08 May '02

08 May '02

Hello list, Is it possible to create more than 4 different ip addresses for 1 network card.? looking in the rc.config file, there is an example for up to 4 adresses but I would like to know if this is the maximum or not. Regards Kim Christensen

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Yast2 authentication and RPM signature authentication
by Rafael E. Herrera 08 May '02

08 May '02

Hi, I just upgraded to 8.0 from 7.3 and have been experiencing some warnings from Yast2 (although I got the same in 7.3). 1. When launching Yast2 I get: Session management error: Authentication Rejected, reason : None of the authentication protocols specified are supported and host-based authentication failed Why is this message given and how should I configure my system to implement the authentication required? 2. I just got a security announcement and there is a note at the bottom about how to installing suse's signature. I saved the public signature and run the suggested command: # gpg --batch; gpg < announcement.txt | gpg --import gpg: Go ahead and type your message ... something ^D gpg: no valid OpenPGP data found. gpg: processing message failed: eof gpg: Signature made Wed 08 May 2002 05:58:59 AM EDT using RSA key ID 3D25D3D9 gpg: Good signature from "SuSE Security Team <security(a)suse.de>" Could not find a valid trust path to the key. Let's see whether we can assign some missing owner trust values. No path leading to one of our keys found. gpg: WARNING: This key is not certified with a trusted signature! gpg: There is no indication that the signature belongs to the owner. gpg: Fingerprint: 73 5F 2E 99 DF DB 94 C4 8F 5A A3 AE AF 22 F2 D5 gpg: key 9C800ACA: not changed gpg: key 3D25D3D9: not changed gpg: Total number processed: 2 gpg: unchanged: 2 This is hard to interpret, but I gather the key was not fully authenticated. If I run ca checksig using rpm, I get: # rpm -v --checksig shadow-4.0.2-88.i386.rpm shadow-4.0.2-88.i386.rpm: MD5 sum OK: ee8e88db89c24da38498c8612f3cdfb2 gpg: Signature made Thu 25 Apr 2002 01:40:07 PM EDT using DSA key ID 9C800ACA gpg: Good signature from "SuSE Package Signing Key <build(a)suse.de>" gpg: WARNING: This key is not certified with a trusted signature! gpg: There is no indication that the signature belongs to the owner. gpg: Fingerprint: 79C1 79B2 E1C8 20C1 890F 9994 A84E DAE8 9C80 0ACA Again, this does not look good either. How is the suse key installed properly and how do I test that I did it right? Thanks. -- Rafael

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Re: [suse-security] SuSE 8.0 (fwd) - OT
by Markus Gaugusch 08 May '02

08 May '02

Maybe I should have replied to the list ... even if it is off-topic ---------- Forwarded message ---------- Date: Wed, 8 May 2002 14:54:55 +0200 (CEST) From: Markus Gaugusch <markus(a)gaugusch.at> To: Bill Eastman <beastman(a)austin.rr.com> Subject: Re: [suse-security] SuSE 8.0 Try the following (insert first suse cd) mount /cdrom cd /cdrom zgrep locate INDEX.gz if that doesn't work, do zgrep locate ARCHIVES.gz |grep bin I always copy index.gz and archives.gz to my harddrive for convenience. hth, Markus -- _____________________________ /"\ Markus Gaugusch ICQ 11374583 \ / ASCII Ribbon Campaign markus(a)gaugusch.at X Against HTML Mail / \

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SuSE YOU scheduling
by mario libraro 08 May '02

08 May '02

Hi to all listmates, after many many searches in the web i haven't still understood a pretty simple thing: how can I schedule (with crond for example) the execution of Yast Online Update? I think i must execute y2bignfat via crond with some parameter but i haven't found any clear documentation on it. Can someone help me? Mario Libraro

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Failure mode for SuSEfirewall_setup
by Albert Brandl 08 May '02

08 May '02

Hi! When the init script SuSEfirewall_setup fails, it just writes out a red "failed" and terminates. If you boot up your machine in runlevel 5 and do not closely watch the initialization, you don't realize that the firewall has not been set up sucessfully. Since SuSEfirewall_init calls /sbin/SuSEfirewall close, which allows no incoming traffic, this does not open the machine to the "world". But I'm not quite sure if this "failure mode" is the best possible solution. Any opinions? Best regards, Albert Brandl

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RE: [suse-security] Antwort: Re: Re: [suse-security] IPChains and IPTables
by Reckhard, Tobias 08 May '02

08 May '02

> ... if I have to ask google ... > ... why does this mailing-list exist ? ... To answer those questions that Google doesn't answer. > ... thought this mailing-list is to discuss different topics Yeah, I guess general discussion about security is also OK, as long as it doesn't stray too far from SuSE. However, I don't mean questions to which there are simple or unique answers, and instead discussions of opinions. Tobias

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Antwort: Re: Re: [suse-security] IPChains and IPTables
by BLeonhardt＠analytek.de 08 May '02

08 May '02

... if I have to ask google ... ... why does this mailing-list exist ? ... ... thought this mailing-list is to discuss different topics ... and not only for "Firewall-Experts" ... Regards, Bruno Leonhardt Michael Appeldorn An: suse-security(a)suse.com, BLeonhardt(a)analytek.de <appeldorn@codix Kopie: x.de> Thema: Re: Re: [suse-security] IPChains and IPTables 08.05.02 11:37 Bitte antworten an Appeldorn >... now I'm not sure if I did understand that right ... > >.. IP-Chains can analyze if a packet is permitted to "go to the target >system" or not ( if so, the packet will be dropped or routed ) >.. IP-Tables can analyze all packets and Flags ( SYN, FIN, etc. ) no matter >where the packets destination is ( if a rule will apply the packet will be >dropped or routed ) > >.. right so ?!?!??!?!??!?! not really. again ! ask google ! e.g : compare iptables ipchains here the first link in list http://www.oofle.com/iptables/comparison.htm Yours Michael Appeldorn

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SuSE Security Announcement: sysconfig (SuSE-SA:2002:016)
by Sebastian Krahmer 08 May '02

08 May '02

-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SuSE Security Announcement Package: sysconfig Announcement-ID: SuSE-SA:2002:016 Date: Wed May 8 12:00:00 MEST 2002 Affected products: 8.0 Vulnerability Type: remote command execution Severity (1-10): 4 SuSE default package: Yes. Other affected systems: No. Content of this advisory: 1) security vulnerability resolved: Quotation problem in ifup-dhcp. problem description, discussion, solution and upgrade information 2) pending vulnerabilities, solutions, workarounds 3) standard appendix (further information) ______________________________________________________________________________ 1) problem description, brief discussion, solution, upgrade information The ifup-dhcp script which is part of the sysconfig package is responsible for setting up network-devices using configuration data obtained from a DHCP server by the dhcpcd DHCP client. It is possible for remote attackers to feed this script with evil data via spoofed DHCP replies for example. This way ifup-dhcp could be tricked into executing arbitrary commands as root. The ifup-dhcp shellscript has been fixed to not source the file containing the possible evil data anymore. Even though the sysconfig package is installed by default, this problem only affects systems with certain dhcp network-setups so only users using DHCP should update their sysconfig package. Please download the update package for your distribution and verify its integrity by the methods listed in section 3) of this announcement. Then, install the package using the command "rpm -Fhv file.rpm" to apply the update. Our maintenance customers are being notified individually. The packages are being offered to install from the maintenance web. i386 Intel Platform: SuSE-8.0 ftp://ftp.suse.com/pub/suse/i386/update/8.0/a1/sysconfig-0.23.14-60.i386.rpm 4d6a9f1a3e1a461ebbea9a6e98f4e894 source rpm: ftp://ftp.suse.com/pub/suse/i386/update/8.0/zq1/sysconfig-0.23.14-60.src.rpm d0fdfe02cfc9b7fc32fed8da6c16cf9d ______________________________________________________________________________ 2) Pending vulnerabilities in SuSE Distributions and Workarounds: - mozilla/netscape The mozilla browser in version 0.9.7 or higher and the netscape browser in version 6.1 or higher contain a flaw which allows remote sites to read arbitrary files if the user running the browser has the permission to do so. Fixed packages for the mozilla browser will be available soon on our ftp-servers. Patches for the affected netscape browser are not yet available due to missing fixes from Netscape. - xpilot It has been reported that the xpilot server contains a buffer-overflow which allows remote attackers to execute arbitrary commands as the user running the server. The overflow has been fixed and new xpilot packages are available on our ftp-servers. Please update to the newest xpilot packages if you used to run this program. ______________________________________________________________________________ 3) standard appendix: authenticity verification, additional information - Package authenticity verification: SuSE update packages are available on many mirror ftp servers all over the world. While this service is being considered valuable and important to the free and open source software community, many users wish to be sure about the origin of the package and its content before installing the package. There are two verification methods that can be used independently from each other to prove the authenticity of a downloaded file or rpm package: 1) md5sums as provided in the (cryptographically signed) announcement. 2) using the internal gpg signatures of the rpm package. 1) execute the command md5sum <name-of-the-file.rpm> after you downloaded the file from a SuSE ftp server or its mirrors. Then, compare the resulting md5sum with the one that is listed in the announcement. Since the announcement containing the checksums is cryptographically signed (usually using the key security(a)suse.de), the checksums show proof of the authenticity of the package. We disrecommend to subscribe to security lists which cause the email message containing the announcement to be modified so that the signature does not match after transport through the mailing list software. Downsides: You must be able to verify the authenticity of the announcement in the first place. If RPM packages are being rebuilt and a new version of a package is published on the ftp server, all md5 sums for the files are useless. 2) rpm package signatures provide an easy way to verify the authenticity of an rpm package. Use the command rpm -v --checksig <file.rpm> to verify the signature of the package, where <file.rpm> is the filename of the rpm package that you have downloaded. Of course, package authenticity verification can only target an uninstalled rpm package file. Prerequisites: a) gpg is installed b) The package is signed using a certain key. The public part of this key must be installed by the gpg program in the directory ~/.gnupg/ under the user's home directory who performs the signature verification (usually root). You can import the key that is used by SuSE in rpm packages for SuSE Linux by saving this announcement to a file ("announcement.txt") and running the command (do "su -" to be root): gpg --batch; gpg < announcement.txt | gpg --import SuSE Linux distributions version 7.1 and thereafter install the key "build(a)suse.de" upon installation or upgrade, provided that the package gpg is installed. The file containing the public key is placed at the toplevel directory of the first CD (pubring.gpg) and at ftp://ftp.suse.com/pub/suse/pubring.gpg-build.suse.de . - SuSE runs two security mailing lists to which any interested party may subscribe: suse-security(a)suse.com - general/linux/SuSE security discussion. All SuSE security announcements are sent to this list. To subscribe, send an email to <suse-security-subscribe(a)suse.com>. suse-security-announce(a)suse.com - SuSE's announce-only mailing list. Only SuSE's security annoucements are sent to this list. To subscribe, send an email to <suse-security-announce-subscribe(a)suse.com>. For general information or the frequently asked questions (faq) send mail to: <suse-security-info(a)suse.com> or <suse-security-faq(a)suse.com> respectively. ===================================================================== SuSE's security contact is <security(a)suse.com> or <security(a)suse.de>. The <security(a)suse.de> public key is listed below. ===================================================================== ______________________________________________________________________________ The information in this advisory may be distributed or reproduced, provided that the advisory is not modified in any way. In particular, it is desired that the cleartext signature shows proof of the authenticity of the text. SuSE GmbH makes no warranties of any kind whatsoever with respect to the information contained in this security advisory. Type Bits/KeyID Date User ID pub 2048R/3D25D3D9 1999-03-06 SuSE Security Team <security(a)suse.de> pub 1024D/9C800ACA 2000-10-19 SuSE Package Signing Key <build(a)suse.de> - -----BEGIN PGP PUBLIC KEY BLOCK----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org mQGiBDnu9IERBACT8Y35+2vv4MGVKiLEMOl9GdST6MCkYS3yEKeueNWc+z/0Kvff 4JctBsgs47tjmiI9sl0eHjm3gTR8rItXMN6sJEUHWzDP+Y0PFPboMvKx0FXl/A0d M+HFrruCgBlWt6FA+okRySQiliuI5phwqkXefl9AhkwR8xocQSVCFxcwvwCglVcO QliHu8jwRQHxlRE0tkwQQI0D+wfQwKdvhDplxHJ5nf7U8c/yE/vdvpN6lF0tmFrK XBUX+K7u4ifrZlQvj/81M4INjtXreqDiJtr99Rs6xa0ScZqITuZC4CWxJa9GynBE D3+D2t1V/f8l0smsuYoFOF7Ib49IkTdbtwAThlZp8bEhELBeGaPdNCcmfZ66rKUd G5sRA/9ovnc1krSQF2+sqB9/o7w5/q2qiyzwOSTnkjtBUVKn4zLUOf6aeBAoV6NM CC3Kj9aZHfA+ND0ehPaVGJgjaVNFhPi4x0e7BULdvgOoAqajLfvkURHAeSsxXIoE myW/xC1sBbDkDUIBSx5oej73XCZgnj/inphRqGpsb+1nKFvF+rQoU3VTRSBQYWNr YWdlIFNpZ25pbmcgS2V5IDxidWlsZEBzdXNlLmRlPohcBBMRAgAcBQI57vSBBQkD wmcABAsKAwQDFQMCAxYCAQIXgAAKCRCoTtronIAKyl8sAJ98BgD40zw0GHJHIf6d NfnwI2PAsgCgjH1+PnYEl7TFjtZsqhezX7vZvYCIRgQQEQIABgUCOnBeUgAKCRCe QOMQAAqrpNzOAKCL512FZvv4VZx94TpbA9lxyoAejACeOO1HIbActAevk5MUBhNe LZa/qM2JARUDBRA6cGBvd7LmAD0l09kBATWnB/9An5vfiUUE1VQnt+T/EYklES3t XXaJJp9pHMa4fzFa8jPVtv5UBHGee3XoUNDVwM2OgSEISZxbzdXGnqIlcT08TzBU D9i579uifklLsnr35SJDZ6ram51/CWOnnaVhUzneOA9gTPSr+/fT3WeVnwJiQCQ3 0kNLWVXWATMnsnT486eAOlT6UNBPYQLpUprF5Yryk23pQUPAgJENDEqeU6iIO9Ot 1ZPtB0lniw+/xCi13D360o1tZDYOp0hHHJN3D3EN8C1yPqZd5CvvznYvB6bWBIpW cRgdn2DUVMmpU661jwqGlRz1F84JG/xe4jGuzgpJt9IXSzyohEJB6XG5+D0BiF0E ExECAB0FAjxqqTQFCQoAgrMFCwcKAwQDFQMCAxYCAQIXgAAKCRCoTtronIAKyp1f AJ9dR7saz2KPNwD3U+fy/0BDKXrYGACfbJ8fQcJqCBQxeHvt9yMPDVq0B0W5Ag0E Oe70khAIAISR0E3ozF/la+oNaRwxHLrCet30NgnxRROYhPaJB/Tu1FQokn2/Qld/ HZnh3TwhBIw1FqrhWBJ7491iAjLR9uPbdWJrn+A7t8kSkPaF3Z/6kyc5a8fas44h t5h+6HMBzoFCMAq2aBHQRFRNp9Mz1ZvoXXcI1lk1l8OqcUM/ovXbDfPcXsUVeTPT tGzcAi2jVl9hl3iwJKkyv/RLmcusdsi8YunbvWGFAF5GaagYQo7YlF6UaBQnYJTM 523AMgpPQtsKm9o/w9WdgXkgWhgkhZEeqUS3m5xNey1nLu9iMvq9M/iXnGz4sg6Q 2Y+GqZ+yAvNWjRRou3zSE7Bzg28MI4sAAwYH/2D71Xc5HPDgu87WnBFgmp8MpSr8 QnSs0wwPg3xEullGEocolSb2c0ctuSyeVnCttJMzkukL9TqyF4s/6XRstWirSWaw JxRLKH6Zjo/FaKsshYKf8gBkAaddvpl3pO0gmUYbqmpQ3xDEYlhCeieXS5MkockQ 1sj2xYdB1xO0ExzfiCiscUKjUFy+mdzUsUutafuZ+gbHog1CN/ccZCkxcBa5IFCH ORrNjq9pYWlrxsEn6ApsG7JJbM2besW1PkdEoxak74z1senh36m5jQvVjA3U4xq1 wwylxadmmJaJHzeiLfb7G1ZRjZTsB7fyYxqDzMVul6o9BSwO/1XsIAnV1uuITAQY EQIADAUCOe70kgUJA8JnAAAKCRCoTtronIAKyksiAJsFB3/77SkH3JlYOGrEe1Ol 0JdGwACeKTttgeVPFB+iGJdiwQlxasOfuXyITAQYEQIADAUCPGqpWQUJCgCCxwAK CRCoTtronIAKyofBAKCSZM2UFyta/fe9WgITK9I5hbxxtQCfX+0ar2CZmSknn3co SPihn1+OBNyZAQ0DNuEtBAAAAQgAoCRcd7SVZEFcumffyEwfLTcXQjhKzOahzxpo omuF+HIyU4AGq+SU8sTZ/1SsjhdzzrSAfv1lETACA+3SmLr5KV40Us1w0UC64cwt A46xowVq1vMlH2Lib+V/qr3b1hE67nMHjysECVx9Ob4gFuKNoR2eqnAaJvjnAT8J /LoUC20EdCHUqn6v+M9t/WZgC+WNR8cq69uDy3YQhDP/nIan6fm2uf2kSV9A7ZxE GrwsWl/WX5Q/sQqMWaU6r4az98X3z90/cN+eJJ3vwtA+rm+nxEvyev+jaLuOQBDf ebh/XA4FZ35xmi+spdiVeJH4F/ubaGlmj7+wDOF3suYAPSXT2QAFEbQlU3VTRSBT ZWN1cml0eSBUZWFtIDxzZWN1cml0eUBzdXNlLmRlPokBFQMFEDbhLUfkWLKHsco8 RQEBVw4H/1vIdiOLX/7hdzYaG9crQVIk3QwaB5eBbjvLEMvuCZHiY2COUg5QdmPQ 8SlWNZ6k4nu1BLcv2g/pymPUWP9fG4tuSnlUJDrWGm3nhyhAC9iudP2u1YQY37Gb B6NPVaZiYMnEb4QYFcqv5c/r2ghSXUTYk7etd6SW6WCOpEqizhx1cqDKNZnsI/1X 11pFcO2N7rc6byDBJ1T+cK+F1Ehan9XBt/shryJmv04nli5CXQMEbiqYYMOu8iaA 8AWRgXPCWqhyGhcVD3LRhUJXjUOdH4ZiHCXaoF3zVPxpeGKEQY8iBrDeDyB3wHmj qY9WCX6cmogGQRgYG6yJqDalLqrDOdmJARUDBRA24S0Ed7LmAD0l09kBAW04B/4p WH3f1vQn3i6/+SmDjGzUu2GWGq6Fsdwo2hVM2ym6CILeow/K9JfhdwGvY8LRxWRL hn09j2IJ9P7H1Yz3qDf10AX6V7YILHtchKT1dcngCkTLmDgC4rs1iAAl3f089sRG BafGPGKv2DQjHfR1LfRtbf0P7c09Tkej1MP8HtQMW9hPkBYeXcwbCjdrVGFOzqx+ AvvJDdT6a+oyRMTFlvmZ83UV5pgoyimgjhWnM1V4bFBYjPrtWMkdXJSUXbR6Q7Pi RZWCzGRzwbaxqpl3rK/YTCphOLwEMB27B4/fcqtBzgoMOiaZA0M5fFoo54KgRIh0 zinsSx2OrWgvSiLEXXYKiEYEEBECAAYFAjseYcMACgkQnkDjEAAKq6ROVACgjhDM /3KM+iFjs5QXsnd4oFPOnbkAnjYGa1J3em+bmV2aiCdYXdOuGn4ZiQCVAwUQN7c7 whaQN/7O/JIVAQEB+QP/cYblSAmPXxSFiaHWB+MiUNw8B6ozBLK0QcMQ2YcL6+Vl D+nSZP20+Ja2nfiKjnibCv5ss83yXoHkYk2Rsa8foz6Y7tHwuPiccvqnIC/c9Cvz dbIsdxpfsi0qWPfvX/jLMpXqqnPjdIZErgxpwujas1n9016PuXA8K3MJwVjCqSKI RgQQEQIABgUCOhpCpAAKCRDHUqoysN/3gCt7AJ9adNQMbmA1iSYcbhtgvx9ByLPI DgCfZ5Wj+f7cnYpFZI6GkAyyczG09sE= =LRKC - -----END PGP PUBLIC KEY BLOCK----- -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv iQEVAwUBPNj243ey5gA9JdPZAQFDcQf8DMhbYdX+UsDGAwO4QpPylxxnh31Dt476 czcCmCH8XbzyNxIhdQeYAkSJ0rkRJD7xC+lgXjQbAv7TzAFsl6FGnsZDgB/b62z8 2vG+1iWoxYwQTSl7g7kpsQ+pDuZ8737ZQr7DY2gg9nLK4xPngt/C8TuBDVFIcqcE DrMlfUAWTiAvIVAPZxVWrbOjqVG6B00LeiHu/kQkOgXKQffqKKbNUa9Iyu5Fb/6Q CNO311fw2HCs4Ef7veZXJGmua8TGbbnj7ydWVmteLdYVbxEZ4faIFpJPiuJAcHI3 C49BNAEKo5GEBtvq/CPO35oK97uO5xiEhTDWA76Vbl27kyRluvGdqQ== =spzT -----END PGP SIGNATURE----- -- ~ ~ perl self.pl ~ $_='print"\$_=\47$_\47;eval"';eval ~ krahmer(a)suse.de - SuSE Security Team ~

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Re: Re: [suse-security] IPChains and IPTables
by BLeonhardt＠analytek.de 08 May '02

08 May '02

Hi again, I 've read the pages ... ... now I'm not sure if I did understand that right ... .. IP-Chains can analyze if a packet is permitted to "go to the target system" or not ( if so, the packet will be dropped or routed ) .. IP-Tables can analyze all packets and Flags ( SYN, FIN, etc. ) no matter where the packets destination is ( if a rule will apply the packet will be dropped or routed ) .. right so ?!?!??!?!??!?! Thanks ! Regards, Bruno Leonhardt Michael Appeldorn An: suse-security(a)suse.com, BLeonhardt(a)analytek.de <appeldorn@codix Kopie: x.de> Thema: Re: [suse-security] IPChains and IPTables 07.05.02 11:34 Bitte antworten an Appeldorn Hi all, > >what exactly are the main differences between IPChains and IPTables ? > ask google 4: difference ipchains iptables snip ------ Message-ID: <EB5EB93D190ED31180430008C7F3714DB4A503@COSEXCH> From: "Woodworth, Lora" <Lora.Woodworth(a)cta.com> To: "'security-discuss(a)linuxsecurity.com'" <security-discuss(a)linuxsecurity.com> Subject: RE: Difference in ipchains and iptable Date: Wed, 31 Oct 2001 10:32:35 -0700 In short and in general iptables is in the 2.4 Kernel and will allow you to build a stateful firewall. ipchains was in 2.2 Kernel and gives you a stateless firewall. There is a good article about building an iptables based firewall at: http://www.linuxworld.com/site-stories/2001/0920.ipchains.html Also if you want more information do a search at: http://www.linuxsecurity.com and it has quite a few links. ------ snap Yours Michael Appeldorn -- To unsubscribe, e-mail: suse-security-unsubscribe(a)suse.com For additional commands, e-mail: suse-security-help(a)suse.com Security-related bug reports go to security(a)suse.de, not here

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Re: [suse-security] IPChains and IPTables
by Peer Stefan 08 May '02

08 May '02

Hi, > From: BLeonhardt(a)analytek.de [mailto:BLeonhardt@analytek.de] > .. IP-Chains can analyze if a packet is permitted to "go to the target > system" or not ( if so, the packet will be dropped or routed ) yes. that's right. > .. IP-Tables can analyze all packets and Flags ( SYN, FIN, > etc. ) no matter where the packets destination is ( if a > rule will apply the packet will be dropped or routed ) basically yes. as far as this is concerned, ipchains and iptables are similar. packets, which arrive at the iptables/ipchains-host are dropped, rejected, accepted, forwarded ... according to the rules. ipchains also understands syn-flags: #ipchains -h ... [!] --syn -y match TCP packets only when SYN set ... # one main difference is, iptables keeps track of existing connections (connection-states). you may apply rules according to the state of the connection (NEW,ESTABLISHED,...), which may come in handy with udp-connections, since there are no such things as syns. > Thanks ! you're welcome :-) > Regards, > Bruno Leonhardt regards, stefan

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RE: Telnet Proxy
by d_lord＠gmx.de 07 May '02

07 May '02

Hi Martin, Your telnet problem could be solved in two ways with a shell script as "login shell" as mentioned befor. - real proxy, the firewall opens the telnet connection to the host specified - forwarding over ipchains/iptables rule Greetings D. Lord -- GMX - Die Kommunikationsplattform im Internet. http://www.gmx.net

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Telnet-Proxy
by Martin Sckopke 07 May '02

07 May '02

Hi all, has anybody ever heard of a telnet-proxy? Checkpoints Firewall-1 offers this kind of functionality: You connect to the firewall on port 23, firewall asks for authentification and a hostname and afterwards you get a transparent telnet session to the named host, without any intererence by the firewall. Is something like that available as open source software? Thanks a lot, Martin

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IPChains and IPTables
by BLeonhardt＠analytek.de 07 May '02

07 May '02

Hi all, what exactly are the main differences between IPChains and IPTables ? Is it true that IPChains is only able to work as packet-filter ( like destination : port forbidden ) ? Regards, Bruno Leonhardt

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blocking certain ips
by Mike Otto 07 May '02

07 May '02

SuSEfirewall2 v2.1 iptables v1.2.5 Linux-Kernel 2.4.18 (5) ------------------------- Hi I´m looking for a way to block certain IP Addresses from all ports on my computer. I tried this at the console: iptables -A FORWARD -p tcp -s 192.168.100.1 -d 0.0.0.0/0.0.0.0 --dport 80 -j DROP but i can still connect from 192.168.100.1 to port 80 with telnet. Do I have to activate this rule first? or does it have to fit into firewall2-custom.rc.config, then restart firewall? Regards, Mike

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RE: [suse-security] blocking certain ips
by Reckhard, Tobias 07 May '02

07 May '02

> Someone who explains to me why I cant just append rule 3,4,5,6 at the > end of the INPUT rules (APPEND) instead I have to INSERT them? > Is it because of rule 23 which cannot be overwritten? > Would make sense to me. Then I better insert right bevore line > 23, right? Is this a serious question? [snip] > 23 DROP all -- 0.0.0.0/0 0.0.0.0/0 > 24 REJECT tcp -- 0.0.0.0/0 0.0.0.0/0 tcp > dpt:113 reject-with tcp-reset [snip] Of course you *can* append rules 3-6 at the end of the INPUT chain, but they won't have any effect because of rule 23, which matches each and every IP packet and drops it on the floor. Rule 23 is in no way read-only, where did you get that idea? BTW, rule 24 is superfluous as well, it will never be hit, you might as well remove it. Tobias

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RE: [suse-security] blocking certain ips
by Reckhard, Tobias 07 May '02

07 May '02

> > Now I need something that lists all INPUT rules by number > on the screen > > Is > > /usr/sbin/iptables -L -nv > > what you need ? If you want numbers, append '--line-numbers' to that, giving you: /usr/sbin/iptables -L -nv --line-numbers Tobias

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RE: [suse-security] Telnet-Proxy
by Reckhard, Tobias 07 May '02

07 May '02

> You connect to the firewall on port 23, firewall asks for > authentification and a hostname and afterwards you get a > transparent telnet session to the named host, without > any intererence by the firewall. > > Is something like that available as open source software? I believe the TIS Firewall Toolkit (FWTK) contains a telnet proxy. Tobias

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RE: [suse-security] Slightly OT but: SuSE 8.0 Yast Online Update and GPG
by Duane Kehoe 06 May '02

06 May '02

Maybe for You and Me a broken YOU is fine or using fou4s is fine. I am thinking about the larger public here. And I do think that a flaw in YOU is a show stopper as it is one of SuSE's main selling and advertising points of this distro. ______________________________________________________________ Duane Kehoe phone: 414.908.1814 Programmer / Analyst fax: 414.908.1601 Weyco Group, Inc. email: dkehoe(a)weycogroup.com -----Original Message----- From: Fred A. Miller [mailto:fm@cupserv.org] Sent: Monday, May 06, 2002 3:16 PM To: Duane Kehoe Subject: Re: [suse-security] Slightly OT but: SuSE 8.0 Yast Online Update and GPG -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Monday 06 May 2002 4:15 pm, Duane Kehoe wrote: > Yah I could, but I really want to use the default distro tools first before > I change over to a third party tool. Especially in areas where I could > negate my support solutions. Really I guess I have been following fou4s > but have no interest in using someone else's tool when I just paid 80.00 to > get the supplied and supported tools that should work. Plus SuSE appears > to have made significant improvements in speed which was the only negative > side of YOU for me. > I really and truly believe this is SuSE's responsibility to it's users, > especially when they make claims like everything is perfect after a 2 month > beta testing period. > > >I think the bug is in KDE, but not sure. For now, just answer "install" > > for all the files, then after the list is downloaded, do the > > upgrade.....it'll only upgrade what's needed. > > Also this is not a kde bug as it occurs from command line, kontrol panel > modules, and stand alone GUI Yast2. [snip] 'Hadn't checked it from command line. Yes, it's annoying, but NOT a show stopper. Fred - -- Fred A. Miller Systems Administrator Cornell Univ. Press Services fm(a)cupserv.org, www.cupserv.org - --- SuSE Linux v8.0 Pro--- -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iEYEARECAAYFAjzW5I4ACgkQB9vk4ichYXe5RQCgh72kSoBYcOP/JLns5Br5kR+C HvwAoLJuvfahupFl1oWBo1kpnodEy3ta =80fl -----END PGP SIGNATURE-----

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RE: [suse-security] Slightly OT but: SuSE 8.0 Yast Online Update and GPG
by Duane Kehoe 06 May '02

06 May '02

Yah I could, but I really want to use the default distro tools first before I change over to a third party tool. Especially in areas where I could negate my support solutions. Really I guess I have been following fou4s but have no interest in using someone else's tool when I just paid 80.00 to get the supplied and supported tools that should work. Plus SuSE appears to have made significant improvements in speed which was the only negative side of YOU for me. I really and truly believe this is SuSE's responsibility to it's users, especially when they make claims like everything is perfect after a 2 month beta testing period. >I think the bug is in KDE, but not sure. For now, just answer "install" for >all the files, then after the list is downloaded, do the upgrade.....it'll >only upgrade what's needed. Also this is not a kde bug as it occurs from command line, kontrol panel modules, and stand alone GUI Yast2. ______________________________________________________________ Duane Kehoe phone: 414.908.1814 Programmer / Analyst fax: 414.908.1601 Weyco Group, Inc. email: dkehoe(a)weycogroup.com -----Original Message----- From: Markus Gaugusch [mailto:markus@gaugusch.at] Sent: Monday, May 06, 2002 2:52 PM To: Duane Kehoe Subject: Re: [suse-security] Slightly OT but: SuSE 8.0 Yast Online Update and GPG > What is the deal with the broken YOU / GPG on SuSE 8.0pro? Is there a work > around, or a fix planned? Can someone please let me know. I updated to 8.0 > over the weekend and everything was great, until ;( I ran YOU. Which > proceeded to tell me that either GPG was not installed, or SuSE had not > signed the update RPMs correctly, I of course installed the updates anyway. > Now I love SuSE but this is a definite show stopper for me(in fact I thought > about downgrading again!!), and worse yet imagine all the new users who will > be alienated by this type of horrific, and it is, error. I can replicate > this on different machines and on every install, this weekend I ran around > 10 installs to verify all of which reported the same error. Did you try fou4s? http://www.gaugusch.at/fou4s It replaces YOU and works with 8.0 (and gpg) Markus -- _____________________________ /"\ Markus Gaugusch ICQ 11374583 \ / ASCII Ribbon Campaign markus(a)gaugusch.at X Against HTML Mail / \

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SuSE 8.0 no ftp installation possible ? NFS is insecure.
by Gunther Stammwitz 06 May '02

06 May '02

Hello, I've just been trying to install SuSE 8.0 via FTP, but I couldn't believe it hwen I saw it: there is no ftp-installation option. There are only two options left: - Installation via NFS (insecure !!!!) - Installation via SMB/Windows file sharing (doesn't work, because the installer can't find a no further specified module). Please don't force us to use nfs - that sucks and is _really_ insecure. Am I missing something or did SuSE remove the ftp-installer. Andy why doesn't the (also insecure) smb-installer work ? Bye, Gunther

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VPN masquerading
by Joost van der Lugt 06 May '02

06 May '02

Hi all, I am trying to set up VPN masquerading, for a Windows box, and just wondered if there was an easy way to do this, using just the firewall.rc.config script, or do both that plus the custom config script have to be used? I have seen the VPN how-to, however just wondered about a how to aply this with SuSE's scripts. Thanks for any suggestions, (PS if there is someone familiar with setting upo VPN on the SuSe box itself, I would be very interested as well..., of course) - Cheers, Joost

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Partitions
by Ricardo Javier Aranibar León 06 May '02

06 May '02

Hi list, I need information about secure partitions, I have HD 40G, I like a web server an mail server. I saw that web master partitions yours disk with var/, boot/, home/, I like to know what directorys create and how I can asing size for this? If someone can help me, I will Thank full Thanks, Ricardo _________________________________________________________________ Envíe y reciba su correo de Hotmail desde el móvil: http://mobile.msn.com

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Re: [suse-security] DynDNS Clients
by Sven Lehmann 06 May '02

06 May '02

Hello, my English isn't so good, forgives my writing style. I had the problem with the blinking buttons for the standard Kernel of SuSE 7.3, as me used. The problem more highly than 4.2.16 didn't appear after update on any more. Mfg Svele John Andersen <jsa(a)pen.homeip.net> wrote .. > On Sunday 05 May 2002 06:44 am, Andreas.Novak(a)student.fh-nuernberg.de wrote: > > Dear List, > > > > I've recently downloaded the "dyndnsupdate client" for DynDns.org. I > think > > it's much easier to use than the other clients. Anyway I got problems. > > After I execute the binary with the appropriate options, it says that > the > > update was successful, afterwards my WebServer crashes. It refuses any > > input from the keyboard, and the Caps Lock und the Scroll Lock lights > are > > on. I've similar problems with another client for dyndns ( the ddclient > I > > think ). So most probably it's not a specific problem to this client. > > Perhaps I just configured something wrong?? > > Sounds to me like it put your processor in a tight loop. > It matters not how easy to config a daemon is if it causes > this. > > I've been running ez-ipupdate on SuSE, TurboLinux, Mandrake > and FreeBDS without a single problem. Its linked to > the clients pages on dyndns. > > -- > _________________________________________________ > No I Don't Yahoo! > And I'm getting pretty sick of being asked if I do. > _________________________________________________ > John Andersen / Juneau Alaska > > -- > To unsubscribe, e-mail: suse-security-unsubscribe(a)suse.com > For additional commands, e-mail: suse-security-help(a)suse.com > Security-related bug reports go to security(a)suse.de, not here

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Re: [suse-security] SuSEfirewall2 and nimda
by Michael Stern 06 May '02

06 May '02

>iptables -A block -p tcp --dport http -m state --state NEW,ESTABLISHED,RELATED \ -m string --string "root.exe" -j DROP< i'm curious .. does this drop the packet only or all further packets (which might come in) too? thank you, michael

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