March 2001 - openSUSE Security - openSUSE Mailing Lists

SuSE Security Announcement: joe (SuSE-SA:2001:09)
by Thomas Biege 28 Mar '01

28 Mar '01

-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SuSE Security Announcement Package: joe Announcement-ID: SuSE-SA:2001:09 Date: Tuesday, March 27th, 2001 17.03 MEST Affected SuSE versions: 6.1, 6.2, 6.3, 6.4, 7.0, 7.1 Vulnerability Type: local privilege escalation Severity (1-10): 3 SuSE default package: yes Other affected systems: all system using joe Content of this advisory: 1) security vulnerability resolved: joe 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 A bug in joe(1), a userfriendly text editor, was found by Christer Öberg of Wkit Security AB a few weeks ago. After starting joe(1) it tries to open its configuration file joerc in the current directory, the users home directory and some other locations. joe(1) doesn't check the ownership of joerc when trying the current directory. An attacker could place a malicious joerc file in a public writeable directory, like /tmp, to execute commands with the privilege of any user (including root), which runs joe while being in this directory. Download the update package from locations desribed below and install the package with the command `rpm -Uhv file.rpm'. The md5sum for each file is in the line below. You can verify the integrity of the rpm files using the command `rpm --checksig --nogpg file.rpm', independently from the md5 signatures below. i386 Intel Platform: SuSE-7.1 ftp://ftp.suse.com/pub/suse/i386/update/7.1/ap1/joe-2.8-300.i386.rpm 3140f1eb79eb246ad98f7687de517371 source rpm: ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/joe-2.8-300.src.rpm 0c04bb25b8ae452f1fcdfe11af32e1b6 SuSE-7.0 ftp://ftp.suse.com/pub/suse/i386/update/7.0/ap1/joe-2.8-304.i386.rpm 2a406de36322fc7bc28aaeca0bbdf54d source rpm: ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/joe-2.8-304.src.rpm 2aac0d130597d580d96c75d59397958c SuSE-6.4 ftp://ftp.suse.com/pub/suse/i386/update/6.4/ap1/joe-2.8-303.i386.rpm 348a5e4a981f76943c77431606e5c3b2 source rpm: ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/joe-2.8-303.src.rpm 9f938aa365460257baf56f5f92f565ee SuSE-6.3 ftp://ftp.suse.com/pub/suse/i386/update/6.3/ap1/joe-2.8-302.i386.rpm 236ec54a0251859e1c2c1fc4018b5dae source rpm: ftp://ftp.suse.com/pub/suse/i386/update/6.3/zq1/joe-2.8-302.src.rpm 49b638dd238cacc8e99048ee5a8024ea SuSE-6.2 ftp://ftp.suse.com/pub/suse/i386/update/6.2/ap1/joe-2.8-302.i386.rpm 094577b41a2ad5baa0d16f4d53378d0e source rpm: ftp://ftp.suse.com/pub/suse/i386/update/6.2/zq1/joe-2.8-302.src.rpm 78333a2bac40b08db1e54ccaf1380caf SuSE-6.1 ftp://ftp.suse.com/pub/suse/i386/update/6.1/ap1/joe-2.8-305.i386.rpm 72fbb78af21f3878f1ae8b8bc87c96f4 source rpm: ftp://ftp.suse.com/pub/suse/i386/update/6.1/zq1/joe-2.8-305.src.rpm b4fbe27a24bf66d60db45da3c3d13020 Sparc Platform: SuSE-7.1 ftp://ftp.suse.com/pub/suse/sparc/update/7.1/ap1/joe-2.8-290.sparc.rpm eeb78e413ee0b48d39ccdab29228ae80 source rpm: ftp://ftp.suse.com/pub/suse/sparc/update/7.1/zq1/joe-2.8-290.src.rpm f29199161ffd38f3f26c82b5d21ba89b SuSE-7.0 ftp://ftp.suse.com/pub/suse/sparc/update/7.0/ap1/joe-2.8-292.sparc.rpm d1d70f58df37de53f05734d90be596fa source rpm: ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/joe-2.8-292.src.rpm 45091ece9cb66e4f093d07b0386fd2b9 AXP Alpha Platform: SuSE-7.0 ftp://ftp.suse.com/pub/suse/axp/update/7.0/ap1/joe-2.8-296.alpha.rpm 85e609519bbfbbc0be5aec7b8de2dffc source rpm: ftp://ftp.suse.com/pub/suse/axp/update/7.0/zq1/joe-2.8-296.src.rpm ce623f8a73b1f6395eb9498324cc1e21 SuSE-6.4 ftp://ftp.suse.com/pub/suse/axp/update/6.4/ap1/joe-2.8-293.alpha.rpm d930c6a2f0757f51f04409946f6152f8 source rpm: ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/joe-2.8-293.src.rpm 0b20e5bd36f0feeaf78cb4815566e982 SuSE-6.3 ftp://ftp.suse.com/pub/suse/axp/update/6.3/ap1/joe-2.8-293.alpha.rpm 6278e4dd4a42d4e091d1a08e3f617fa2 source rpm: ftp://ftp.suse.com/pub/suse/axp/update/6.3/zq1/joe-2.8-293.src.rpm 88f428cc9c916b9159dfb54144c7802e SuSE-6.1 ftp://ftp.suse.com/pub/suse/axp/update/6.1/ap1/joe-2.8-295.alpha.rpm 3e531066b0495be2261f02ef2d4583f0 source rpm: ftp://ftp.suse.com/pub/suse/axp/update/6.1/zq1/joe-2.8-295.src.rpm 1d7796f1fad01365e40a944f0db84470 PPC PowerPC Platform: SuSE-7.1 ftp://ftp.suse.com/pub/suse/ppc/update/7.1/ap1/joe-2.8-272.ppc.rpm f11094b9f1afeb04786030e3a140ed03 source rpm: ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/joe-2.8-272.src.rpm 4058ea46c9d75976a24a6ac419fc19d5 SuSE-7.0 ftp://ftp.suse.com/pub/suse/ppc/update/7.0/ap1/joe-2.8-274.ppc.rpm c385a2ca601cf9b01ad2d39433d6a872 source rpm: ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/joe-2.8-274.src.rpm b667ea68d356a9582d3696ad68869c69 SuSE-6.4 ftp://ftp.suse.com/pub/suse/ppc/update/6.4/ap1/joe-2.8-273.ppc.rpm 4f6c2c20e961aea4987381d12692af6c source rpm: ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/joe-2.8-273.src.rpm 8c3ebda871c54afc11a24d80d207c34e ______________________________________________________________________________ 2) Pending vulnerabilities in SuSE Distributions and Workarounds: - We are in the process of preparing update packages for the man package which has been found vulnerable to a commandline format string bug. The man command is installed suid man on SuSE systems. When exploited, the bug can be used to install a different man binary to introduce a trojan into the system. As an interim workaround, we recommend to `chmod -s /usr/bin/man´ and ignore the warnings and errors when viewing manpages. - The file browser MidnightCommander (mc) is vulnerable to unwanted program execution. Updates are currently being built. - Two bugs were found in the text editor vim. These bugs are currently being fixed. - A bufferoverflow in sudo was discovered and fixed RPMs will be available as soon as possible. A exploit was not made public until now. ______________________________________________________________________________ 3) standard appendix: 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>. =============================================== ______________________________________________________________________________ The information in this advisory may be distributed or reproduced, provided that the advisory is not modified in any way. SuSE GmbH makes no warranties of any kind whatsoever with respect to the information contained in this security advisory. -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv iQEVAwUBOsG6aney5gA9JdPZAQEkMAgAiLgKgaIQS9psq0wwl/RJDaXCKwopeKsx meuZexE+iBgCXEeDAYtsbUEgTtHfTZ7XO5VwsIfFD9r8yOoAxWUcCkmIHOTYlRF3 jC4BTN5PkhbY7JymlSaEIreEfgflNWfYY1soaUm0LYy6Q/jDvMYReMh7uiG3wpPw ja8wiLjJ+PZa7OqtCsk9zTLBmFeTHJJ0mYeiy8qD4xASUW+GY6qE9i9naYrZgN9L oEY6DrOy6RERh35+NKMaI21o+yULhxPcV1AUYUndyc4U3OQErNEoLdViU6F39KeB JA9sgxk8iMvtqEyyCWaWJyRahrzo05gBepjUy+DjTovmJGMOhR+VAg== =58ij -----END PGP SIGNATURE----- Bye, Thomas -- Thomas Biege, SuSE GmbH, Schanzaeckerstr. 10, 90443 Nuernberg E@mail: thomas(a)suse.de Function: Security Support & Auditing "lynx -source http://www.suse.de/~thomas/thomas.pgp | pgp -fka" Key fingerprint = 09 48 F2 FD 81 F7 E7 98 6D C7 36 F1 96 6A 12 47

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SuSE Security Announcement: eperl (SuSE-SA:2001:08)
by Thomas Biege 28 Mar '01

28 Mar '01

-----BEGIN PGP SIGNED MESSAGE----- ______________________________________________________________________________ SuSE Security Announcement Package: eperl Announcement-ID: SuSE-SA:2001:08 Date: Tuesday, March 27th, 2001 16.00 MEST Affected SuSE versions: 6.3, 6.4, 7.0, 7.1 Vulnerability Type: local and remote compromise Severity (1-10): 6 SuSE default package: no Other affected systems: all system using eperl package Content of this advisory: 1) security vulnerability resolved: eperl 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 ePerl program is a interpreter for the Embedded Perl 5 Language. It's main purpose is to serve as Webserver scripting language for dynamic HTML page programming. Besides this it could also serve as a standalone Unix filter. Fumitoshi Ukai and Denis Barbier have found several potential buffer overflows, which could lead to local privilege escalation if installed setuid (note: it's not installed setuid per default) or to remote compromise. There is currently no efficient measure against the security problems in the eperl perl interpreter other than not using or updating it. SuSE provides update packages for the defective software. SuSE Linux version before 6.3 don't include the eperl package. Download the update package from locations described below and install the package with the command `rpm -Uhv file.rpm'. The md5sum for each file is in the line below. You can verify the integrity of the rpm files using the command `rpm --checksig --nogpg file.rpm', independently from the md5 signatures below. i386 Intel Platform: SuSE-7.1 ftp://ftp.suse.com/pub/suse/i386/update/7.1/d2/eperl-2.2.14-206.i386.rpm e613b06d47dcfb7bbcea8c3d0c0e678b source rpm: ftp://ftp.suse.com/pub/suse/i386/update/7.1/zq1/eperl-2.2.14-206.src.rpm c58a95f3b8ae757ea4d72f3157e2ea62 SuSE-7.0 ftp://ftp.suse.com/pub/suse/i386/update/7.0/d1/eperl-2.2.14-203.i386.rpm e66520cc0062e25495941542dd5b1f82 source rpm: ftp://ftp.suse.com/pub/suse/i386/update/7.0/zq1/eperl-2.2.14-203.src.rpm 34d6682524154c9fb7b5fbec4f4ea82e SuSE-6.4 ftp://ftp.suse.com/pub/suse/i386/update/6.4/d1/eperl-2.2.14-203.i386.rpm 4b6a5a89899320a8eeb35c149ae111f5 source rpm: ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/eperl-2.2.14-203.src.rpm 062b14716e52f2649f4380a6a6e4e7f9 SuSE-6.3 ftp://ftp.suse.com/pub/suse/i386/update/6.3/d1/eperl-2.2.14-202.i386.rpm ba75d7f4a64329a3b5c324b3f0742575 source rpm: ftp://ftp.suse.com/pub/suse/i386/update/6.3/zq1/eperl-2.2.14-202.src.rpm c7ae001d4668ba3a0524f94429b1e4e6 Sparc Platform: SuSE-7.1 ftp://ftp.suse.com/pub/suse/sparc/update/7.1/d2/eperl-2.2.14-193.sparc.rpm 9752f8b9df6ac1ffdc68cb4b552d6491 source rpm: ftp://ftp.suse.com/pub/suse/sparc/update/7.1/zq1/eperl-2.2.14-193.src.rpm f09a1ce9288c201ae63e193914fc84ce SuSE-7.0 ftp://ftp.suse.com/pub/suse/sparc/update/7.0/d1/eperl-2.2.14-191.sparc.rpm 900eddc134215569fc88d11ce14c11f3 source rpm: ftp://ftp.suse.com/pub/suse/sparc/update/7.0/zq1/eperl-2.2.14-191.src.rpm 76aaa0efa8ae1c84b80201f73462fc26 AXP Alpha Platform: SuSE-7.0 ftp://ftp.suse.com/pub/suse/axp/update/7.0/d1/eperl-2.2.14-195.alpha.rpm d7b4be8d988f8cd501a33f9d2fb12a07 source rpm: ftp://ftp.suse.com/pub/suse/axp/update/7.0/zq1/eperl-2.2.14-195.src.rpm b0379287f9078fcd244cc720fad92c4d SuSE-6.4 ftp://ftp.suse.com/pub/suse/axp/update/6.4/d1/eperl-2.2.14-195.alpha.rpm 78241206bc1b3927effdb5b1aa4d0ed5 source rpm: ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/eperl-2.2.14-195.src.rpm 325a04ec8c5c3da6b9c2fdf4e2c6c901 SuSE-6.3 ftp://ftp.suse.com/pub/suse/axp/update/6.3/d1/eperl-2.2.14-194.alpha.rpm 88a09004e5c0c2e6174785207e111318 source rpm: ftp://ftp.suse.com/pub/suse/axp/update/6.3/zq1/eperl-2.2.14-194.src.rpm a04cfa3e64aac49f6c148992e9a50189 PPC Power PC Platform: SuSE-7.1 ftp://ftp.suse.com/pub/suse/ppc/update/7.1/d2/eperl-2.2.14-178.ppc.rpm 3e05c702aca97db476155054d113ff95 source rpm: ftp://ftp.suse.com/pub/suse/ppc/update/7.1/zq1/eperl-2.2.14-178.src.rpm 67849b0c1c053eca482508fe2eac3042 SuSE-7.0 ftp://ftp.suse.com/pub/suse/ppc/update/7.0/d1/eperl-2.2.14-177.ppc.rpm 35584e2f1bcebced98fad2ae241824da source rpm: ftp://ftp.suse.com/pub/suse/ppc/update/7.0/zq1/eperl-2.2.14-177.src.rpm 98046dce35c4adfba57cc54c018376d7 SuSE-6.4 ftp://ftp.suse.com/pub/suse/ppc/update/6.4/d1/eperl-2.2.14-176.ppc.rpm 9c36bad7ec2e8f6c31307729c7d21bc8 source rpm: ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/eperl-2.2.14-176.src.rpm eeaf1144dd659fe13b6a943bf40bf65b S/390 Platform: SuSE-7.0 ftp://ftp.suse.com/pub/suse/s390/update/7.0/d1/eperl-2.2.14-182.s390.rpm 416974a30c9c9e435e028f2807e15a51 source rpm: ftp://ftp.suse.com/pub/suse/s390/update/7.0/zq1/eperl-2.2.14-182.src.rpm b14c7d9cbb969cda54b0d9f599f1b5cc ______________________________________________________________________________ 2) Pending vulnerabilities in SuSE Distributions and Workarounds: - We are in the process of preparing update packages for the man package which has been found vulnerable to a commandline format string bug. The man command is installed suid man on SuSE systems. When exploited, the bug can be used to install a different man binary to introduce a trojan into the system. As an interim workaround, we recommend to `chmod -s /usr/bin/man´ and ignore the warnings and errors when viewing manpages. - The file browser MidnightCommander (mc) is vulnerable to unwanted program execution. Updates are currently being built. - Two bugs were found in the text editor vim. These bugs are currently being fixed. - A bufferoverflow in sudo was discovered and fixed RPMs will be available as soon as possible. A exploit was not made public until now. ______________________________________________________________________________ 3) standard appendix: 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>. =============================================== ______________________________________________________________________________ The information in this advisory may be distributed or reproduced, provided that the advisory is not modified in any way. SuSE GmbH makes no warranties of any kind whatsoever with respect to the information contained in this security advisory. ______________________________________________________________________________ -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv iQEVAwUBOsG3GXey5gA9JdPZAQGQtQgAmPBgkp8fCIbo0RJ+mJDa0Zx7W0N8S+Ba LP2tH/cXkW9QPUT5vh1mKbB+LsH6wuG/uv7NG0EMrYHcmy3UFBEFKel4XD4G8XNU BhAKegayEvjYH/OK8q8poVHYdvctrZ00LtfrW7IQkNfCXEVx0ByfaX5w/Qe/GQxQ MWlqdw2klUXpnYZnaYj7mMsdTrc6DrIGdL4uCWozdQcyxGLeh/mQArg4TEdpv7KT OW0LgDgZETo5akS/AwtZn3NE7rh+ZIAUAhPw8iUoK0k6RY+Z+RJa+QFQ+XXv7eHm EXUcUd0wY47j5CROk+g7WzYy92Vn6VVOY63pcbhiv4R8BuPM9WVWJw== =QNk3 -----END PGP SIGNATURE----- Bye, Thomas -- Thomas Biege, SuSE GmbH, Schanzaeckerstr. 10, 90443 Nuernberg E@mail: thomas(a)suse.de Function: Security Support & Auditing "lynx -source http://www.suse.de/~thomas/thomas.pgp | pgp -fka" Key fingerprint = 09 48 F2 FD 81 F7 E7 98 6D C7 36 F1 96 6A 12 47

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Sytem Attack or ?
by Togan Muftuoglu 28 Mar '01

28 Mar '01

Hi everyone Receiving this from the snort can someone explain what the hell is going on I have and ADSL connection on eth1 with dhcp assigned Ip and the lan is on eth0 I am running the snort with -i eth1 as the Daemon with snort-lin defining the HOME_NET 192.168.1.0/24 and EXTERNAL_NET as 212.xxx.xxx.0/22 as outlined with the ifconfig eberything else is left as is. Help is appreciated Mar 27 18:11:49 gardiyan snort: spp_http_decode: IIS Unicode attack detected: 212.xxx.xxx.xxx:61018 -> 195.44.254.18:80 Mar 27 18:12:00 gardiyan snort: spp_http_decode: IIS Unicode attack detected: 212.xxx.xxx.xxx:61019 -> 207.200.86.65:80 Mar 27 18:12:00 gardiyan snort: spp_http_decode: IIS Unicode attack detected: 212.xxx.xxx.xxx:61019 -> 207.200.86.65:80 Mar 27 18:12:02 gardiyan snort: spp_http_decode: IIS Unicode attack detected: 212.xxx.xxx.xxx:61020 -> 207.200.86.65:80 Mar 27 18:12:02 gardiyan snort: spp_http_decode: IIS Unicode attack detected: 212.xxx.xxx.xxx:61020 -> 207.200.86.65:80 Mar 27 18:12:03 gardiyan snort: spp_http_decode: IIS Unicode attack detected: 212.xxx.xxx.xxx:61019 -> 207.200.86.65:80 Mar 27 18:12:08 gardiyan snort: spp_http_decode: IIS Unicode attack detected: 212.xxx.xxx.xxx:61020 -> 207.200.86.65:80 Mar 27 18:12:08 gardiyan snort: spp_http_decode: IIS Unicode attack detected: 212.xxx.xxx.xxx:61020 -> 207.200.86.65:80 Mar 27 18:12:10 gardiyan snort: spp_http_decode: IIS Unicode attack detected: 212.xxx.xxx.xxx:61021 -> 205.188.245.116:80 Mar 27 18:12:10 gardiyan snort: spp_http_decode: IIS Unicode attack detected: 212.xxx.xxx.xxx:61021 -> 205.188.245.116:80 -- Togan Muftuoglu

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Security when compiling App - when do u compile as root or a User
by Steven Thompson 28 Mar '01

28 Mar '01

Hi All When compiling Apps, under which user do you compile the App for security, that does not mess up your system. When do have to compile an App as root? Thanks in advance Steven

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RE: [suse-security] portscannst from many ips to port 16110
by Lewe, Wolfgang 28 Mar '01

28 Mar '01

> Hi there > is there an new trojan whos listening to port 16110??? > > many portscanns at my side in the last two days Hi Rene, It have not to be an new trojan. It can be an older trojan mapped to the port 16110. Regards, Wolfgang

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RE: [suse-security] AW: Squid on Firewall?
by Reckhard, Tobias 28 Mar '01

28 Mar '01

Hi Mike. > > Huh? Get real, man, with that attitude you shouldn't connect anything > > to an untrusted network > > the point is that even if someone exploits a firewall and got root > permissions this person must be the smallest possible threat to the > protected network. > Agreed. You try to reach that point using the principles of least privilege and defence in depth. > If you are logged in as root on a computer that acts as a firewall, > you must not find any way to exploit the internal network: > Let's say you shouldn't. It is impossible to prevent completely. One, perhaps the main point of defence in depth is to give the defender time to realize he's under (partially successful) attack and react to the threat. Firewalling isn't about complete prevention, that's fiction. It's about protection and buying the time you need to be able to protect the soft and juicy insides. > 1) there must not be a ftp client or other tools to download files to > that computer, > 2) there must not be access to a dns server mapping the protected > network thus one must browse the log files to get an idea of the > members of the internal network and make it as hard as possible to > browse files (no editor), > 3) all files should be read only or append only in multiuser mode so > the boot structure cannot be manipulated > 4) the firewall computer should not do anything but filter and > forward traffic > These points all make sense, but they're neither complete nor justified in all situations. > I do not know about squid, but I would put it on a computer behind > the firewall. Even for a 100Mbit network connection any old pentium > 100 (or mac, or sparc, or whatever) with some ram should be able > to handle maximum possible load without problems. Given the fact, > that such a computer will cost less than USD 100,-- so cost should > not be the reason not to have it! > What does your 'firewall' do? Is it a packet filter, perhaps using ipchains? All that does is look at TCP/IP header information. Any exploit against the squid daemon will work regardless of whether it is running on a separate box or the packet filter, provided they're configured the same way. There's no difference between being root on the packet filter or an internal machine with respect to the danger your internal network is in. The only thing that is more difficult if the squid box is internal is that you need to traverse the packet filter to reach the outside, but that's hardly a problem, since you need to allow that box to access 0.0.0.0/0, TCP ports 1-65535 anyhow, not knowing what ports the world's web servers listen on. It does make sense to place the proxy into a DMZ, either off of a third NIC of the packet filter or by using two packet filters, one in front of the proxy and one behind it, separating the DMZ from the Internet and the internal network respectively. It could also make sense to use a non-caching security proxy, such as http-gw from the TIS FWTK, in the DMZ and employ squid in the internal network only. Cheers, Tobias

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DNS and Firewall
by Diogo Bacelar Quintela 28 Mar '01

28 Mar '01

Hello List I have a small network base on private ips and have one masquerading server. I want to specify in TCP options on the other machines the gate way machine as a dns server also.. Some abstraction.. I used to have named doing name caching for that. However now I am trying to use SuSEFirewall (or even by hand) to do that work. I mean.. All trafic from internal machines to firewall 's dns port (53) be automatically redirected (and masqueraded) to one dns server of the ISP (or both of those..) I have a cable connection and a SuSE 7.1 FTP clean installation. I believe it is SuSEfirewall 4.3 and kernel 2.4.2.. Is it possible ? I've looked and firewall's config and there are two non matching option's : port redirection (No private ips) and local port redirection (doesn't work!) TIA Diogo Quintela /------------------------------------------------------------------ || Diogo Bacelar Quintela ||----------------------------------------------------------------- || diogo.quintela(a)netcabo.pt // dbq(a)rnl.ist.utl.pt ||----------------------------------------------------------------- || PGP Public Key || http://pgpkeys.mit.edu:11371/pks/lookup?op=get&search=0x2099755D \------------------------------------------------------------------

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portscannst from many ips to port 16110
by rene marhold 27 Mar '01

27 Mar '01

Hi there is there an new trojan whos listening to port 16110??? many portscanns at my side in the last two days

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IPX firewalling
by nauber＠heidelberg.cs2-informatik.de 27 Mar '01

27 Mar '01

Hello, is it possible to have a firewall controlling both IP and IPX? IP is no problem (at least I think so :-) ), but can someone point me in the right direction to firewall IPX? I know there is nothing like this in the kernel, but is there some kind of program to controll IPX forwarding? TIA. Greetings, Stefan Nauber Administrator Cs2 Informatik GmbH Kurfürstenanlage 3 69115 Heidelberg Germany Tel.: +49 (6221) 6041-0 Fax : +49 (6221) 6041-50

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IP & MAC Filtering
by Matthias Auchmann 27 Mar '01

27 Mar '01

Hi all ! I'd like to make firewall-filtering rules where only IP Packets pass through which meet the following criterias: 1) the IP Source address is in a certain range 2) the last hop (the hop I got the packet from) has to have a certain IP or MAC-address This way I could tell my Linux Box only to accept packages which come from my Cisco-Router (on the same LAN). Any ideas how to do that ? Any help would be appreciated. Greetz Matthias _____ Sent through Master Auchi Mail Systems <http://www.masterauchi.com> - powered by Linux

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