[SLE] Port Connection Question
Hi all. I've run into a problem with Sendmail on my 6.3 box. The box won't let me telnet into port 25 from any other box. I don't know if this is a Sendmail problem, or something else. I can telnet in normally, but if I try port 25 from anywhere else it gets a connection refused. The Sendmail daemon is running, it reports that it is accepting connections on port 25. I've uncomments the like from the inetd.conf to allow it to be run there. Does anyone have any idea what else to try? Thanks, Lee -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/support/faq
Hi all. I've run into a problem with Sendmail on my 6.3 box. The box won't let me telnet into port 25 from any other box. I don't know if this is a Sendmail problem, or something else. I can telnet in normally, but if I
try
port 25 from anywhere else it gets a connection refused. The Sendmail daemon is running, it reports that it is accepting connections on port 25. I've uncomments the like from the inetd.conf to allow it to be run there. Does anyone have any idea what else to try?
Thanks, Lee
Do you have it running under tcp wrappers? You might want to consider running it as a stand alone daemon, this way it doesn't have to keep respawning for each email that is coming in. The bad thing about running it as a stand alone daemon means that anyone can connection to your mail server (but not nessically relay though it), but has better performance. http://www.sendmail.org/faq/section2.html#2.15 If you only want certain hosts to connection, try something like this in "/etc/hosts.allow" (this is with sendmail running from inetd with tcpwrappers) # Internal Network can Connect to sendmail sendmail:192.168.17. # Other trusted host that can connection to sendmail sendmail:trusted.secure.com and in "/etc/hosts.deny" have something like this: # Deny all other connections to sendmail by default sendmail:ALL But if you do this and someone from outside of this (say hotmail.com for example) won't be able to pass you email. So if bob@hotmail.com sends email to you@yourmailserver.com they will get an error saying it couldn't connect or send mail to that server. In the config above, this is most likely be used as an "internal mail server" where people can pass email on the LAN. Also since you are running 6.3, I would recommened that you upgrade to the lastest version of Sendmail (8.11.0 IIRC) and also the lastest 2.2.16 kernel for security reasons. Also after you setup you probably will need this: http://www.sendmail.org/faq/section3.html#3.27 Jack -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/support/faq
Can you send me your sendmail.conf configuration??? just for because, i need to configure my system for not accept telnet to port 25 :) regards, jbarnett@axil.netmate.com escribe:
Hi all. I've run into a problem with Sendmail on my 6.3 box. The box won't let me telnet into port 25 from any other box. I don't know if this is a Sendmail problem, or something else. I can telnet in normally, but if I try port 25 from anywhere else it gets a connection refused. The Sendmail daemon is running, it reports that it is accepting connections on port
I've uncomments the like from the inetd.conf to allow it to be run there. Does anyone have any idea what else to try?
Thanks, Lee
Do you have it running under tcp wrappers?
You might want to consider running it as a stand alone daemon, this way it doesn't have to keep respawning for each email that is coming in. The bad thing about running it as a stand alone daemon means that anyone can connection to your mail server (but not nessically relay though it), but has better performance.
_________________________________ Atte, Roberto Poblete / email: roberto@orion.cl fono: 6403943 / Fax: 6403990 Orion 2000 Servicios Profesionales en Seguridad Informática -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/support/faq
Can you send me your sendmail.conf configuration???
just for because, i need to configure my system for not accept telnet to port 25 :)
regards,
Sorry but I don't have it on me at the moment. If you installed from source you can recreate a config file by this: #!/bin/sh cd /SOMEDIR/sendmail-8.11.0/cf/cf/ m4 /SOMEDIR/sendmail-8.11.0/cf/m4/cf.m4 config.mc > config.cf cp /etc/mail/sendmail.cf /etc/mail/sendmail.cf.back cp ./config.cf /etc/mail/config.cf exit() Where SOMEDIR is wherever you untared the sendmail source at (probably your home directory or /tmp) http://www.sendmail.org/m4/intro.html What are you having problems configuring? Also did you get your connection problem worked out? I don't think your sendmail.cf file has any relation to your telnet connection refused to port 25. Look in "/etc/inetd.conf" does sendmail have something like "/usr/sbin/tcpd" in that line? If so, it is going to be a tcpwrappers problem. Jack
jbarnett@axil.netmate.com escribe:
Hi all. I've run into a problem with Sendmail on my 6.3 box. The box won't let me telnet into port 25 from any other box. I don't know if this is a Sendmail problem, or something else. I can telnet in normally, but if
I
port 25 from anywhere else it gets a connection refused. The Sendmail daemon is running, it reports that it is accepting connections on port
I've uncomments the like from the inetd.conf to allow it to be run
try 25. there.
Does anyone have any idea what else to try?
Thanks, Lee
Do you have it running under tcp wrappers?
You might want to consider running it as a stand alone daemon, this way it doesn't have to keep respawning for each email that is coming in. The bad thing about running it as a stand alone daemon means that anyone can connection to your mail server (but not nessically relay though it), but has better performance.
_________________________________ Atte, Roberto Poblete / email: roberto@orion.cl fono: 6403943 / Fax: 6403990 Orion 2000 Servicios Profesionales en Seguridad Informática
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Can you use Linux as an application server to store apps on one computer and run them over a network on another? I know in Win&*$#, you always get errors on missing .dlls because they are not locally installed. Is this the same in linux? If not, what do I need to set one up. Thanx. -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/support/faq
On Thu, 10 Aug 2000, Andrew M. wrote: am> am> Can you use Linux as an application server to store apps on one computer am> and run them over a network on another? I know in Win&*$#, you always am> get errors on missing .dlls because they are not locally installed. Is am> this the same in linux? If not, what do I need to set one up. am> In windows, you can use citrix metaframe, which will distribute windows programs to windows, macintohs and linux workstations. I also believe vnc does the same thing, but can also be run from a linux server. I can't remember if I'm thinking of the right program, but I believe it's vnc so someone correct me if I'm wrong. am> am> Thanx. am> am> -- S.Toms - tomas@primenet.com - www.primenet.com/~tomas SuSE Linux v6.4+ - Kernel 2.2.16 She's genuinely bogus. -- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/support/faq
Yes you can do this by installing the app to a common dir thaat is always mounted to the same mount piont. If its multi user amke sure tha app is also multi user. I keep the programs localy and leave the data on the server as this is better for app prefromance. At 08:25 PM 8/10/2000 -0400, Andrew M. wrote:
Can you use Linux as an application server to store apps on one computer and run them over a network on another? I know in Win&*$#, you always get errors on missing .dlls because they are not locally installed. Is this the same in linux? If not, what do I need to set one up.
Thanx.
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Also check the FAQ at http://www.suse.com/support/faq
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Given how incredibly inexpensive hard drives are, why are you doing this? Are you using legacy hardware with tight disk space, or are you concerned about performing upgrades to each software package, or are you concerned about central configuration? That determines the appropriate answer. You can do it by setting up NFS to allow the server host to export the filesystem(s) containing the applications and their libraries. Then set the LD_LIBRARY_PATH to include the appropriate library directories on the remote hosts. Note that many programs look for local configuration files. If you're going to go this route, you'll either still have to be dependent upon some local state and configuration or you'll have to do almost everything over the network, losing performance. Understanding your objectives here would help. --steve augart "Andrew M." wrote:
Can you use Linux as an application server to store apps on one computer and run them over a network on another? I know in Win&*$#, you always get errors on missing .dlls because they are not locally installed. Is this the same in linux? If not, what do I need to set one up.
Thanx.
-- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/support/faq
-- To unsubscribe send e-mail to suse-linux-e-unsubscribe@suse.com For additional commands send e-mail to suse-linux-e-help@suse.com Also check the FAQ at http://www.suse.com/support/faq
participants (7)
-
armains＠channel1.com -
jbarnett＠axil.netmate.com -
lfent＠esker.com -
roberto＠orion.cl -
samelash＠ix.netcom.com -
steve＠augart.com -
tomas＠primenet.com