Inetd and pop3d problem

Inetd and pop3d problem

Post by Brian Arno » Thu, 21 Mar 1996 04:00:00



Background:

        ISP running Web/FTP/Mail from a Dec Starion P90,
32MB RAM, 2.3GB Disk, 3C509 Twisted Pair E card. Linux kernel
1.2.13, 12 virtual IP addresses on eth0. Max socket connections
set to 1024.

        What I've got is this: My pop3d server seems to be acting
up. Every so often, gaurenteed more than once a day, but not
reliable in terms of time or interval, POP clients cannot
connect. They are all (or almost all) using Eudora Light, 1.5.2,
And they get 'Error reading from network' messages. DNS is
resolving the mail host name, they get stuck on 'Logging into
POP server'.

        I have the in.pop3d debugging on and see nothing strange.
I have perused kernel,daemon,mail,messages, and syslog logs to
see if any other information is being spit out which might help,
but it is not. All I can say for certain, is that if I kill -HUP
`cat /var/run/inetd.pid`, the problem clears up instantly.  

        I don't think that I am hitting the 1024 socket limit,
because I can still establish telnet and FTP, although if inetd
is really crapping out, shouldnt these be a problem too?

        Really got me stumped, and it needs to be resolved. A 5
minute 'kick_inetd' script which issues the kill is ok for a
workaround, but I sure would like to get to the bottom, and I'm
just not sure where to look next.

Brian Arnold, President/CEO
Sirius Systems Group

 
 
 

Inetd and pop3d problem

Post by Baris Cenberc » Thu, 04 Apr 1996 04:00:00



>         What I've got is this: My pop3d server seems to be acting
> up. Every so often, gaurenteed more than once a day, but not
> reliable in terms of time or interval, POP clients cannot
> connect. They are all (or almost all) using Eudora Light, 1.5.2,
> And they get 'Error reading from network' messages.

We've faced a similar problem before.

Check /var/spool/mail/ . If the mail files are not owned as owner.group
(it may be something like (mail.root) or etc) your clients will not be
able to receive mails. I know it sounds stupid but some distributions
has this bug.

B.C.
:{)*

 
 
 

1. inetd/pop3d and reverse lookup?

Does anyone know if it's possible to prevent inetd (or pop3d) from
doing reverse lookups on incoming connections? This isn't always feasible
when the DNS is on "the wrong side" of a BRI...

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