topic Re: error in Operating System - HP-UX

error

Swats — Mon, 07 Apr 2008 09:54:37 GMT

HI,

Customers are getting a lot of "Too many connections" errors from the SMTP server.

Can anybody give me solution for this as why is he geting this error

Re: error

Steven E. Protter — Mon, 07 Apr 2008 09:59:12 GMT

Shalom,

Sendmail has a built in limit to how many simultaneous connections it will tolerate.

It also will not accept connections if system load factor exceeds 25.

I'd try and look at your logs to see why there are so many connections. /var/adm/syslog/mail.log

I'd also check system load factor. Your system may be under denial of service or spam attack.

SEP

Re: error

Swats — Tue, 08 Apr 2008 08:49:42 GMT

Thank you for your response

Can you tell me as which variable or file where the Sendmail limited connections value is defined and also how to verify whether the connections has crossed that limit.

Re: error

Yogeeraj_1 — Tue, 08 Apr 2008 08:55:30 GMT

hi,

see: /etc/mail/sendmail.cf

...
# Queue-Only Load Average (option QueueLA): #
# #
# In order to limit load on a very busy system, sendmail can be #
# configured to queue up low priority messages rather than attempt #
# delivery immediately if the five-minute load average is greater #
# than some integer value, by default 8. This value is defined on #
# the line beginning O QueueLA=. #
# #
# Refuse-Connections Load Average (option RefuseLA): #
# #
# In order to limit load on a very busy system, the sendmail daemon #
# can be configured not to accept SMTP connections if the five- #
# minute load average is greater than some integer value, by #
# default 12. This value is defined on the line beginning #
# O RefuseLA=. #
...

hope this helps!
kind regards
yogeeraj

Re: error

Swats — Wed, 09 Apr 2008 08:27:44 GMT

Thanks for your suggetion.

But that file is commented will it allow me to modify it. Or is there any other option If yes pls let me know.

Re: error

Dennis Handly — Wed, 09 Apr 2008 09:03:53 GMT

>But that file is commented will it allow me to modify it?

Sure. You'll have to restart sendmail afterwards.