Mailinglist Archive: opensuse-security (228 mails)

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Re: [suse-security] Problem with SuSEfirewall and Postfix SMTP?
  • From: John Fawcett <johnml@xxxxxxxxxxxx>
  • Date: Sat, 19 Mar 2005 09:18:10 +0100
  • Message-id: <423BE042.7030805@xxxxxxxxxxxx>
Jürgen Mell wrote:
In the logs the problem looks like this:

Mar 17 20:11:32 pluto postfix/smtpd[8647]: < mforward.dtag.de[194.25.242.123]: QUIT
Mar 17 20:11:32 pluto postfix/smtpd[8647]: > mforward.dtag.de[194.25.242.123]: 221 Bye
Mar 17 20:11:32 pluto postfix/smtpd[8647]: disconnect from mforward.dtag.de[194.25.242.123]
Mar 17 20:11:32 pluto postfix/smtpd[8647]: connect from mforward.dtag.de[194.25.242.123]
Mar 17 20:11:32 pluto postfix/smtpd[8647]: > mforward.dtag.de[194.25.242.123]: 220 pluto.br-tech.de ESMTP Postfix
Mar 17 20:11:32 pluto postfix/smtpd[8647]: watchdog_pat: 0x80a18b8
Mar 17 20:12:20 pluto postfix/smtpd[8639]: > mforward.dtag.de[194.25.242.123]: 421 pluto.br-tech.de Error: timeout exceeded
Mar 17 20:12:20 pluto postfix/smtpd[8639]: timeout after END-OF-MESSAGE from mforward.dtag.de[194.25.242.123]
Mar 17 20:12:20 pluto postfix/smtpd[8639]: disconnect from mforward.dtag.de[194.25.242.123]
Mar 17 20:12:20 pluto postfix/smtpd[8639]: connect from mforward.dtag.de[194.25.242.123]
Mar 17 20:12:20 pluto postfix/smtpd[8639]: > mforward.dtag.de[194.25.242.123]: 220 pluto.br-tech.de ESMTP Postfix
Mar 17 20:12:20 pluto postfix/smtpd[8639]: watchdog_pat: 0x80a18b8
Mar 17 20:12:35 pluto postfix/smtpd[8649]: > mforward.dtag.de[194.25.242.123]: 421 pluto.br-tech.de Error: timeout exceeded
Mar 17 20:12:35 pluto postfix/smtpd[8649]: timeout after END-OF-MESSAGE from mforward.dtag.de[194.25.242.123]
Mar 17 20:12:35 pluto postfix/smtpd[8649]: disconnect from mforward.dtag.de[194.25.242.123]
Mar 17 20:12:35 pluto postfix/smtpd[8649]: connect from mforward.dtag.de[194.25.242.123]
Mar 17 20:12:35 pluto postfix/smtpd[8649]: > mforward.dtag.de[194.25.242.123]: 220 pluto.br-tech.de ESMTP Postfix
Mar 17 20:12:35 pluto postfix/smtpd[8649]: watchdog_pat: 0x80a18b8
Mar 17 20:12:35 pluto postfix/smtpd[8649]: smtp_get: EOF
Mar 17 20:12:35 pluto postfix/smtpd[8649]: lost connection after CONNECT from mforward.dtag.de[194.25.242.123]
Mar 17 20:12:35 pluto postfix/smtpd[8649]: disconnect from mforward.dtag.de[194.25.242.123]
Mar 17 20:12:35 pluto postfix/smtpd[8649]: connect from mforward.dtag.de[194.25.242.123]
Mar 17 20:12:35 pluto postfix/smtpd[8649]: > mforward.dtag.de[194.25.242.123]: 220 pluto.br-tech.de ESMTP Postfix
Mar 17 20:12:35 pluto postfix/smtpd[8649]: watchdog_pat: 0x80a18b8
Mar 17 20:12:35 pluto postfix/smtpd[8649]: smtp_get: EOF

From this point on, none of the smtpd daemons got a connection.

it looks as though the remote server stops sending further messages and just times out. Further connections from the remote server don't send any data.

On a server with enough smtpd processes configured, this
wouldn't be a problem. Did you see Mark Samendinger's reply?

John

It's a bit of a problem right now. All the mails have been sent and right now everything works well again. I will try to reproduce the problem on the weekend, for the next outage will come for sure...

Thanks,

Jürgen


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