Check your reverse dns.


Regards,
Marc


-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: 10 January 2001 11:40
To: [EMAIL PROTECTED]
Cc: Holger Greindl
Subject: smtp-connect delays about 30 seconds


Hi,

sorry if this kind of problem has been posted before, but I didn't know
right how to find the right solution and it is urgent.

I have RH6.2 running as mailserver with Exim 3.20 as MTA. The system is
located
in front of a firewall which translates our internal IP-addresses into one
official one.
The mailserves has also an official IP and uses the DNS server of our
provider for
address-resolution.

The problem: Everytime a user wants to send mail it takes about 30 seconds
to get
a smtp-connection from the the (NT-)workstations to the mailserver.
According to
the Exim log-file there is no problem but when I run tcpdump on the machine
I found a strange delay and I not even know what happens there :-(((

Further down comes the output of tcpdump - apollo is the mailserver, fwint
the firewall.
I'd appreciate any help. I am really blank how I shpuld get rid of this
delay and
the people getting angry...

Best regards,
Michael

tcpdump: listening on eth0
14:37:11.263039 FwInt.klumpp.de.61333 > apollo.klumpp.de.smtp: 
  S1417123735:1417123735(0) win 32120 <mss 1460,sackOK,timestamp 
  86409152[|tcp]> (DF) (ttl 63, id 8916)
14:37:11.263136 apollo.klumpp.de.smtp > FwInt.klumpp.de.61333: 
  S2295099218:2295099218(0) ack 1417123736 win 30660 <mss
  1460,nop,nop,sackOK,nop,wscale 0> (DF) (ttl 64, id 30710)
14:37:11.264309 FwInt.klumpp.de.61333 > apollo.klumpp.de.smtp: 
  . ack 1 win 32120 (DF) (ttl 63, id 8917)
14:37:16.258483 arp who-has apollo.klumpp.de tell FwInt.klumpp.de
14:37:16.258526 arp reply apollo.klumpp.de is-at 0:0:1c:b5:b3:bc
14:37:41.265312 apollo.klumpp.de.1296 > dns1.riodata.de.domain: 
  18237+ (47) (ttl 64, id 30719)
14:37:41.268503 apollo.klumpp.de.1297 > dns1.riodata.de.domain: 
  18497+ (43) (ttl 64, id 30720)
14:37:41.424769 dns1.riodata.de.domain > apollo.klumpp.de.1298: 
  18239 NXDomain* q: 51.146.16.62. 0/1/0 (130) (ttl 24, id38492)
14:37:41.425528 apollo.klumpp.de.smtp > FwInt.klumpp.de.61333: 
  P1:74(73) ack 1 win 32120 (DF) (ttl 64, id 30723)
14:37:41.426845 FwInt.klumpp.de.61333 > apollo.klumpp.de.smtp: 
  . ack 74 win 32120 (DF) (ttl 63, id 8918)



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