Internet connection slow where is Zimbra server

[mauroreggio]

Hi all,
i've installed about 3 Zimbra server 5.0.2 (open source version) on Fedora Core 7 Box.
This 3 server are in 3 different building in different zone.
After some months from the installation, in all 3 the place i've problem with the Internet connection.
The server are on the same Internet connection that the internal building lan use for the normal internet surfing, naturally the Zimbra server are on public IP address in public lan or in DMZ.
If i power off the Zimbra server, the Internet performance become normal, after some minutes that the server is powered-on, the internet connection become very slow.
Is like the Zimbra server use many of the internet bandwith for it's purpose.
I check in the server queue, but all appears good, no messages in bounce or not full queue.
Anyone have the same problem and have find one solution?
Thanks very much at all,
regards,
Mauro.

[uxbod]

Check /var/log/zimbra.log and see how many connections are being made to the SMTP service. Can you not throttle the bandwidth on your router ? you could also look at using TC to manage your bandwidth.

[mauroreggio]

Thanx uxbod,
i check and i saw about 5-6 connection at minutes:

Nov 18 16:58:05 marte postfix/smtpd[12082]: connect from unknown[151.12.160.14]
Nov 18 16:58:06 marte postfix/smtpd[12082]: disconnect from unknown[151.12.160.14]
Nov 18 16:58:06 marte postfix/smtpd[14791]: connect from localhost.localdomain[127.0.0.1]
Nov 18 16:58:06 marte postfix/smtpd[14791]: disconnect from localhost.localdomain[127.0.0.1]
Nov 18 16:58:24 marte postfix/smtpd[25427]: connect from pelvis.netscalibur.it[62.196.3.15]
Nov 18 16:58:25 marte postfix/smtpd[25427]: disconnect from pelvis.netscalibur.it[62.196.3.15]
Nov 18 16:58:25 marte postfix/smtpd[19028]: connect from localhost.localdomain[127.0.0.1]
Nov 18 16:58:25 marte postfix/smtpd[19028]: disconnect from localhost.localdomain[127.0.0.1]
Nov 18 16:58:30 marte postfix/smtpd[28243]: connect from 189-74-135-63.cable.viacabocom.com.br[189.74.135.63]
Nov 18 16:58:43 marte postfix/smtpd[14791]: connect from localhost.localdomain[127.0.0.1]
Nov 18 16:58:43 marte postfix/smtpd[14791]: disconnect from localhost.localdomain[127.0.0.1]
Nov 18 16:58:45 marte postfix/smtpd[28243]: disconnect from 189-74-135-63.cable.viacabocom.com.br[189.74.135.63]
Nov 18 16:58:47 marte postfix/smtpd[12082]: connect from unknown[88.247.139.70]
Nov 18 16:58:51 marte postfix/smtpd[12082]: disconnect from unknown[88.247.139.70]
Nov 18 16:58:53 marte postfix/smtpd[19028]: connect from localhost.localdomain[127.0.0.1]
Nov 18 16:58:53 marte postfix/smtpd[19028]: disconnect from localhost.localdomain[127.0.0.1]
Nov 18 16:58:53 marte postfix/smtpd[25427]: connect from unknown[88.247.139.70]
Nov 18 16:58:59 marte postfix/smtpd[12082]: connect from unknown[123.238.62.81]
Nov 18 16:59:01 marte postfix/smtpd[14791]: connect from localhost.localdomain[127.0.0.1]
Nov 18 16:59:01 marte postfix/smtpd[14791]: disconnect from localhost.localdomain[127.0.0.1]
Nov 18 16:59:03 marte postfix/smtpd[12082]: lost connection after RCPT from unknown[123.238.62.81]
Nov 18 16:59:03 marte postfix/smtpd[12082]: disconnect from unknown[123.238.62.81]
Nov 18 16:59:05 marte postfix/smtpd[25427]: disconnect from unknown[88.247.139.70]
Nov 18 16:59:13 marte postfix/smtpd[28243]: connect from unknown[201.53.53.115]
Nov 18 16:59:14 marte postfix/smtpd[12082]: connect from unknown[77.125.91.210]
Nov 18 16:59:20 marte postfix/smtpd[28243]: disconnect from unknown[201.53.53.115]
Nov 18 16:59:38 marte postfix/smtpd[25427]: connect from c-98-240-194-242.hsd1.mn.comcast.net[98.240.194.242]
Nov 18 16:59:43 marte postfix/smtpd[28243]: connect from marte.netsphere.it[192.168.0.1]
Nov 18 16:59:43 marte postfix/smtpd[28243]: disconnect from marte.netsphere.it[192.168.0.1]
Nov 18 16:59:44 marte postfix/smtpd[19028]: connect from localhost.localdomain[127.0.0.1]
Nov 18 16:59:44 marte postfix/smtpd[19028]: disconnect from localhost.localdomain[127.0.0.1]
Nov 18 16:59:58 marte postfix/smtpd[14791]: connect from localhost.localdomain[127.0.0.1]
Nov 18 16:59:58 marte postfix/smtpd[14791]: disconnect from localhost.localdomain[127.0.0.1]
Nov 18 16:59:58 marte postfix/smtpd[12082]: disconnect from unknown[77.125.91.210]
Nov 18 17:00:06 marte postfix/smtpd[28243]: connect from smtp-gw79.mailanyone.net[208.70.128.105]
Nov 18 17:00:06 marte postfix/smtpd[28243]: disconnect from smtp-gw79.mailanyone.net[208.70.128.105]
Nov 18 17:00:07 marte postfix/smtpd[19028]: connect from localhost.localdomain[127.0.0.1]
Nov 18 17:00:07 marte postfix/smtpd[19028]: disconnect from localhost.localdomain[127.0.0.1]
Nov 18 17:00:23 marte postfix/smtpd[25427]: disconnect from c-98-240-194-242.hsd1.mn.comcast.net[98.240.194.242]
Nov 18 17:00:23 marte postfix/smtpd[14791]: connect from localhost.localdomain[127.0.0.1]
Nov 18 17:00:23 marte postfix/smtpd[14791]: disconnect from localhost.localdomain[127.0.0.1]
Nov 18 17:00:34 marte postfix/smtpd[12082]: connect from unknown[151.12.160.14]
Nov 18 17:00:36 marte postfix/smtpd[12082]: disconnect from unknown[151.12.160.14]
Nov 18 17:00:37 marte postfix/smtpd[19028]: connect from localhost.localdomain[127.0.0.1]
Nov 18 17:00:37 marte postfix/smtpd[19028]: disconnect from localhost.localdomain[127.0.0.1]


i think is normal, not many.
Yes, i can manage the bandwith with Cisco router or ASA or any traffic control, but ... is normal that the server use all this bandwith?
Normally postfix server not need all this.
Thanks,
Mauro.

[uxbod]

Well Im on DSL and don't have any issues with ZCS and bandwidth. If you have got a ASA then you could see what protocols are going into and out of your server. Just a "its slow when in use" does not really indicate where the issue is.

[mauroreggio]

Ok, i only ask if anyone have the same truble before investigate much more. This because i see the same truble in all the 3 place where i've Zimbra.
If no anyone have see the same, i'm glad to post here if i find anything other of intresting.
Thanks much,
Mauro.