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postfix: how to  disable ext. connections?

Posted on 2011-09-19
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Last Modified: 2012-05-12
Hello,

I have a question regards POSTFIX Software.
After installation of postfix on redhat 5.1 we can see on the Firefall side, that the server will create a connection to the ip 131.211.84.186 http;

How can we disable this outgoing connections without to enable iptables?

It should be possible to disable that in the postfix configuration?


Thanks!
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Question by:Postbank
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noci earned 400 total points
ID: 36597989
The address is from a mirror server on the uu.nl (Utrecht University in Netherlands)
These are a few of the urls going to that address... (it hosts more)
- http://archive.cs.uu.nl/
- http://www.postfix.cs.uu.nl/
To know WHAT it accesses you need the exact URL not just the IP address (especialy for HTTP which support multi website hosting)
(make a packet trace or so and look for the first few outgoing packets after SYN).

It is the main site for postfix, so parts of postfix might check for new versions?
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by:noci
ID: 36598028
I found another reference to this site: www.postfix.org..
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Author Closing Comment

by:Postbank
ID: 36908182
Thank you for explication. I think, that the reason for the outgoing connection was not a postfix, but yum update service.
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by:noci
ID: 36909312
very probable.
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