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2820 SMTP filtering

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28 Apr 2011 10:15 #67500 by opsops
2820 SMTP filtering was created by opsops
Hi,

Is it possible to set a filter up to stop SMTP traffic from anything other than our mailserver on the network, I have set up a filter, but I can still telnet and send mail to port 25 from another machine on my network.



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28 Apr 2011 10:22 #67501 by nealuk
Replied by nealuk on topic Re: 2820 SMTP filtering
you've set the "smtp out" Source IP to any - if you make that your local mailserver that should help

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28 Apr 2011 10:32 #67502 by opsops
Replied by opsops on topic Re: 2820 SMTP filtering

nealuk wrote: you've set the "smtp out" Source IP to any - if you make that your local mailserver that should help




thanks very much that worked !!!

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05 May 2011 15:17 #67606 by opsops
Replied by opsops on topic Re: 2820 SMTP filtering
I have set up the filters to block if no further match on port 25 any destination from any port and any ip source. I then set another rule in the same filter to allow from source ip 192.168.6.3 from any port to destination port 25.

The thing is when I have this filter enabled I cant telnet to my relay server on port 25 but with it disabled I can telnet no problem.

Its doing my head in now, does anyone know where I am going wrong?



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