Restrict SMTP Traffic

Answered Question
Sep 9th, 2008
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I am trying to restrict smtp traffic to be only allowed from my exchange server: 192.168.240.10


These are the access-list I used:

access-list 101 extended permit tcp host 192.168.240.10 interface outside eq smtp

access-list 101 extended deny tcp 192.168.240.0 255.255.255.0 any eq smtp

access-list 101 extended permit ip any any

It is not restricting clients from outbound smtp

Correct Answer by acomiskey about 8 years 8 months ago

Glad it worked out, please rate helpful posts in the future.

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acomiskey Tue, 09/09/2008 - 09:07
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How is the acl applied? If it's not I would recommend the following.


access-list 101 extended permit tcp host 192.168.240.10 any eq smtp

access-list 101 extended deny tcp 192.168.240.0 255.255.255.0 any eq smtp

access-list 101 extended permit ip any any


access-group 101 in interface inside

Correct Answer
acomiskey Tue, 09/09/2008 - 10:46
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Glad it worked out, please rate helpful posts in the future.

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