Question

How do I create an access list which denies smtp to all nodes except the email server?

Asked by: aramirez-1

How do I create an access list which denies smtp to all nodes except the email server?

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Asked On
2009-07-02 at 13:55:11ID24540905
Topic

Network Routers

Participating Experts
2
Points
500
Comments
2

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Answers

 

by: nasirshPosted on 2009-07-03 at 02:44:47ID: 24771188

access-list 10 permit tcp host E-Mail Server any eq 25
access-list 10 deny tcp any any

 

by: lrmoorePosted on 2009-07-05 at 12:35:59ID: 24781066

That'll deny a lot more than email, and you can't use a standard acl number, it has to be extended number range.

Assuming that you are applying this to an inbound interface:

access-list 110 permit tcp any host <mail server ip> eq 25
access-list 110 deny tcp any any eq 25
access-list 110 permit ip any any

20120131-EE-VQP-002

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