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New Member

Restrict Outbound SMTP Traffic

I need to restrict outbound smtp traffic to internal host 192.168.1.12 I have applied the following but no success:

access-list outgoing permit tcp host 192.168.1.12 any eq smtp

access-list outgoing deny tcp host 192.168.1.0 any eq smtp

access-list outgoing permit ip any any

access-group outgoing in interface inside

1 ACCEPTED SOLUTION

Accepted Solutions
Green

Re: Restrict Outbound SMTP Traffic

Change...

access-list outgoing deny tcp host 192.168.1.0 any eq smtp

to

access-list outgoing deny tcp 192.168.1.0 255.255.255.0 any eq smtp

2 REPLIES
Green

Re: Restrict Outbound SMTP Traffic

Change...

access-list outgoing deny tcp host 192.168.1.0 any eq smtp

to

access-list outgoing deny tcp 192.168.1.0 255.255.255.0 any eq smtp

New Member

Re: Restrict Outbound SMTP Traffic

That worked, thank you much!

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