Hi,
Will anyone help me with the syntax needed to prevent smtp traffic leaving the lan unless its from one of the two email servers?
Is it permit host (emailserver1 IP) host any eq 25 permit host (emailserver2 IP) host any eq 25 deny host any host any eq 25
or permit host (emailserver1 IP) host any eq smtp permit host (emailserver2 IP) host any eq smtp permit host any host any eq smtp
and does it have to be an extended acl? Its a Cisco 837 by the way, with default installation OS from about 3 years ago. I'm not using the email servers to receive email directly, so I only want email to leave, I'm not using PAT to open it up to two way traffic.
Thanks in advance for your help, SW