topic Re: Restrict SMTP Traffic in Network Security https://community.cisco.com/t5/network-security/restrict-smtp-traffic/m-p/1045575#M896691 <HTML><HEAD></HEAD><BODY><P>That worked, thanks a million</P></BODY></HTML> Tue, 09 Sep 2008 17:14:31 GMT rmwhite59 2008-09-09T17:14:31Z Restrict SMTP Traffic https://community.cisco.com/t5/network-security/restrict-smtp-traffic/m-p/1045573#M896688 <P>I am trying to restrict smtp traffic to be only allowed from my exchange server: 192.168.240.10</P><P></P><P>These are the access-list I used:</P><P>access-list 101 extended permit tcp host 192.168.240.10 interface outside eq smtp</P><P>access-list 101 extended deny tcp 192.168.240.0 255.255.255.0 any eq smtp</P><P>access-list 101 extended permit ip any any</P><P> It is not restricting clients from outbound smtp</P> Mon, 11 Mar 2019 13:41:34 GMT https://community.cisco.com/t5/network-security/restrict-smtp-traffic/m-p/1045573#M896688 rmwhite59 2019-03-11T13:41:34Z Re: Restrict SMTP Traffic https://community.cisco.com/t5/network-security/restrict-smtp-traffic/m-p/1045574#M896690 <HTML><HEAD></HEAD><BODY><P>How is the acl applied? If it's not I would recommend the following.</P><P></P><P>access-list 101 extended permit tcp host 192.168.240.10 any eq smtp </P><P>access-list 101 extended deny tcp 192.168.240.0 255.255.255.0 any eq smtp </P><P>access-list 101 extended permit ip any any </P><P></P><P>access-group 101 in interface inside</P></BODY></HTML> Tue, 09 Sep 2008 16:07:18 GMT https://community.cisco.com/t5/network-security/restrict-smtp-traffic/m-p/1045574#M896690 acomiskey 2008-09-09T16:07:18Z Re: Restrict SMTP Traffic https://community.cisco.com/t5/network-security/restrict-smtp-traffic/m-p/1045575#M896691 <HTML><HEAD></HEAD><BODY><P>That worked, thanks a million</P></BODY></HTML> Tue, 09 Sep 2008 17:14:31 GMT https://community.cisco.com/t5/network-security/restrict-smtp-traffic/m-p/1045575#M896691 rmwhite59 2008-09-09T17:14:31Z Re: Restrict SMTP Traffic https://community.cisco.com/t5/network-security/restrict-smtp-traffic/m-p/1045576#M896693 <HTML><HEAD></HEAD><BODY><P>Glad it worked out, please rate helpful posts in the future.</P></BODY></HTML> Tue, 09 Sep 2008 17:46:24 GMT https://community.cisco.com/t5/network-security/restrict-smtp-traffic/m-p/1045576#M896693 acomiskey 2008-09-09T17:46:24Z