Stupid Cisco ACL question
Jay Ford
jay-ford at uiowa.edu
Thu Apr 21 19:20:09 UTC 2011
On Thu, 21 Apr 2011, up at 3.am wrote:
> permit tcp any eq 443 any
> permit tcp any eq 80 any
> deny ip any host 2.2.3.4
> permit ip any any
>
> This is applied to an inbound interface(s). We want anybody outside to be
> able to reach ports 80 and 443 of any host on our network, no matter what,
> then block ALL other access to select hosts, such as 2.2.3.4, even ICMP.
> However, as soon as I apply this rule to the interface, ports 80 and 443
> of that host become unreachable. A telnet to 2.2.3.4 443 gets "Connection
> refused" until I tear out the deny ACL above. I even tried adding udp for
> both ports, to no avail.
Your ACL is apply the 80 & 443 as source ports, not destination ports.
You probably want:
permit tcp any any eq 443
permit tcp any any eq 80
deny ip any host 2.2.3.4
permit ip any any
________________________________________________________________________
Jay Ford, Network Engineering Group, Information Technology Services
University of Iowa, Iowa City, IA 52242
email: jay-ford at uiowa.edu, phone: 319-335-5555, fax: 319-335-2951
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