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Community Member

IOS Access List blocking TCP Ports 139 and 445

I recently put an IOS access list on my 2600 router blocking TCP ports 139 and 445, which basically worked as advertised. An unintentional side effect of this access list was to disable incomming ICMP (ping) traffic as well. I have spent some time trying to figure out why this is happening, with almost no success. Would an ICMP permit statement ahead of the tcp deny statements in the ACL resolve this problem? Additionally why would ICMP be using these ports?

2 REPLIES
Community Member

Re: IOS Access List blocking TCP Ports 139 and 445

Hi

Can you post the config on here?

Thanks Jonathan

Community Member

Re: IOS Access List blocking TCP Ports 139 and 445

Yes, I will post the essentials of the config. Most likely 24 Oct 05.

Best regards,

Ian.

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