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Hello,Just wondered if anyone else had successfully blocked DNS tunnels (such as NSTX or iodine) from working via DNS inspection on ASA 8.3 or newer?Whilst there is a wealth of information on how to set these up to bypass security restrictions, there...

Hi everyone.At some moment on the FWSM we have these logs: Pre-allocate SIP Via UDP secondary channel for outside:127.0.0.1/5175 to UP_direct:IP-ADD from REGISTER messageCan anyone say what does it mean? Why the source add is 127.0.0.1?Thx.

e_tizyaev by Community Member
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It is amazing how hard it is to find an answer to this question.  Even searching for "port" and "22" in the various RFC's for SSH didn't give me an answer.  I am trying to find out is if SSH sends on port 22 from the SSH client.  I know the SSH serve...

cluovpemb by Level 3
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Scenario 1On new  firewall following inspect command are as follows.Assume there is no access-list on firewall..so now all the traffic related to below protocols will be allowed to flow from inside to outside as well as outside to inside. inspect dns...

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