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Many routers provide an ALG on port 21 to listen on FTP commands to sniff out the port that needs to be open for active mode to work. However, that only works on port 21 in most causes.... so it doesn't work on non-standard ftp ports. Your can se...
The access point can discover controllers through your domain name server (DNS). For the access point to do so, you must configure your DNS to return controller IP addresses in response to CISCO-LWAPP-CONTROLLER.localdomain, where localdomain is the ...
Symptom SIP INVITE messages sent to a router where the SIP URI and To header contain a number that begins with the plus sign (+) (e.g. +1919555xxxx), do not match valid dial peers that have a + (e.g. destination-pattern +1919.......). Conditions ...
The CAB-C19-CBN is published as an option for the 4500, 6500s and the MDS9509, as a 250VAC, 16A cable.It won't support for 2800w.http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/hardware/catalyst4500e/installation/guide/02pspg.html
When a user sends a message to a server from inside a NAT, the server will reflect back whatever address the NAT gives it. STUN allows this reflected address to be used to establish an RTP session with the user inside the NAT, without involving any o...
