[cisco-voip] ACLs for voice
Lelio Fulgenzi
lelio at uoguelph.ca
Tue Aug 2 16:04:05 EDT 2011
As mentioned in a previous thread, I'm updating our voice VLAN ACLs . I'm using 'established' entries to help out, but I'm going to assume many of the protocols are two way, so I'd like to include those where possible.
In reading the documentation, some of the requirements show what I'm pretty sure is a one way connection, i.e. Phone -> Unified CM = 2000/TCP. I take this to mean the phone picks a random TCP port and communicates to the Unified CM on port 2000 from this random port.
Others show Phone -> Unified CM = 5060/TCP,UDP and the opposite, Unified CM -> Phone = 5060/TCP,UDP.
Does this mean that the phone talks to Unified CM using port 5060 to port 5060, -or- does it mean that the phone picks a random port to talk to the Unified CM port 5060 and sometimes the Unified CM picks a random port to talk to the Phone's 5060 port?
There two different things in my opinion.
Thoughts?
Lelio
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Lelio Fulgenzi, B.A.
Senior Analyst (CCS) * University of Guelph * Guelph, Ontario N1G 2W1
(519) 824-4120 x56354 (519) 767-1060 FAX (JNHN)
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Cooking with unix is easy. You just sed it and forget it.
- LFJ (with apologies to Mr. Popeil)
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