10-12-2004 01:54 AM - edited 03-02-2019 07:10 PM
Hi
I would like to Block VOIP traffic on my Upstream Routers, Anyone with any readings on this effect will be very helpful
thanks
KM
10-12-2004 01:29 PM
Voip uses random UDP ports ranging from 16384 through 32767. If this is H323 signalling, then also block 1720 TCP port.
10-12-2004 05:32 PM
H323
tcp - 1719/1720
SIP
tcp - 5060/5061
10-14-2004 08:03 PM
I don't have any particular reading references, but you can use normal ACLs for this purpose.
Thx,
CH
10-15-2004 05:56 AM
Just to add to what has already been suggested here...
You'll definately want to block RTP / RTCP (UDP 16384 - 32767) as Shanky suggests. But, here are some additional ports used by various VoIP protocols you can block as well.
H.323/H.245 = TCP 11xxx (Standard Connect)
H.323/H.245 = TCP 1720 (Fast Connect)
H.323/H.225 RAS = TCP 1719
Skinny = TCP 2000-2002 (CM Encore)
ICCP = TCP 8001-8002 (CM Encore)
MGCP = UDP 2427, TCP 2428 (CM Encore)
SIP = UDP 5060, TCP 5060 (configurable)
Hope this helps,
-Geoff
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