Nortel 4134 用户指南
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Firewall and NAT Fundamentals
Figure 3
SIP trunk side and line side
SIP trunk side and line side
Line-side SIP traffic translation
Figure 4
MCS PC client behind firewall/NAT
MCS PC client behind firewall/NAT
SIP line side traffic refers to traffic that flows between a SIP call server
and an IP phone.
and an IP phone.
Line side traffic is triggered when the source port or destination port of the
packet is the well-known SIP port, 5060. The SIP ALG translates the private
IP address and port of the internal client in the outgoing SIP message body
packet is the well-known SIP port, 5060. The SIP ALG translates the private
IP address and port of the internal client in the outgoing SIP message body
Nortel Secure Router 4134
Security — Configuration and Management
NN47263-600
01.02
Standard
10.0
3 August 2007
Copyright © 2007, Nortel Networks
.