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Configuring Network Use
3 - 13
H.460 NAT Firewall Traversal
You can configure V500 systems to use standards-based H.460.18 and
H.460.19 firewall traversal, which allows video systems to more easily
establish IP connections across firewalls.
The following illustration shows how a service provider might provide H.460
firewall traversal between two enterprise locations. In this example the V
2
IU™
traversal server gateway is on the edge of the service provider network and
facilitates IP calls between systems behind different firewalls.
To use this traversal, V500 systems and firewalls must be configured as
follows:
• Enable firewall traversal on the V500 system.
• Register the V500 system to an external V
2
IU Traversal Server Gateway
that supports the H.460.18 and H.460.19 standards.
• Make sure that firewalls being traversed allow V500 systems behind them
to open outbound TCP and UDP connections.
— Firewalls with a stricter rule set should allow V500 systems to open at
least the following outbound TCP and UDP ports: 1720 (TCP),
14085-15084 (TCP) and 1719(UDP), 16386-25386 (UDP).
— Firewalls should permit inbound traffic to TCP and UDP ports that
have been opened earlier in the outbound direction.
• For best interoperability, make sure that H.323 protocol-aware features are
disabled on firewalls being traversed.
Gatekeeper
IP Network
System with
Enterprise Location A
Enterprise Location B
Service Provider
V 2 IU Server Gateway
Traversal Enabled
System with
Traversal Enabled
that Supports H.460.18
and H.460.19