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SIP Operation Manual
Remote Security Gateway: The IP address or FQDN of remote VPN device.
Encryption: Tunnel data encryption.
Authentication
: Authentication header and checksum.
Local ID (optional): ID field to be identified by remote VPN device (ie.
“@local-domain.com”).
Remote ID (optional): ID field to authenticate remote VPN device (ie.
“@remote-domain.com”).
Pre-shared Key: Password for VPN connection.
Perfect Forward Secrecy: Key exchange which uses a long-term key (such as the shared
secret in IKE) and generates short-term keys as required.
Key Lifetime: The next exchange key time.
ISA/KMP Key Lifetime: The keying channel connection life time.
Three steps to setup a VPN connection between two VPN VoIP gateways
Make sure in Network Setting, the LAN segment is different from the remote LAN segment. A VPN
tunnel can not be built successfully if LAN segment of two VPN end points are the same or overlap. A
static IP address for the WAN port is also necessary.
This is a sample of gateway1:
This is a sample of gateway2:
