Dynamic / static





The VPN gateway Branch office initiates a VPN connection to the gateway Headquarters. Branch office has a dynamic IP address that was chosen and assigned by the Internet service provider upon dialing in, whereas Headquarters has a fixed, static address. When the connection is set up, Branch office transmits its actual IP address to Headquarters. This is accomplished by a special ICMP packet (alternatively UDP, port 87).

Entry Headquarters   Branch
Type of local IP address static dynamic
Type of remote IP address dynamic static
Name of the local device Headquarters Branch
Name of the remote site Branch Headquarters
Password for the secure transmission of the IP address confidential confidential
Shared Secret for encryption secret secret
IP address of the remote device   193.10.10.1
IP-network address of the remote network 10.10.2.0   10.10.1.0
Netmask of the remote network 255.255.255.0   255.255.255.0
Note: An ISDN line is not necessary for establishing this type of connection. The dynamic end communicates its IP address encrypted via the Internet protocol ICMP (or alternatively via UDP).

www.lancom-systems.com

LANCOM Systems GmbH | A Rohde & Schwarz Company | Adenauerstr. 20/B2 | 52146 Wuerselen | Germany | E‑Mail info@lancom.de

LANCOM Logo