Cisco Systems RVS4000RF manual IPSec Setup, Phase

Setting Up and Configuring the Router	5
VPN

domain name in the Domain Name field. Then select either IP Address or IP by DNS Resolved from the drop-down menu, and fill in the IP Address field or Domain Name field.

Remote Security Group Type Select the remote LAN user(s) behind the remote gateway who can use this VPN tunnel. This may be a single IP address or a Sub- network. Note that the Remote Security Group Type must match the other router’s Local Security Group Type.

IP Address Enter the IP address on the remote network.

Subnet Mask If the Remote Security Group Type is set to Subnet, enter the mask to determine the IP addresses on the remote network.

IPSec Setup

Keying Mode The router supports both automatic and manual key management. When choosing automatic key management, IKE (Internet Key Exchange) protocols are used to negotiate key material for SA (Security Association). If manual key management is selected, no key negotiation is needed. Basically, manual key management is used in small static environments or for troubleshooting purposes. Note that both sides must use the same Key Management method.

Phase 1

•Encryption The Encryption method determines the length of the key used to encrypt/decrypt ESP packets. Only 3DES is supported. Notice that both sides must use the same Encryption method.

•Authentication Authentication determines a method to authenticate the ESP packets. Either MD5 or SHA1 may be selected. Notice that both sides (VPN endpoints) must use the same Authentication method.

•MD5 A one-way hashing algorithm that produces a 128-bit digest.

•SHA1 A one-way hashing algorithm that produces a 160-bit digest.

•Group The Diffie-Hellman (DH) group to be used for key exchange. Select the 768-bit (Group 1), 1024-bit (Group 2), or 1536-bit (Group 5) algorithm. Group 5 provides the most security, Group 1 the least.

•Key Life Time This specifies the lifetime of the IKE-generated key. If the time expires, a new key is renegotiated automatically. Enter a value from 300 to 100,000,000 seconds. The default is 28800 seconds.

Phase 2

Cisco RVS4000 Security Router with VPN Administrator Guide 62