ZyXEL P-792H v2 User Guide - Page 161
Security > VPN > Setup > Edit
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Chapter 12 VPN Table 44 Security > VPN > Setup > Edit LABEL DESCRIPTION NAT Traversal This function is available if the VPN Protocol is ESP. Name IPSec Key Mode Negotiation Mode Encapsulation Mode DNS Server (for IPSec VPN) Select this check box if you want to set up a VPN tunnel when there are NAT routers between the P-792H v2 and remote IPSec router. The remote IPSec router must also enable NAT traversal, and the NAT routers have to forward UDP port 500 packets to the remote IPSec router behind the NAT router. Type up to 32 characters to identify this VPN policy. You may use any character, including spaces, but the P-792H v2 drops trailing spaces. Select IKE or Manual from the drop-down list box. IKE provides more protection so it is generally recommended. Manual is a useful option for troubleshooting if you have problems using IKE key management. Select Main or Aggressive from the drop-down list box. Multiple SAs connecting through a secure gateway must have the same negotiation mode. Select Tunnel mode or Transport mode from the drop-down list box. If there is a private DNS server that services the VPN, type its IP address here. The P-792H v2 assigns this additional DNS server to the P-792H v2's DHCP clients that have IP addresses in this IPSec rule's range of local addresses. Local A DNS server allows clients on the VPN to find other computers and servers on the VPN by their (private) domain names. Specify the IP addresses of the devices behind the P-792H v2 that can use the VPN tunnel. The local IP addresses must correspond to the remote IPSec router's configured remote IP addresses. Local Address Type IP Address Start End / Subnet Mask Two active SAs cannot have the local and remote IP address(es) both the same. Two active SAs can have the same local or remote IP address, but not both. You can configure multiple SAs between the same local and remote IP addresses, as long as only one is active at any time. Use the drop-down menu to choose Single, Range, or Subnet. Select Single for a single IP address. Select Range for a specific range of IP addresses. Select Subnet to specify IP addresses on a network by their subnet mask. When the Local Address Type field is configured to Single, enter a (static) IP address on the LAN behind your P-792H v2. When the Local Address Type field is configured to Range, enter the beginning (static) IP address, in a range of computers on your LAN behind your P792H v2. When the Local Address Type field is configured to Subnet, this is a (static) IP address on the LAN behind your P-792H v2. When the Local Address Type field is configured to Single, this field is N/A. When the Local Address Type field is configured to Range, enter the end (static) IP address, in a range of computers on the LAN behind your P-792H v2. When the Local Address Type field is configured to Subnet, this is a subnet mask on the LAN behind your P792H v2. P-792H v2 User's Guide 161