User's Manual

Chapter 15 IPSec VPN
NBG-460N User’s Guide
215
IPSec Keying
Mode
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.
Protocol
Number
Enter 1 for ICMP, 6 for TCP, 17 for UDP, etc. 0 is the default and
signifies any protocol.
DNS Server
(for IPSec VPN)
If there is a private DNS server that services the VPN, type its IP
address here. The NBG-460N assigns this additional DNS server to the
NBG-460N's DHCP clients that have IP addresses in this IPSec rule's
range of local addresses.
A DNS server allows clients on the VPN to find other computers and
servers on the VPN by their (private) domain names.
Local Policy Local IP addresses must be static and correspond to the remote IPSec
router's configured remote IP addresses.
Two active SAs can have the same configured 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.
In order to have more than one active rule with the Secure Gateway
Address field set to 0.0.0.0, the ranges of the local IP addresses
cannot overlap between rules.
If you configure an active rule with 0.0.0.0 in the Secure Gateway
Address field and the LAN’s full IP address range as the local IP
address, then you cannot configure any other active rules with the
Secure Gateway Address field set to 0.0.0.0.
Local Address For a single IP address, enter a (static) IP address on the LAN behind
your NBG-460N.
For a specific range of IP addresses, enter the beginning (static) IP
address, in a range of computers on your LAN behind your NBG-460N.
To specify IP addresses on a network by their subnet mask, enter a
(static) IP address on the LAN behind your NBG-460N.
Local Address
End /Mask
When the local IP address is a single address, type it a second time
here.
When the local IP address is a range, enter the end (static) IP address,
in a range of computers on the LAN behind your NBG-460N.
When the local IP address is a subnet address, enter a subnet mask on
the LAN behind your NBG-460N.
Local Port Start 0 is the default and signifies any port. Type a port number from 0 to
65535. Some of the most common IP ports are: 21, FTP; 53, DNS; 23,
Telnet; 80, HTTP; 25, SMTP; 110, POP3.
Local Port End Enter a port number in this field to define a port range. This port
number must be greater than that specified in the previous field. If
Local Port Start is left at 0, Local Port End will also remain at 0.
Table 70 Security > VPN > General > Rule Setup: Manual (continued)
LABEL DESCRIPTION