NB3000-Line-Hd User Manual 4.2
Administration
Figure 5.31.: IPsec Administration
This page can be used to enable/disable IPsec, you may also specify whether NAT-Traversal
should be used.
NAT-Traversal is mainly used for connections which traverse a path where a router modifies
the IP address/port of packets. It encapsulates packets in UDP and therefore requires a
slight overhead which has to be taken into account when running over small-sized MTU
interfaces.
Please note that running NAT-Traversal makes IKE using UDP port 4500 rather than 500
which has to be taken into account when setting up firewall rules.
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