ADVANCED SET-UP
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DOC_DEV_RAS_User guide_A
Machine Access Box RAS
Advanced NAT
12.1
Overview
The advanced NAT function consists in modifying the source or destination IP addresses and port number
of the frames received by the ETIC router on its LAN or WAN interface.
It applies to all the frames received by the router on any of its two interfaces except to the IP packets
contained in a remote user connections.
One brings out
the DNAT function which consists in replacing the destination port and IP address.
the SNAT function which consists in replacing the source IP address.
Because the DNAT and SNAT functions modify the IP addresses of the IP packets processed by the RAS-3G
router, and because the firewall filters that frames, it is very important to understand in which order that
different functions are carried out.
Direction
WAN to LAN
LAN to WAN
D
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D
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Summary of Contents for RAS-E
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