User manual

Chapter 4 - Layer 3 Command Set - IP Networking Nat Command (Network Address Translation)
Alvarion BreezeNET B130/B300 GigE 200 Operational User Manual
nat verbose yes|no
Enables diagnostic mode and prints modified packets into system log.
nat Proxy only yes|no
If enabled then NAT-module only forwards packet according to proxy_rule
commands. Usual NAT not performed.
nat stat
Shows NAT statistics.
Packet redirection
NAT disadvantage is that local hosts are not accessible from Internet. Local hosts
can establish outgoing connections but cannot serve incoming. This hinders
starting Internet applications on local hosts. Simple solution is to redirect traffic
from some ports to local hosts.
The below commands are dedicated for creating redirection rules (redirect_xxx
and proxy_rule). Multiple command execution with different arguments allowed.
Commands are numbered when browsed using config show. This allows to delete
not needed rules using nat del XX where XX is sequential number in the config
show list.
nat redirect_port
The command comes with two flavors.
First type:
redirect_port proto local_addr:local_port_range
[public_addr:]public_port_range
[remote_addr[:remote_port_range]]
This command redirects incoming packets for specified port to other address and
other port.
Argument proto may be tcp, udp, ras or cs.
In case of ras and cs address modification is performed according to H.323
local_addr:local_port_range - IP-address and port of the local host which the
traffic will be redirected to.
[public_addr:]public_port range - public IP-address and port of the device.
The port ranges local_port_range and public_port_range should be of the same
range.