Technical information

Watson SHDSL Router
Web-based Management Manual
Watson-SHDSL-Router-GUI-Manual.doc
Version 2.3-03
8-20
Revision: 2012-02-29
STEP 3 Translate the range 192.168.1.21–192.168.1.25 to 192.168.71.13–
192.168.71.14. Define this NAT rule in the same manner depicted above. The fol-
lowing attention message will be displayed:
Figure 8-23: Attention
Click 'OK'. The rule will be displayed in the 'NAT' screen:
Figure 8-24: NAT/NAPT Rule Sets
This rule translates five new LAN IP addresses to two NAT IP addresses, both of
which are already in use by the second rule. Watson is therefore unable to resolve
this situation and the rule's status is set to "Error". Notice that this rule been defined
as the second rule, all three rules would be valid. This is because the NAT address
192.168.71.15 would still be available for rule number 1. This can easily be amend-
ed: you can use the green arrow icons to move a rule entry up or down, changing
its priority respectively. Click this rule's action icon once. All rules will now be set
to "Active".
Rule number 1 now maps five LAN addresses to one NAT address. Watson subtracts
all previously used NAT addresses, requested by previous rules, from the requested
NAT addresses of the current rule. The requested range of addresses does not de-
termine how many will be available; the number of available addresses is determined
by previous rules configuration and order. Rules will appear as "Active" even if they
only have one usable NAT address.
STEP 4 Translate the address 192.168.1.5 to 192.168.71.16 ports 1024-1050. De-
fine this NAPT rule in the same manner depicted above, with the following excep-
tion: