Instructions how to open port range on Zyxel/Netgear 314 :
To open a port rage you must use 2 rules in a TCP Filter set. those rule have the more = yes option on the first one.
Let's say that you want to open incoming port from 4000 to 4500. you should have the folloing 2 rules in your filter set.
Menu 21.12 - Filter Rules Summary
# A Type Filter Rules M m n
- - ---- --------------------------------------------------------------- - - -
1 Y IP Pr=6, SA=0.0.0.0, SP!=0, DA=0.0.0.0, DP>3999 Y N N
2 Y IP Pr=6, SA=0.0.0.0, SP!=0, DA=0.0.0.0, DP<4501 N F N
Menu 21.12.1 - TCP/IP Filter Rule
Filter #: 12,1
Filter Type= TCP/IP Filter Rule
Active= Yes
IP Protocol= 6 IP Source Route= No
Destination: IP Addr= 0.0.0.0
IP Mask= 0.0.0.0
Port #= 3999
Port # Comp= Greater
Source: IP Addr= 0.0.0.0
IP Mask= 0.0.0.0
Port #=0
Port # Comp= Not Equal
TCP Estab= No
More= Yes Log= None
Action Matched= N/A
Action Not Matched= N/A
Menu 21.12.2 - TCP/IP Filter Rule
Filter #: 12,2
Filter Type= TCP/IP Filter Rule
Active= Yes
IP Protocol= 6 IP Source Route= No
Destination: IP Addr= 0.0.0.0
IP Mask= 0.0.0.0
Port #= 4501
Port # Comp= Less
Source: IP Addr= 0.0.0.0
IP Mask= 0.0.0.0
Port #=0
Port # Comp= Not Equal
TCP Estab= No
More= No Log= None
Action Matched= Forward
Action Not Matched= Check Next Rule
The first rule check if the port is greater then 3999, so 4000 and up match the rule
The second rule check if the port is less then 4501, so 4500 and less match the rule
If both rule are matched, that meen that the port is between 4000 and 4500 inclusively.
that way you can decide on Action Mached to foward or drop that port range..... in that exemple, we foward on Action Mached
don't forget to apply that filter on the WAN interface in the INPUT PROTOCOL FILTERS
Menu 11.5 - Remote Node Filter
Input Filter Sets:
protocol filters= 12 <---- here!
device filters=
Output Filter Sets:
protocol filters=
device filters=
Copied from this site.