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RX3141 User’s Manual Chapter 9. Configuring Firewall/NAT Settings
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Field Description
Subnet This option allows you to include all the computers that are connected in an
IP subnet. When this option is selected, the following fields become
available for entry:
Address Enter the appropriate IP address.
Mask Enter the corresponding subnet mask.
Self (for self access
rule only)
Indicates the router itself.
Destination IP
This option allows you to set the
destination network
to which this rule should apply. Use the drop-
down list to select one of the following options:
Any This option allows you to apply this rule to all the computers in the local
network for inbound traffic or any computer in the Internet for outbound
traffic..
IP Address, Subnet Select any of these options and enter details as described in the
Source
IP
section above.
Self (for self access
rule only)
Indicates the router itself.
Domain In order for this option to work, user’s PC must use RX3141 as its DNS
server. The domain name variable / IP addresses association is cleared
after every system restart. Multiple ACL rules can be associated to the same
domain name / IP addresses association.
f Maximum of 30 domain name variables is supported.
f Each domain name variable / IP addresses association is updated
only when the LAN client issues the DNS query to RX3141. For
example, when entering the address “http://www yahoo.com” on
your browser, RX3141 will update the IP address association w/
www.yahoo.com
in the internal database referenced by the firewall.
f Each domain name variable can be associated up to 256 IP
addresses.
f Wild card character “*” is allowed in the domain name Its usage is
illurstrated in the following examples:
1. www.google.* : match www.google.com and ww.google.net
and does not match www.google.com.tw
2. www.google.*.*: match www.google.com.tw, and
www.google.com.sg and does not match www.google.com
3. .com.tw : match www.google.com.tw, www.com.tw and does
not match com.tw
4. *.com : match google.com and abc.com and does not match
www.google.com, com
5. *: match any domain name
6. . (a single dot): match any domain name
Source Port
This option allows you to set the source port to which this rule should apply. Use the drop-down list to
select one of the following options:
Any Select this option if you want this rule to apply to all applications with an