Zoom Gateway/Router Zoom V3 - Manual (Page 55)

Chapter 4: Using the V3’s Advanced Firewall 55
Once you’ve made your selections, click Save Changes and Write
Settings to Flash and Reboot.
Service Filtering
The Service Filtering feature lets you give certain users permission
to access the V3 from outside the network—that is, over the
Internet. If you enable one of the services listed on this page, the
V3’s firewall will open up the appropriate port to allow the service
to work.
PING from External Network Disabled by default. Enable it
to allow an external user to
ping your V3. This can be
useful if you need to
troubleshoot your unit.
FTP from External Network* Disabled by default. Enable it
to allow an external user to ftp
into your V3. Typically, you
would do this if you wanted
someone to check the V3’s
configuration.
DNS from External Network Disabled by default. Enable it
to allow your V3 to accept DNS
requests from an external
source.
IKE from External Network Disabled by default. Enable it
to allow a VPN (virtual private
network) connection to your
network.
RIP from External Network Disabled by default. Enable it
to allow your V3 to receive RIP
(Routing Information Protocol)
requests from an external
source. The Technical
Reference Manual contains
details about RIP; go to
www.zoom.com
DHCP from External Network Disabled by default. Enable it
to allow your V3 to receive
DHCP requests from an
external source.