USER MANUAL
Peplink Balance Series
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Copyright © 2014 Peplink
number. Redirected server settings for each WAN can be set here. If forwarding is disabled for a WAN,
then web proxy connections for that WAN will simply be
forwarded to the connection’s origi
nal destination.
22.4.3 DNS Forwarding
When DNS Forwarding is enabled, all clients’ outgoing DNS requests will also be intercepted and
forwarded to the built-in DNS proxy server.
22.5
Service Passthrough
Service Passthrough settings can be found at:
Network>Misc. Settings>Service Passthrough
.
Some Internet services need to be specially handled in a multi-WAN environment. The Peplink Balance
can handle these services such that Internet applications do not notice it is behind a multi-WAN router.
Settings for Service Passthrough Support are available here.
Service Passthrough Support
SIP
Session Initiation Protocol, aka SIP, is a voice-over-IP protocol. The Peplink Balance can
act as a SIP Application Layer Gateway (ALG) which binds connections for the same SIP
session to the same WAN connection and translate IP address in the SIP packets
correctly in NAT mode. Such passthrough support is always enabled and there are two
modes for selection:
Standard Mode
and
Compatibility Mode
If your SIP server’s signal port numb
er is non-standard, you can check the box
Define
custom signal ports
and input the port numbers to the text boxes.
H.323
With this option enabled, protocols that provide audio-visual communication sessions will
be defined on any packet network and passthrough the Balance.
FTP
FTP sessions consist of two TCP connections; one for control and one for data. In multi-
WAN situation, they have to be routed to the same WAN connection. Otherwise,
problems will arise in transferring files. By default, the Peplink Balance monitors TCP
control connections on port 21 for any FTP connections and binds TCP connections of