Service Passthrough - peplink Pepwave MAX Series User Manual

21.5 Service Passthrough

Service passthrough settings can be found at Advanced>Misc. Settings>Service Passthrough.
Some Internet services need to be specially handled in a multi-WAN environment. Pepwave routers can
handle these services such that Internet applications do not notice being behind a multi-WAN router.
Settings for service passthrough support are available here.
Session initiation protocol, aka SIP, is a voice-over-IP protocol. The Pepwave router 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
SIP
passthrough support is always enabled, and there are two modes for selection: Standard Mode
and Compatibility Mode. If your SIP server's signal port number is non-standard, you can check
the box Define custom signal ports and input the port numbers to the text boxes.
With this option enabled, protocols that provide audio-visual communication sessions will be
H.323
defined on any packet network and pass through the Pepwave router.
FTP sessions consist of two TCP connections; one for control and one for data. In a multi-WAN
situation, they must be routed to the same WAN connection. Otherwise, problems will arise in
transferring files. By default, the Pepwave router monitors TCP control connections on port 21 for
FTP
any FTP connections and binds TCP connections of the same FTP session to the same WAN. If
you have an FTP server listening on a port number other than 21, you can check Define custom
control ports and enter the port numbers in the text boxes.
The Pepwave router monitors outgoing TFTP connections and routes any incoming TFTP data
TFTP
packets back to the client. Select Enable if you want to enable TFTP passthrough support.
This field is for enabling the support of IPsec NAT-T passthrough. UDP ports 500, 4500, and
10000 are monitored by default. You may add more custom data ports that your IPsec system uses
IPsec NAT-T
by checking Define custom ports. If the VPN contains IPsec site-to-site VPN traffic,
check Route IPsec Site-to-Site VPN and choose the WAN connection to route the traffic to.
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Service Passthrough Support
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