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D-Link DIR-615+ User Manual
Section 4 - Configuration
ALG/Passthrough
The ALG/Passthrough page allows you to configure the router to use RTSP,
enable the SIP ALG and PPPoE/PPTP/L2TP/IPsec passthrough functions.
Toggle this switch to enable/disable the following:
SIP
PPPoE passthrough
RTSP
IPsec passthrough
High priority for IPTV
L2TP passthrough
High priority for service traffic
High priority for service traffic
High priority for Web interface and Telnet
PPTP passthrough
Click
APPLY
when finished.