Extron Electronics EXTSL250W 用户手册

Firewall Traversal

In order for the ShareLink 250 W gateway to function correctly with the ShareLink 
application, it is recommended that the following firewall rules be used to allow traffic to 
pass. The table below details the ports and their functions.

389
443

3268

TCP

Both

Command Required

For best performance, it is 
recommended that ports 389, 443, 
and 3268 be open. At a minimum, 
one of the three needs to be 
open for the gateway to function 
properly. If one port is open and 
that port is used by another 
application, the ShareLink 250 W 
does not function properly.

445
515

8080

TCP

Both

Data

Required This port is used to screen data.

1041

TCP Outbound

Video

Required This port is used for video data.

1047
1048
1049

UDP

Inbound

Discover

Optional

These ports are used for discovery 
of the gateway. If closed, the 
discovery process could be 
impacted.

1688

TCP

Both

DLNA

Required This port is used for audio data. 

2869

49152
49153

TCP

Both

DLNA

Required

These ports are used for streaming 
video data to the ShareLink 250 W. 

1900

50000-

65000

UDP

Both

DLNA

Required

These ports are used for streaming 
video data to the ShareLink 250 W.

80

TCP

Both

Web 

services

Required

This port is used to access the 
embedded webpages.

42891
42892

TCP

Both

Update 

utility

Required

These ports are used for batch 
update of firmware.

1689

TCP

Both

Debug

Optional

This port is used for the debugging 
log.

19996

TCP

Both

Command Required

This port is required for Moderator 
control.

31865

TCP

Both

Data

Optional

This port is used by Android mobile 
devices.

137

UDP

Both

NetBIOS

Optional

This port is used by NetBIOS for 
naming service.

161

UDP

Both

SNMP

Optional

This port is used for SNMP 
management.