forefront port problem

[jjohnsoncantell]

Greetings,

 

Im testing an online tutoring system which is supposed to communicate on port 1935 and default back to 80 if it cannot use that port. I have setup a rule to allow in/outbound access for that protocol yet it defaults back to using port 80. In the log i can see it open and close port 1935 but thats it, it refuses to cotinue using it.

 

The logging shows it tried to use port 1935

Initiated Connection ISA 10/06/2013 13:17:28

Log type: Firewall service

Status: The operation completed successfully.

Rule: Tute Access

Source: Internal (192.168.0.207:50137)

Destination: External (t01.tute.com 164.177.138.80:1935)

Protocol: RTMP

Additional information

Number of bytes sent: 0 Number of bytes received: 0

Processing time: 0ms Original Client IP: 192.168.0.207

 

and then i see this

Closed Connection ISA 10/06/2013 13:20:00

Log type: Firewall service

Status: A connection was abortively closed after one of the peers sent an RST packet.

Rule: Tute Access

Source: Internal (192.168.0.207:50135)

Destination: External (t01.tute.com 164.177.138.80:1935)

Protocol: RTMP

Additional information

Number of bytes sent: 17072 Number of bytes received: 340069

Processing time: 151992ms Original Client IP: 192.168.0.207

 

 

Any ideas what is happening?

 

Thanks

James

[psydii]

Is there a firewall / RBC between the ISA and the internet? I had to ask LGFL to open up ports to various netblocks to get RTSP to work for certain caching services.

[jjohnsoncantell]

Nope this is the only firewall, we are on a leased line.