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question asked: Feb 05 '10, 5:08 a.m.
question was seen: 6,539 times
last updated: Feb 05 '10, 5:08 a.m.

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Jazz client and firewalls

0
Brian Peacock (21●3) | asked Feb 05 '10, 5:08 a.m.
I'm running the RTC client on a Linux machine that has a comprehensive
firewall defined. The RTC client appears to be working OK and I don't
see any errors but, I noticed in the firewall log that a large number of
connections from the RTC server were being blocked (I masked the
ipaddresses in this example):

eg.
SRC=x.x.x.x DST=x.x.x.x LEN=40 TOS=0x00 PREC=0x00 TTL=57 ID=12342
PROTO=TCP SPT=9443 DPT=39073 WINDOW=0 RES=0x00 RST URGP=0

The SRC ipaddress is my RTC server and port 9443 is JAZZ ... and the DST
ipaddress is my machine. The port number on my machine changes in each
of the log entries showing that the RTC server picks a different port to
connect back to my machine each time. I get about 200 of these "failed"
connections each day.

What is the RTC server trying to do and is it a problem that my firewall
is stopping it ?

Brian

4 answers

Most liked answers ↑|Newest answers|Oldest answers

0
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Brian Peacock (21●3) | answered Feb 11 '10, 4:23 a.m.
Hmmm ... no comments and no thoughts from the community. Methinks I must
be the only RTC/Jazz user that runs a firewall or actually looks at the
logs :-)
0
permanent link
Ralph Schoon (63.4k●3●36●46) | answered Feb 11 '10, 5:01 a.m.
FORUM ADMINISTRATOR / FORUM MODERATOR / JAZZ DEVELOPER
Brian,

I have used RTC over firewall, DSL, VPN,... I have never experienced something like you described below. I assume this would be true for most users - hence the silence.

I am not sure what goes on at your machine. You might consider to create a work item.

Ralph

Hmmm ... no comments and no thoughts from the community. Methinks I must
be the only RTC/Jazz user that runs a firewall or actually looks at the
logs :-)
0
permanent link
Anthony Kesterton (7.5k●9●180●136) | answered Feb 11 '10, 4:57 p.m.
JAZZ DEVELOPER
Brian,

I have used RTC over firewall, DSL, VPN,... I have never experienced something like you described below. I assume this would be true for most users - hence the silence.

I am not sure what goes on at your machine. You might consider to create a work item.

Ralph

Hmmm ... no comments and no thoughts from the community. Methinks I must
be the only RTC/Jazz user that runs a firewall or actually looks at the
logs :-)


I agree with Ralph - this is rather odd.

However, any chance you are doing a lot of builds? If so - what build tool are you using?

anthony
0
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Dr. Hans-Joachim Pross (1.1k●44●58) | answered Feb 12 '10, 6:32 a.m.
JAZZ DEVELOPER
I haven't tired it:
Would be a possibility to change the RTCs default ports?
Maybe to those typically open in firewalls like 80 or 443 (the http / https port) ?

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