Re: [hylafax-users] Hylafax / WHFC vs firewall

[Kimble Young <kimble@xxxxxxxxxxxxxxx>]

Pedro,

Check out this earlier conversation about connection tracking on the firewall. Specifically the post I've linked to.

http://www.hylafax.org/archive/2004-11/msg00349.php

Regards,

Kimble Young

Bob van der Waard wrote:

Pedro,

In Fax/System Preferences you can set Enable Passive FTP true/false. 

But this doesn't change the behavior... Destination still varies from
connection to connection.

BTW I'm using iptables on a Linux system.

Kind regards,
 
 
Bob van der Waard
Stout & Storm
 
 
-----Oorspronkelijk bericht-----
Van: hylafax-users-bounce@xxxxxxxxxxx
[mailto:hylafax-users-bounce@xxxxxxxxxxx] Namens Pedro
Verzonden: zondag 19 juni 2005 16:44
Aan: Bob van der Waard
CC: hylafax-users@xxxxxxxxxxx
Onderwerp: Re: [hylafax-users] Hylafax / WHFC vs firewall

I think WHFC has a check box called "passive mode" or
"passive conection" or something close to that. 
You don't say which firewall are you using but I
recall threads about hylafax and firewalling. Hope
this helps.

Pedro
--- Bob van der Waard <bob@xxxxxxxxxxxxxxx> wrote:

  

Hi list,

 

I've yet another question...

 

I'm using WHFC to send fax message to my Hylafax
gateway. But when I enable
the firewall on the Hylafax server, WHFC can't setup
a session with the
Hylafax server.

 

Don't get me wrong here...

 

It can connect to the Hylafax server at port 4559
but WHFC can't setup a
session when authenticated to the Hylafax server.

 

I noticed in de logging that WHFC tries to connect
between a range of
destination ports on the Hylafax server.

 

See example:

 

Jun 12 07:40:32 samba kernel:
giptables-drop-src-norule: IN=eth0 OUT=
MAC=00:11:09:8f:aa:3c:00:04:e2:aa:26:cd:08:00
SRC=""
DST=192.168.1.252 LEN=48 TOS=0x00 PREC=0x00 TTL=128
ID=36760 DF PROTO=TCP
SPT=1904 DPT=34011 WINDOW=16384 RES=0x00 SYN URGP=0

Jun 19 14:00:13 samba kernel:
giptables-drop-src-norule: IN=eth0 OUT=
MAC=00:11:09:8f:aa:3c:00:04:e2:aa:26:cd:08:00
SRC=""
DST=192.168.1.252 LEN=48 TOS=0x00 PREC=0x00 TTL=128
ID=29356 DF PROTO=TCP
SPT=1367 DPT=37709 WINDOW=16384 RES=0x00 SYN URGP=0

Jun 19 14:03:02 samba kernel:
giptables-drop-src-norule: IN=eth0 OUT=
MAC=00:11:09:8f:aa:3c:00:04:e2:aa:26:cd:08:00
SRC=""
DST=192.168.1.252 LEN=48 TOS=0x00 PREC=0x00 TTL=128
ID=30251 DF PROTO=TCP
SPT=1372 DPT=37711 WINDOW=16384 RES=0x00 SYN URGP=0

Jun 19 14:05:20 samba kernel:
giptables-drop-src-norule: IN=eth0 OUT=
MAC=00:11:09:8f:aa:3c:00:04:e2:aa:26:cd:08:00
SRC=""
DST=192.168.1.252 LEN=48 TOS=0x00 PREC=0x00 TTL=128
ID=31134 DF PROTO=TCP
SPT=1377 DPT=37713 WINDOW=16384 RES=0x00 SYN URGP=0

 

As you can see the Source port varies and the
Destination port increased
after successful or unsuccessful connection.

 

I can disable firewalling... but that's not my
policy.

 

I like to know between what Destination ports WHFC
tries to connect?
34000:40000. Please advice.

 

Kind regards

 

 

Bob van der Waard

Stout & Storm

 



 


    

		
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