[Pidgin] #5790: Can't logon to MSN from OpenBSD firewall

[Pidgin]

#5790: Can't logon to MSN from OpenBSD firewall
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Reporter:  komiapoika  |       Owner:  khc                                                   
    Type:  defect      |      Status:  new                                                   
Priority:  minor       |   Component:  MSN                                                   
 Version:  2.4.1       |    Keywords:  scramble pf.conf firewall security can not login logon
 Pending:  0           |  
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 Hello

 Using Pidgin, I can't logon to MSN when my OpenBSD firewall is in secure
 mode.

 Let me explain

 My LAN is behind a OpenBSD router. In OpenBSD, the firewall is managed
 through the configuration file /etc/pf.conf. In there, I have a line to
 scramble packets to foil some kinds of potential incoming attacks. The
 line goes as follow:

 scrub on $ext_if all no-df random-id min-ttl 30 reassemble tcp fragment
 reassemble

 When firewall is scrambling, I can logon to Yahoo, MSN and ICQ from Adium
 on my Mac. But from Pidgin (and I can remember the problem from the Gaim
 days as well), I can only logon to Yahoo and ICQ, not MSN.

 If I turn off the scambling, ie when I'm using a pf.conf without any
 scramble line, then and only then I can logon to MSN from Pidgin.

 I'm not sure how to trace this, any help would be appreciated. I'm running
 Linux 2.6.24-16-generic #1 SMP x86_64 GNU/Linux

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Ticket URL: <http://developer.pidgin.im/ticket/5790>
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