kern/134557: [netgraph] [hang] 7.2 with mpd5.3 hanging up - ng_pptp problem

Bohdan Tymkiv bohdan200 at
Sat Jun 6 16:40:04 UTC 2009

The following reply was made to PR kern/134557; it has been noted by GNATS.

From: Bohdan Tymkiv <bohdan200 at>
To: bug-followup at, sergei.cherveni at
Subject: Re: kern/134557: [netgraph] [hang] 7.2 with mpd5.3 hanging up -
 ng_pptp problem
Date: Sat, 06 Jun 2009 19:01:14 +0300

 I can confirm this issue. 
 I have a FreeBSD 7.2-STABLE box with mpd 5.3 configured as PPPoE client
 that connects to my ISP. If I make any PPTP VPN connection that goes
 through this PPPoE link my server hangs. I made some investigations and
 found that deadlock occurs only when pptp connection goes via pppoe
 link, connection from local network works fine. Deadlock occurs exactly
 when first data packet is sent through pptp connection. mpd can be
 configured as server that listens on my external pppoe interface or it
 can be configured as client that connects to other server in internet.
 In both cases it hangs.
 Bohdan Tymkiv <bohdan200 at>

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