Re: pppd stuck in ioctl(TIOCSETD) in Linux 2.6.15.4+

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Jorge Daniel Sequeira Matias wrote:
> 
>  Hi everyone,
> 
>  I'm running a PPTP VPN Server for almost 4 years now. This server is
> running in a Debian Linux (unstable).
>  The configuration for the last 1 year and a half was the following:
> 
>  Computer 2x Intel Xeon 2.6GHz and 512MB RAM
>  Linux v2.6.11.6 (vanilla) with MPPE patch
>  Debian distribution with the following packages
>     - pppd 2.4.3-20050321
>     - libradius1 0.3.2-8
>     - radiusclient1 0.3.2-8
> 
>  With this configuration I had reach a peek of aprox. 600 hundred PPTP
> connections simultaneously. The computer gets heavy loaded doing MPPE
> compression/decompression with 40Mbits/sec of PPP traffic but didn't
> have any problem with this setup. The authentication process is using a
> pool of RADIUS servers.
> 
>   This machine is also a firewall, and now a new feature was needed:
> PPTP VPN connections from the inside.
> 
>  The problem:
> 
>   After the upgrade to a Linux v2.6.15.4 (vanilla) with no patches to
> use the new "ip_conntrack_pptp" module, I started to get "pppd"
> processes hanging in "S" state and consuming CPU power.

Does the problem go away without the ip_conntrack_pptp module loaded?
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