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