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Re: [Openvpn-users] OpenVPN 2.0beta11 on Linux Kernel 2.2


  • Subject: Re: [Openvpn-users] OpenVPN 2.0beta11 on Linux Kernel 2.2
  • From: Marc-Christian Petersen <m.c.p@xxxxxxx>
  • Date: Mon, 4 Oct 2004 20:44:50 +0200

On Saturday 02 October 2004 06:35, James Yonan wrote:

Hi James,

> On Sat, 2 Oct 2004, Marc-Christian Petersen wrote:
> > Hi all,
> >
> > I've compiled 2.0beta11 successfully and use it on lots of machines (all
> > 2.4) but now I have a customer who still has Kernel 2.2 running. The
> > problem is, the tunnel stays up if I do nothing but ping the end. If I
> > try to ssh into the VPN server or browse a samba share, the connection
> > locks up immediately and comes back again after ~60 seconds (Inactivity
> > timeout (--ping-restart), restarting)
> >
> > Just my 2 cents: Could it be that the fallback stuff from EPOLL does not
> > work? 2.2 does not know even a millimeter about epoll ;)
>
> I doubt it.  EPOLL is only a special optimization used on Linux 2.6 (and
> patched 2.4) in TCP server mode.  The fallback APIs of poll and select are
> still used for everything else.

Then there's some other bug with 2.2 kernels. I used proto udp, now I'm trying 
proto tcp and get these log entries when I try to use the tunnel:


Oct  4 20:43:26 alice ovpn-alice[9103]: MULTI TCP: I/O wait required blocking 
in multi_tcp_action, action=7
Oct  4 20:43:26 alice ovpn-alice[9103]: Exiting

ciao, Marc