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Re: [Openvpn-users] Strange throughput-problem

  • Subject: Re: [Openvpn-users] Strange throughput-problem
  • From: Erich Titl <erich.titl@xxxxxxxx>
  • Date: Thu, 07 Jul 2005 07:33:07 +0000


Fridtjof Busse wrote:
> Hi
> I'm running OpenVPN-2.0 on OpenBSD, which worked fine for me for two
> months.
> Now I replaced the Realtek-NICs in the router with one Quad-NIC (D-Link
> DFE-580TX) since I was running out of PCI-slots.
> Now one really strange problem arised: The throughput to the
> internet over the VPN dropped to 1/100 of what if was before. 
> The VPN is "running" on a WLAN-PCI (Prism2), the SDSL-modem is connected
> to the first port on the quad-PCI and the LAN is connected to the
> second one.
> If I bring up the VPN-tunnel and transfer files from the LAN, I get the
> full speed of the link. If I now transfer files from the internet, I
> get 1/100 of the speed of the internet-link (used to be ~120kB, now
> it's 1-2kB). First I thought this was an interface problem, but if I
> don't use VPN, I get full speed to the internet again (over the WLAN). 
> And now the really strange part: If I repower the SDSL-modem, I get
> full speed over the VPN to the internet as well. As soon as I reboot
> the router, the situation is back and I have to repower the modem to
> get full speed.
> I really have *no* idea where to look for the problem, so I'd be really
> thankful for any clues.

Could be incompatibility in negotiation between your new NIC and the DSL
modem. Are you sure OpenVPN plays any role at all?



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