Bret Hughes wrote:
> I have been experiencing intermittant problems with a vpn
> ppp connection through ssh. I can be working along (typing
> in a terminal) and then poof, no response for several
> minuites. during this time I can sometimes ping the box and
> others the delay is there as well. I can't figure out what
> is causing this. I don't know if the packets are getting
> dropped on the floor or what.
>
> I am dialing into mindspring via ppp with my linux laptop.
> Ifconfig shows no errors on any interface on either box, and
> nothing suspicious in the firewall logs except the modprobe
> entries below.
>
> Jul 31 10:40:17 tulfw1 modprobe: can't locate module
> ppp-compress-21
> Jul 31 10:40:17 tulfw1 modprobe: can't locate module
> ppp-compress-26
> Jul 31 10:40:17 tulfw1 modprobe: can't locate module
> ppp-compress-24
> Jul 31 10:40:18 tulfw1 modprobe: can't locate module
> ppp-compress-21
> Jul 31 10:40:18 tulfw1 modprobe: can't locate module
> ppp-compress-26
> Jul 31 10:40:19 tulfw1 modprobe: can't locate module
> ppp-compress-24
> Jul 31 10:40:19 tulfw1 modprobe: can't locate module
> ppp-compress-26
> Jul 31 10:40:20 tulfw1 modprobe: can't locate module
> ppp-compress-24
> Jul 31 10:40:20 tulfw1 pppd[30148]: found interface eth0 for
> proxy arp
> Jul 31 10:40:20 tulfw1 pppd[30148]: local IP address
> 192.168.0.30
> Jul 31 10:40:20 tulfw1 pppd[30148]: remote IP address
> 192.168.0.28
> Jul 31 10:40:20 tulfw1 modprobe: can't locate module
> ppp-compress-21
>
> when I bring the vpn interface up. I have ignored these but
> perhaps I should not?
>
> I suspected that the problem was in mindspring's network but
> I can hit other websites from my laptop when this is
> occurring with no problems.
>
> Any Ideas? I have not tried to reboot the box yet. It has
> been up about 30 days and top shows very little cpu usage
> during this time.
>
> Anything else I can check before rebooting and seeing if it
> helps? I have restarted the network but no help.
>
> Bret
More info, The logs show for a failed vpn connection atempt the
following:
Jul 31 20:59:14 tulfw1 pppd[30480]: pppd 2.3.11 started by vpnuser, uid
501
Jul 31 20:59:14 tulfw1 pppd[30480]: Using interface ppp1
Jul 31 20:59:14 tulfw1 pppd[30480]: Connect: ppp1 <--> /dev/pts/1
Jul 31 20:59:45 tulfw1 pppd[30480]: LCP: timeout sending Config-Requests
Jul 31 20:59:45 tulfw1 pppd[30480]: Connection terminated.
Jul 31 20:59:45 tulfw1 pppd[30480]: tcflush failed: Invalid argument
Jul 31 20:59:45 tulfw1 pppd[30480]: Exit.
Jul 31 20:59:45 tulfw1 sshd[30457]: log: Closing connection to
209.138.213.125
Jul 31 20:59:45 tulfw1 PAM_pwdb[30457]: (ssh) session closed for user
vpnuser
Jul 31 21:00:16 tulfw1 sshd[30483]: connect from 209.138.213.125
Jul 31 21:00:16 tulfw1 sshd[30483]: log: Connection from 209.138.213.125
port 1022
The tcflush is what I am not sure about. Is this a symptom or part of
the cause of the failed attempt? the dialup side just shows a bunch of
LCP attempts with no received answering packets.
Bret
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