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Bug#433307: marked as done (linux-image-2.6-k7: pptp vpn broken after upgrade from 2.6.18 to 2.6.21)

Your message dated Wed, 1 Aug 2007 00:41:13 +0200
with message-id <20070731224113.GA9582@stro.at>
and subject line Bug#433307: linux-image-2.6-k7: problem solved - not a bug
has caused the attached Bug report to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what I am
talking about this indicates a serious mail system misconfiguration
somewhere.  Please contact me immediately.)

Debian bug tracking system administrator
(administrator, Debian Bugs database)
--- Begin Message --- 
Package: linux-image-2.6-k7
Version: 2.6.21+8
Severity: important


Internet connection stops working after upgrade: dns and ping work, 
http, pop3, and imap clients manage to connect but timeout when 
waiting for remote data. 
I also can't connect to the box with either ssh or web client.

Connection type: pptp via usb cable modem.

Partial workaround: lower MTU of ppp0 from default 1500 to 512 (!).
This reduces download speed by ~40% (compared to 2.6.18 kernel), 
but otherwise web access seems functional.

More configuration info:
computer: Compaq Presario 900 laptop (Mobile AMD Athlon(tm) XP 1500+)
cable modem: Thomson DCM245 (handled by usbnet module cdc_ether)
firewall disabled ("iptables --list" shows no chains)

ifconfig and route output is similar on both kernels (ip's removed),
except for error count on eth1:
eth1      Link encap:Ethernet  HWaddr hh:hh:hh:hh:hh:hh
          inet addr:xx.xx.xx.xx  Bcast:255.255.255.255  Mask:255.255.224.0
          UP BROADCAST RUNNING MULTICAST  MTU:576  Metric:1
          RX packets:2075 errors:107 dropped:0 overruns:0 frame:107
          TX packets:1141 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:331521 (323.7 KiB)  TX bytes:121522 (118.6 KiB)

ppp0      Link encap:Point-to-Point Protocol
          inet addr:yy.yy.yy.yy  P-t-P:pp.pp.pp.pp  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:673 errors:0 dropped:0 overruns:0 frame:0
          TX packets:758 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:96006 (93.7 KiB)  TX bytes:56269 (54.9 KiB)

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
pp.pp.pp.pp     *               255.255.255.255 UH    0      0        0 ppp0
pp.pp.pp.pp     gg.gg.gg.gg     255.255.255.255 UGH   0      0        0 eth1
10.0.0.0        *               255.255.255.0   U     0      0        0 eth0
xx.xx.192.0     *               255.255.224.0   U     0      0        0 eth1
default         *               0.0.0.0         U     0      0        0 ppp0

(eth0 is a local ethernet adapter)
(a route to the pptp server, thru the isp's local loop gateway is added when
eth1 is brought up:
/sbin/route add -host pp.pp.pp.pp gw gg.gg.gg.gg )

content of options.pptp:
debug
lock
noauth
nobsdcomp
nodeflate
lcp-echo-failure 10
lcp-echo-interval 20
noipdefault
hide-password
usepeerdns
persist
holdoff 60
maxfail 0
defaultroute
replacedefaultroute



-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable')
Architecture: i386 (i686)

Kernel: Linux 2.6.18-4-k7 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages linux-image-2.6-k7 depends on:
ii  linux-image-2.6.21-2-k7       2.6.21-6   Linux 2.6.21 image on AMD K7

linux-image-2.6-k7 recommends no packages.

-- no debconf information

--- End Message ---
--- Begin Message --- 
On Tue, 31 Jul 2007, Avi Rozen wrote:

<snipp long explanation>

> The workaround: supersede the mtu for this interface, by adding the
> following lines to /etc/dhcp3/dhclient.conf :
> 
> interface "eth1" {
>           supersede interface-mtu 1500;
> }
> 
> Please close this bug.
> Cheers,
> Avi.

ok cool doing.
thanks

-- 
maks

--- End Message ---
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