VPN causes slow network connections
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
network-manager (Ubuntu) |
Expired
|
Undecided
|
Unassigned |
Bug Description
Binary package hint: network-manager
I have a split VPN config, so that only network traffic destined for my office and production environments goes across the VPN. Normal traffic goes out my regular internet connection.
After upgrading to Natty, I have found a significant performance loss dealing with connections. I have verified that the split VPN config is still working with traceroutes, it is not sending all traffic over the VPN. I have also tried using nscd in case it was a DNS problem, but it is not.
A timed ssh to an internet server, while on the VPN:
real 0m27.321s
user 0m0.000s
sys 0m0.000s
The same server, same command, while not on the VPN:
real 0m1.241s
user 0m0.000s
sys 0m0.000s
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: network-manager 0.8.4~git.
ProcVersionSign
Uname: Linux 2.6.38-7-generic x86_64
NonfreeKernelMo
Architecture: amd64
CRDA: Error: [Errno 2] No such file or directory
Date: Fri Apr 8 11:32:50 2011
IfupdownConfig:
auto lo
iface lo inet loopback
InstallationMedia: Ubuntu 10.04.1 LTS "Lucid Lynx" - Release amd64 (20100816.1)
Keyfiles: Error: [Errno 2] No such file or directory
NetworkManager.
[main]
NetworkingEnab
WirelessEnable
WWANEnabled=true
ProcEnviron:
LANGUAGE=en_US:en
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
RfKill:
SourcePackage: network-manager
UpgradeStatus: Upgraded to natty on 2011-04-01 (7 days ago)
Could MTU be too high or too low for that connection? Or maybe compression can be adjusted to make sure it doesn't impact CPU time for the connection?
These details are pretty specific to the environment you use a VPN in; I think they should be checked too.
As a way to try and measure impact of configuration, could you try to use a config as simple as possible, possibly avoiding split-tunnel, just to check whether delays are still visible in that case?
Thanks.