Allan Latham wrote:
this has generated a lot of replies. It may make it easier if we could
all see a more precise statement of the problem:
What exactly are you running - hardware, OS and cipe versions at both
ends? What are the respective performances for both small and large files
(in each direction)?
Main desktop system: Athlon XP 1700+
Firewall: 166 MHz Pentium
Notebook: 1.113 GHz PIII
Red Hat 7.3 on all systems, with CIPE cipe-1.4.5-9 on both ends of the VPN
Wben accessing the notebook from the home lan, performance is as may be
expected from a dial up connection for all protocols. When accessing
the home network from the notebook, everything works fine, except SMB &
NFS. For example, ftp works OK. I haven't made any performance
measurements. However Ethereal shows SMB transfers stop after about 12
packet exchanges. If I wait an extremely long time, I may see something
show up, but not much.
Are directory searches slow or just file transfers?
If your OS supports pings of various lengths what does this show (in each
I haven't tried different length pings, however other traffic, such as
telnet, ftp, ssh etc. have no problems. I have also tried adjusting MTU
on both the VPN and end systems. Ping times through the firewall are
slightly longer than those without.
What are the firewall rules on all machines you have control of
(notebook, cable modem (if applicable), home router, file server)?
What NFS sofware are you using - is it TCP or UDP based?
There are no firewall rules currently running on the notebook. The VPN
traffic doesn't pass through any firewall rules, though the ethernet
port to the cable modem is filtered and configured to pass the
appropriate UDP ports. I'm using the NFS that came with Red Hat, which
I believe is UDP. The firewall rules were posted in another message.
One last point not raised so far - what are your transmit queue lengths
on the file server and the home router. Ifconfig gives you these.
All are 100.
Please excuse me if some of this is already available in the current
thread but it would be good to get it one place.
I feel that this will go some way to helping everyone on the list get a
clearer picture - and hopefully an answer.
On Sunday 31 August 2003 04:39, James Knott wrote:
I've notice that while my CIPE VPN works, that SMB and NFS access of my
home network from my notebook is slow. However, going the other way,
accessing file shares on my notebook, from my home lan is fine. I'm
connecting from my notebook, via dialup ISP and cable modem to my home
Why is this problem in only one direction? Is it due to the speed
difference between my home network and dial up modem?
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