[4528] in linux-net channel archive
Re: IP Masquerading
daemon@ATHENA.MIT.EDU (Charles Brian Hill)
Wed Sep 25 00:19:58 1996
Date: Tue, 24 Sep 1996 15:26:47 -0400 (EDT)
From: Charles Brian Hill <hill@unr.net>
To: Nigel Metheringham <Nigel.Metheringham@theplanet.net>
cc: linux-net@vger.rutgers.edu
In-Reply-To: <m0v5ZXR-000BF9C@dingo.theplanet.co.uk>
On Tue, 24 Sep 1996, Nigel Metheringham wrote:
>
> } If any of you have seen these, is there something that can be done about
> } them? Is there some kind of trick I need to do in order to correct the
> } problem? I'm using SLIP to connect to my dialup provider. That's about
> } all the relevant information I can think of, though.
>
> Do they come from the same IP every time, or all over the place?
They're from all over the place. Usually only with ftp and http
transfers, but those are the only protocols with which I regularly send
more than a little data at a time. I have noticed, however, that the
machines just on the other side of the SLIP link are as likely to give me
problems as the ones outside of our domain.
> Do they come in bursts?
They come in fairly often whenever I do ftp or http transfers.
> Do you see errors on the slip interface?
None that I can tell. i.e., none are reported to /var/adm/messages.
> Is there any way I can blame this on your setup :-)
Maybe. One question I had would be about MTUs. I'm using an MTU of 296
currently. I'm going to try changing it to 1500 this evening (that's what
the terminal server on the other end defaults to) to see what happens.
Have you heard of MTU size affecting data integrity?
> If they are relatively rare (I mean 1 per minute or less), then I'd
> say ignore them, otherwise there are problems somewhere.
>
Unfortunately they cut the throughput of large transfers by 25-50%.
:(
-Brian
--
Charles Brian Hill Florida State University
hill@mail.unr.net Computer Science Department
Home =904.577.0425 UNIX System Administrator
Work =904.385.0436 Up & Running Computers, Inc.
Pager=904.657.6772 http://puck.scri.fsu.edu/~hill
