Linux-Hams archive - August 1997: Re: Slow Telnet Response

Re: Slow Telnet Response

Terry Dawson (kbssjkqb.wuinsrz@hostit.be)
Tue, 05 Aug 1997 08:30:36 +1000


Phil Maley wrote:

> Well, I've finally taken the plunge and installed Linux / FBB on our remote
> club BBS here in Perth. The FBB side is working fine (basically) but
> telnets / ftp to Linux itself are extremely slow. I've also noticed that if
> I try to telnet from my own Linux system at home, my system sends one
> character at a time as I type- ie a full ax25 frame for each character
> typed, together with a full ack frame from the remote station. I must be
> doing something wrong but can't find anything in the docs here. Any thoughts?

'man telnet' -- In your telnet client:

^]mode line^M

What is slow about ftp ? You connect quickly, but then it sits there for
some trying before it allows you to login ? That is likely to do with
either:

1> name resolution. When you connect to you linux machine, if you are
using the tcpd (check /etc/inetd.conf) then it will attempt to
lookup your hostname and check whether you are allowed to connect
to that service (ref: NET-3-HOWTO Security section).
2> authd, your tcpd may be configured to authenticate you as a user.
it does this by querying the authorisation daemon on your machine
to confirm exactly who you are. This takes time, especially over
a radio link.

While tcpd provides some useful security and logging features, in
an amateur radio environment it is probably best to not use it.

regards
Terry