> to Linux machines with RedHat 3.0.3 and Slackware. Also telneting
> between Linux machines themselves is OK independent of particular
> distribution. What can be the problem?
Try to see logs on linux machine .It can be a problem with tcpd ,
that can't back-resolve name of your IBM,or can but do it wrong,
dropping domain name,for example .
Hope it helps ,
Meir