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- Newsgroups: comp.unix.aux
- Path: sparky!uunet!wupost!zaphod.mps.ohio-state.edu!malgudi.oar.net!news.ans.net!cmcl2!panix!alexis
- From: alexis@panix.com (Alexis Rosen)
- Subject: Re: Weird telnetd/rlogind problem (A/UX 3.0)
- Message-ID: <1992Aug29.085105.2100@panix.com>
- Date: Sat, 29 Aug 1992 08:51:05 GMT
- Distribution: comp
- References: <REUVEN.92Aug27120854@pit-manager.mit.edu>
- Organization: PANIX Public Access Unix, NYC
- Lines: 44
-
- reuven@athena.mit.edu (Reuven M. Lerner) writes:
- >I'm having some problems with telnetd and rlogind on my A/UX 3.0 box
- >(IIfx with 20 MB RAM and 160+80+80 MB hard drives).
-
- >Most of the time, we don't have any problems. But every so often, we
- >can't log in on ttyp0 (the default tty). Telnet sometimes times out,
- >sometimes gives me half a prompt, and sometimes lets me log in before
- >dying. Rlogin just times out. When this is happening, I can still ping
- >my machine just fine, and all background processes also seem to work.
-
- >The workaround that we've discovered (by accident) is to log into
- >ttyp0. While that is hung, we start up a second process into ttyp1,
- >which works fine. By the time the ttyp0 process times out and dies,
- >the second connection is working just fine.
-
- >Has anyone had similar problems with their machines?
-
- I posted at length about this some time ago. Basically, A/UX is fine for
- occasional light use, but for real work, telnet and rlogin are hopeless.
- Not only are the deamons littered with bad bugs, but the kernel is too.
-
- Apple made one attempt to fix the problem which failed.
-
- John Coolidge ported the Berkeley telnet and telnetd to A/UX, and the port is
- available on wuarchive. It's your only option.
-
- The telnetd doesn't have the horrible bugs in A/UX's telnetd. It does have
- problems with telnet Synch, and maybe one other control character, but neither
- problem is terribly serious. More importantly, it doesn't provoke the kernel
- problems that crash A/UX or lock out ptys or mix up which pty belongs to which
- telnet session (!!) - a terrible security risk.
-
- Forget rlogin, unless you port it over yourself.
-
- I should stress that the problems are in the daemons. I've encountered no
- problems in the clients, rlogin and telnet, themselves. So it's only when
- an A/UX box is the _target_ that you have a problem.
-
- --
- Alexis Rosen Owner/Sysadmin,
- PANIX Public Access Unix & Internet, NYC.
- alexis@panix.com
- {uupsi,cmcl2}!panix!alexis
-
-