On 05 Feb 2003 09:30:15 -0800 Gordon Messmer <[EMAIL PROTECTED]> wrote:
> On Wed, 2003-02-05 at 07:43, Richard Kuhns wrote: > > All machines can > > communicate just fine, except for the FreeBSD box and the laptop. The > > maxmimum transfer speed between the 2 of them seems to be about > > 14K/sec, > > Just to be clear: You have one Red Hat Linux 8 machine on your desk, > and another that is a laptop. One of these communicates with the > FreeBSD box at a normal speed, and the other at only 14K/sec. Right? > How is the laptop connected to the rest of the machines? If you run > /sbin/mii-tool eth0 > on the laptop, what does it return? Perhaps it thinks the connection is > full duplex, when it is not... That doesn't quite explain it, but > that's where I'd start looking. Yes, that's it. The laptop is the only one that has any trouble, and that's only when talking to the FreeBSD box. All of the machines are connected through a Linksys 5 port Workgroup Hub. On the laptop: # /sbin/mii-tool eth0 eth0: negotiated 100baseTx-FD, link ok # The builtin ethernet card in the laptop is an AMD 79c970, if that makes any difference. > > 2) When I use ssh from either RedHat machine, it always does a DNS > > lookup on the machine name. > > Don't know on this one... It seems most likely that ssh is doing some > additional work. Are you sure the lookup is for the name of the server > you're connecting to? OK, I just tried running ethereal on the FreeBSD and monitored the dialup line. The RedHat boxes are sending AAAA queries to the nameserver for the host I'm connecting to, and of course getting a 'no such name' response. So for some reason it's doing an IPv6 name lookup. > > Use telnet to connect to the server's ssh port and see if the machine > does a DNS lookup when the name is in /etc/hosts. If so, then the > problem is probably in glibc. If not, then the problem is that ssh is > doing something that you (and I) don't understand. Good idea -- I should have thought of that myself:). I get the same results using telnet, so apparently something in glibc is always trying to do an IPv6 name lookup. I just did a little more playing around with ethereal: with 'hosts: files dns' in nsswitch.conf, there is *always* an attempt to do an AAAA query, which fails. If I change it to 'hosts: dns files', there is first an AAAA query which files, and then an A query which fails. Sounds like a bug to me. Can anyone else verify this? > > 3) I've noticed that there are quite a few programs linked with the > > kerberos libraries. I don't use kerberos now and don't expect to ever > > use it. Is there such a thing as a RedHat distribution that doesn't > > include kerberos? > > No. Do you think that ~1.5MiB of disk space is worth the effort to > produce a distribution without it? It's not that I'm concerned about the disk space. It's just that I prefer the 'Keep It Simple' philosophy wherever possible, and kerberos is a rather complex piece of software that I'm not using yet can't get rid of -- it's just another potential 'failure point'. I'm not losing any sleep over it, though. Thanks for suggestions/comments. -- Richard Kuhns [EMAIL PROTECTED] -- redhat-list mailing list unsubscribe mailto:[EMAIL PROTECTED]?subject=unsubscribe https://listman.redhat.com/mailman/listinfo/redhat-list
