Bug 190141

I'm sorry but I cannot reproduce this problem here.

Which client version do you use?

Could you try to run the server with sshd -ddd and attach the debug output here?
Could you do the same on client? (ssh -vvv ....)

This is actually using PuTTy version 0.58 as my client.  I've also used the
current development tip version of PuTTy with the same negative results.

I'll put together th requested -ddd and -vvv output files tomorrow when I have a
spare moment -- might be kind of hard to get the -vvv files or the equivalent
since I'm using PuTTy though.  We'll see.

Thanks,

Jeff G.

Created attachment 128467 [details]
Putty ssh client logging

Created attachment 128468 [details]
Log file from running -ddd parameter with sshd

Upon further investigation, this issue where forwarding isn't happening is when
I specify the host using its DNS name.  If I specify an IP address, then the
forwarding works OK.

I would be the first to point a finger at my DNS configuration, but this all
worked just fine before I did the April 21 yum update.  Also, DNS name
resolution to IP address works fine on the server and the client machines with
other applicaitons.

Thanks,

Jeff G.

What prints 'host webcam2.test.org' when you run it on the server?

Please note that I text replaced my domain name with "test.org" log files that I
posted after I ran the tests.  I made this change for privacy reasons.  With
that being said, I've run the test that you requested and again made the same
change afterwards:

$ host webcam2.test.org
webcam2.test.org has address 192.168.0.121


This DNS name translation to IP address is correct.

Created attachment 128478 [details]
Testcase

Can you try compiling and running this testcase as './testgai webcam2.test.org
80'?

I don't think it is a problem of sshd, but of the glibc.
I have similar problems with other programs when using glibc-2.3.6-3 on my i386 fc4:

scp -P 22 somehost:x .     fails with a "System error"
scp       somehost:x .     succeeds
scp -P 22 someip:x .       succeeds
(somehost is the full qualified host name, someip is number.number.number.number)
(note that ssh works in all configuration)

ncftp somehost             fails with a "segmentation fault"
ncftp someip               succeeds

yum list (or update, etc)  fails with "Cannot find a valid baseurl for repo..."
                           obviously, it could not fetch the mirror list.

nxclient    (from NoMachine) fails also with a "System error"

All of this works nicely if I downgrade glibc to 2.3.5-10.3

I don't have any named running. My resolv.conf contains three nameserver lines
and a "search localdomain" line. "host somehost" works correctly, and
"./testgai webcam2.test.org 80" gives "getaddrinfo succeeded".

I am back to using glibc-2.3.5 to have a usable system. I can make some more
test, but I need to "upgrade" glibc, make the tests and downgrade it. It would
be nice if you could batch the tests you ask me to do...

-> glibc

Results of testcase execution below:

  $ ./testgai webcam2.test.org 80
  getaddrinfo succeeded


Thanks,

Jeff G.

Just remove nisplus from your nsswitch.conf.

*** This bug has been marked as a duplicate of 186592 ***

I can confirm that removing the nisplus entries from my /etc/nsswitch.conf file
is a valid work-around to resolve this issue.

Thanks,

Jeff g.