Red Hat Bugzilla – Bug 244022
Temporary failure in name resolution: Illegal seek when telneting to RH5
Last modified: 2013-04-30 19:35:56 EDT
Description of problem:
When trying to telnet to RH5, I recieve: "Temporary failure in name resolution:
Illegal seek" and host disconnects.
Version-Release number of selected component (if applicable):
Red Hat Enterprise Linux Client release 5 (Tikanga)
Just telnet :)
If you enter the clients IP and name in /etc/hosts or use a DNS server it works
as it should. Seems like a bug that cant handle that reverse lookup cant be done.
I havent checked whether or not the DNS server have to have an A Name record or not
Steps to Reproduce:
1. Rename /etc/resolv.conf to /etc/resolv.conf.org
2. Remove clients IP and name from /etc/hosts
3. Telnet from client to Server
starting the telnetd with "-c" should help in this case..
Thank for the reply.
That flag pointed me to Bug 223448 (was curious about what it meant :)
-c This option disables reverse dns checking. Of course that
security is lower with this option
I have tried with "server_args = -c" and "server_args = in.telnetd -c" in
/etc/xinetd.d/telnet and restarted xinetd.
when trying to telnet to the server I get:
Connected to 192.168.1.109.
Escape character is '^]'.
in.telnetd: invalid option -- c
Usage: telnetd [-debug] [-D (options|report|exercise|netdata|ptydata)]
[-h] [-L login_program] [-n] [port]
Connection closed by foreign host.
Am I doing something wrong? :)
$ cat /etc/xinetd.d/telnet
# default: on
# description: The telnet server serves telnet sessions; it uses \
# unencrypted username/password pairs for authentication.
flags = REUSE
socket_type = stream
wait = no
user = root
server = /usr/sbin/in.telnetd
server_args = -c
log_on_failure += USERID
disable = no
works for me
ah, oh... different version in RHEL5 without the "-c" patch :-/ sorry...
also see bug #248063
Be happy to, but Bugzilla disagress :)
You are not authorized to access bug #248063 :(
Btw the way, going on 2 week vacation now...yiihaaa
But will check as soon as I get back..maybe earlier if I'm in any ahem sober
*** This bug has been marked as a duplicate of 253392 ***