by Brandon Yo » Wed, 17 Dec 1997 04:00:00
For some reason, whenever try to telnet to a remote host, I get following
message.
"telnetd: open /dev/logindmux: No such device or address
.
Connection closed by foreign host."
And OS is showing below message when it boots..
"Dec 15 17:55:19 ktvod3 unix: logindmux error reading symbols
Dec 15 17:55:28 ktvod3 unix: logindmux error reading symbols"
Question I have is what it logindmux and why it shows error reading symbols.
Is there a way to fix this ?
Thanks in advance.
1. RedHat 8.0 -- Telnet works to local host, but can't telnet from a remote machine
Installed RedHat 8.0 today on a generic clone PC. We'll call it "New
Box" Seems to be a security configuration issue -- here's the
details:
I can:
Telnet from "New Box" to anywhere
Telnet from "New Box" to it's own IP, using my own user account (let's
call myusername)
Telnet from "New Box" to it's loop back (127.0.0.1), using myusername
Ping "New Box"'s IP address from itself and any machine on our network
Ping any IP on our network from "New Box"
I can't
Telnet from "New Box" to it's own IP (or Loop back), using the root
account (and I know I have the right password -- I login to the box
currently using root)
Telnet from a Windows machine to "New Box"'s IP address
Telnet from a Red Hat 6.2 machine to "New Box"'s IP address
Telnet from a Red Hat 6.2 machine to it using the line, "telnet -l
myusername 192.168.7.198"
About the box:
IP Address of 192.168.7.198, assigned by a DHCP server.
Configuration was pretty much "factory defaults" of the install,
choose minimum firewall security.
Configuration Files:
/etc/xinetd.d/telnet:
# default: on
# description: The telnet server serves telnet sessions; it uses \
# unencrypted username/password pairs for authentication.
service telnet
{
disable = no
flags = REUSE
socket_type = stream
wait = no
user = root
server = /usr/sbin/in.telnetd
log_on_failure += USERID
/etc/hosts:
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
/etc/hosts.deny:
#
# hosts.deny This file describes the names of the hosts which are
# *not* allowed to use the local INET services, as decided
# by the '/usr/sbin/tcpd' server.
#
# The portmap line is redundant, but it is left to remind you that
# the new secure portmap uses hosts.deny and hosts.allow. In
particular
# you should know that NFS uses portmap!
/etc/hosts.allow:
#
# hosts.allow This file describes the names of the hosts which are
# allowed to use the local INET services, as decided
# by the '/usr/sbin/tcpd' server.
#
# Following two entries made by Matt 11/26:
in.telnetd: 192.168.7.
in.ftpd: 192.168.7.
2. What exactly is the system load?
3. Get 'cannot connect to host', yet can ping remote host!!
4. Remote printing to a NT Machine
5. Network Problems - Remote Ping successful / telnet local successful / telnet remote failed
7. Limit Telnet's to Host in /etc/hosts
9. Remote Ping successful/telnet local successful/telnet remote failed
10. RedHat 5 'who' hangs in remote telnet
11. telnet localhost gets 'Connection closed by foreign host'
12. telnet connects, but 'closed by foreign host' b4 prompt
13. nslookup works; telnet/ftp require IP #'s (can't process host names)