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Old 08-25-2004, 03:03 PM   #1
Registered: Oct 2003
Location: Atlanta, GA
Distribution: gentoo
Posts: 68

Rep: Reputation: 15
telnetd problems, SSH not an option

hey everyone

I have an SBC that I have built a linux system on with kernel 2.6.8, gcc, Xvesa server and other cool stuff. I really need to be able to remotely access this board, and so do other people. I am using busybox's telnetd. Obviously, SSH is not really an option.

The daemon appears to run just fine, but when i try to telnet in I get the following:

# telnet
Connected to
Escape character is '^]'.
Connection closed by foreign host.

To me, this means that telnet itself is running fine because it looks like I am connecting to it, but I am being kicked off immediately. However, I have never used telnetd before so I don't really know.

I have searched the web and these forums, and asked a bit on IRC, but havent really figured anything out.

Even if you think that your solution is not applicable to Busybox, please let me know anyway.

I appreciate any suggestions

Old 08-25-2004, 03:24 PM   #2
Registered: Mar 2003
Location: Scotland
Distribution: Slackware, RedHat, Debian
Posts: 12,047

Rep: Reputation: 66
I'm interested as to why sshd isn't an option.

For a solution to your problem:
1) Try disabling your firewall iptables/ipchains
2) How are you running telnet - xinetd or standalone?
Old 08-25-2004, 03:28 PM   #3
Registered: Oct 2003
Location: Atlanta, GA
Distribution: gentoo
Posts: 68

Original Poster
Rep: Reputation: 15
sshd is not an option because the system is slow, but more importantly I need to keep the size of the CF card down to the absolute minimum, but include remote access.

I am running telnetd standalone, by simply typing "telnetd"

i have no firewall, iptables, or ipchains.

a few questions:

do I need to have a /etc/inetd.conf??
do i need xinetd?
do I have to specifically allow telnet in through /etc/hosts.allow, even if hosts.deny does not exist?
do I need to creaty any ptys or ttys for telnet to work?

I found a sample /etc/inetd.conf file online:
telnet stream tcp nowait root /usr/sbin/in.telnetd

now I havent had time to find out what all this means yet, but I do know that /usr/sbin/in.telnetd does not exist. Maybe it would with a full telnetd, but all there is with busybox is /usr/sbin/telnetd
Old 08-26-2004, 07:23 AM   #4
Registered: Oct 2003
Location: Atlanta, GA
Distribution: gentoo
Posts: 68

Original Poster
Rep: Reputation: 15
does anyone know what the differences between the busybox version of telnetd and the "normal" version? meaning what works differently, and what had to be taken out to cut it down to its tiny size


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