I’m building an embedded system for a PowerPC, based on the MPC8540ADS BSP.
I would like to setup the telnetd server.
Here is waht I did:
- add telnetd to /usr/sbin
- add inetd to /proc/boot and start it in the boot script
- add inetd.conf, services to /etc
When I try to open a telnet session have got the following messages:
On the client side:
telnet 192.168.1.40
Trying 192.168.1.40…
Connected to 192.168.1.40.
Escape character is ‘^]’.
Connection closed by foreign host.
On the embedded system running QNX:
someone wants telnet
accept, ctrl 3
4106 reaped, status 0x100
Did I forget something important, probably yes!
here is my inetd.conf:
@(#)inetd.conf 1.23 90/01/03 SMI
Configuration file for inetd.
To re-configure the running inetd process, edit this file, then
send the inetd process a SIGHUP.
Internet services syntax:
<service_name> <socket_type> <server_pathname>
# # Time service is used for clock syncronization. # #time stream tcp nowait root internal #time dgram udp wait root internalFtp and telnet are standard Internet services.
#ftp stream tcp nowait root /usr/sbin/ftpd in.ftpd -l
telnet stream tcp nowait root /usr/sbin/telnetd in.telnetd
Shell, login, exec are BSD protocols.
#shell stream tcp nowait root /usr/sbin/rshd in.rshd
#login stream tcp nowait root /usr/sbin/rlogind in.rlogind
#exec stream tcp nowait root /usr/sbin/rexecd in.rexecd
Tftp service is provided primarily for booting. Most sites run this
only on machines acting as “boot servers”.
#tftp dgram udp wait root /usr/sbin/tftpd in.tftpd
Systat and netstat give out user information which man be
valuable to potential “system crackers.” Many sites choose to disable
some or all of these services to improve security.
#systat stream tcp nowait root /bin/ps ps -auwwx
#netstat stream tcp nowait root /usr/bin/netstat netstat -f inet
IPv6 services.
The only difference with the above is “tcp6” instead of “tcp”.
Be sure to enable both “tcp” and “tcp6” when you need service for
both IPv4/v6.
#ftp stream tcp6 nowait root /usr/sbin/ftpd
ftpd -ll
#telnet stream tcp6 nowait root /usr/sbin/telnetd
telnetd
#shell stream tcp6 nowait root /usr/sbin/rshd rshd -L
#login stream tcp6 nowait root /usr/sbin/rlogind
rlogind -L
#tftp dgram udp6 wait root /usr/sbin/tftpd
tftpd -l -s /tftpboot
\
Neutrino specific services
#pidin stream tcp nowait root /bin/pidin pidin
#pidinmem stream tcp nowait root /bin/pidin pidin mem
#pidinarg stream tcp nowait root /bin/pidin pidin arg
#pidinenv stream tcp nowait root /bin/pidin pidin env
#pidinsig stream tcp nowait root /bin/pidin pidin sig
#phrelay stream tcp nowait root /usr/bin/phrelay phrelay -x
Echo, discard, daytime, and chargen are used primarily for testing.
#echo stream tcp nowait root internal
#echo dgram udp wait root internal
discard stream tcp nowait root internal
discard dgram udp wait root internal
#daytime stream tcp nowait root internal
#daytime dgram udp wait root internal
#chargen stream tcp nowait root internal
#chargen dgram udp wait root internal