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Full Discussion: How to check the TCP/UDP port of a connection
Top Forums UNIX for Dummies Questions & Answers How to check the TCP/UDP port of a connection Post 302073816 by tayyabq8 on Thursday 18th of May 2006 12:55:24 AM
Old 05-18-2006
Host refused connection
Hi,

Actually, I want to know the port where the remote party is coming from. Any ways, I checked my syslog after logging in from the same client and found the following:
Code:
May 17 15:53:43 unix1 in.telnetd[10742]: connect from AGB

It means my KCML client, comes thru telnet(TCP port 23), I forwarded this port 23 from my router to UNIX box(for Remot users i.e. comming from the internet), it reaches UNIX because I can see its log in syslog. But client gets "Host refused connection". There is no problem for the connections comming from local subnet or from the subnets for routes are already added. I checked my /etc/inetd.conf file and found following there:
Code:
telnet  stream  tcp     nowait  root    /usr/sbin/in.tcpd       in.telnetd
telnet  stream  tcp     nowait  root    /usr/sbin/in.telnetd    in.telnetd

So this is not the problem either, as well as hosts.allow has the entry to allow telnet comming from unknown host. I tried to telnet UNIX box from the Internet, but no luck. My default gateway is set properly also and system accepts connections from VPN without any problem, so there is no problem for the connections from unknown hosts.

And I don't know also where system logs the record of rejected connections. I'm totally blank here. Any idea.....

FYI, I'm at SCO UNIXWARE 7.1.1.


Regards,
Tayyab
Last edited by tayyabq8; 05-18-2006 at 02:08 AM..
 

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LEARN ABOUT DEBIAN

portslave

portslave(8)							     Portslave							      portslave(8)

NAME

       portslave - terminal server program.

SYNOPSIS

       portslave [+config-file] port|-

DESCRIPTION

       This manual page documents briefly the portslave, program.

       This program is a getty replacement that will run it's own version of pppd, the user can specify their user-name via a login: prompt or PPP
       PAP negotiation.

       After the username and password have been supplied the user will be authenticated by the RADIUS protocol.

OPTIONS

       An optional first parameter is '+config-file' to specify an alternate config file.  The default is /etc/portslave/pslave.conf .

       The next parameter is either the port number or '-'.  The value '-' means that portslave is to use  it's  controlling  tty  as  the  serial
       device  and  inspect  the  config  file to find the RADIUS port number which matches that.  This was originally written for telnetd support
       (telnetd puts a '-' as the first command line parameter) but can be used for other things.

       To run over the telnet protocol put a config entry similar to the following in your inetd configuration:

       telnet stream tcp nowait root /usr/sbin/tcpd /usr/sbin/in.telnetd -L /usr/sbin/portslave

       Then in the pslave.conf file put a series of entries specifying every pseudo-tty device (either ptyp0,  ptyp1,  etc  or	pts/1,	pts/2  etc
       depending  on which type of device naming you use).  For the RADIUS port numbers which are to be used for telnet connections you must spec-
       ify the initchat as an empty string.

       If you want to run portslave over a clean TCP connection (no telnet protocol) then put the following in your inetd configuration:

       telnet stream tcp nowait root /usr/sbin/tcpd /usr/sbin/portslave -

AUTHOR

       This man page was written by Russell Coker <russell@coker.com.au>.  May be freely used and distributed without restriction.

SEE ALSO

       pslave.conf(5), pppd(8), ctlportslave(1) http://doc.coker.com.au/projects/portslave/

Russell Coker <;russell@coker.com.au>				    2010.03.30							      portslave(8)
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