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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 SUNOS

in.echod

in.echod(1M)						  System Administration Commands					      in.echod(1M)

NAME

       in.echod - UDP or TCP echo protocol service daemon

SYNOPSIS

       in.echod

       FMRI
       svc:/internet/echo:default

DESCRIPTION

       FMRI  stands  for  Fault  Management  Resource  Identifier.  It is used to identify resources managed by the Fault Manager. See fmd(1M) and
       smf(5).

       The in.echod service provides the server-side of the echo protocol. This protocol is used for debugging and bandwidth  measurement  and	is
       available on both TCP and UDP transports, through port 7.

       The in.echod service is an inetd(1M) smf(5) delegated service. The in.echod detects which transport is requested by examining the socket it
       is passed by the inetd daemon.

       TCP-based service

	   Once a connection is established, the in.echod echoes any data received from the client back to the	client.  The  server  echoes  data
	   until the client program terminates the connection.

       UDP-based service

	   The	in.echod listens for UDP datagrams. When a datagram is received, the server creates a UDP datagram containing the data it received
	   and sends it to the client.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNW			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       inetd(1M), attributes(5), smf(5)

       RFC 862

SunOS 5.10							    23 Aug 2004 						      in.echod(1M)
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