05-06-2011
Open/close of ports
Hi,
I have read some forum theads about the open and close ports. some points are clear and it is not working on my machine or something am i missing?
I have commented out a port /etc/services, one application uses
then when i use the telnet <hostname[localhost]> <port_blocked> it shows connected..
ideally it should not come right?
Or Am i missing anything here?
Thanks,
Bala
---------- Post updated at 06:23 PM ---------- Previous update was at 05:51 PM ----------
This is the steps I followed
1. I stopped the service which is running on 3500 port
2. checked the netstat -an | grep 3500 ==> no outputs
3. checked the port in /etc/services, it is commented out
4. ran this command
su root -c "/etc/init.d/xinetd restart"
Stopping xinetd: [ OK ]
Starting xinetd: [ OK ]
5. telnet mypc.com 3500
Trying 10.177.58.254...
telnet: connect to address 10.177.58.254: Connection refused
telnet: Unable to connect to remote host: Connection refused
This looks good, as expected i believe
6. Now I started the service on the port 3500
7. Service started successfully ?? How, it should not right?
8. Issue the telnet
telnet mypc.com 3500
Trying 10.177.58.254...
Connected to mypc.com (10.177.58.254).
Escape character is '^]'.
Now it is connected...
Am i somewhere wrong here?
I want to close the port.. but it is not working.
Pl assist me here.
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LEARN ABOUT DEBIAN
rxecho
RXECHO(8) Linux System Managers Manual RXECHO(8)
NAME
rxecho - Route AX.25 packets between ports transparently.
SYNOPSIS
rxecho [-l] [-v]
DESCRIPTION
Rxecho copies AX.25 frames between interfaces without altering their contents. The purpose of this utility is to allow other AX.25 aware
programs/computers to share the same AX.25 ports as the Linux kernel AX.25 code. It could be used to route packets out onto another serial
port to allow another machine running DOS based programs to share the same radio ports as the Linux machine, or it could route packets out
onto a pseudo-tty to another application on the same machine. The copying could even be to another radio port.
The copying of the packets is controlled by a configuration file rxecho.conf(5), which can be set up to selectively copy packets.
OPTIONS
-l Enables logging of errors to the system log, the default is off.
-v Display the version.
FILES
/etc/ax25/axports
/etc/ax25/rxecho.conf
SEE ALSO
axports(5), rxecho.conf(5), kissattach(8).
AUTHOR
Tomi Manninen OH2BNS <oh2bns@sral.fi>
Linux 15 October 1996 RXECHO(8)