Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Socket Programming - Port Scanner. I Get Connection Timed Out, Why?
Top Forums Programming Socket Programming - Port Scanner. I Get Connection Timed Out, Why? Post 302252025 by f.ben.isaac on Tuesday 28th of October 2008 03:52:44 PM
Old 10-28-2008
Quote:
Well, perhaps there's a firewall (or at least IP packet filter) dropping the packets.
You are right. This port scanner is made so simple, not stealthy & does not pass any firewall. Otherwise, it should scan normally.

It works best if you use it in your network internally, or use against your machine.

I opened a port from terminal by doing

sudo nc -l -p AnyPortNumber

Then tested the program, It worked!

Note - Instead of doing this

struct sockaddr_in *specifyPort = (struct sockaddr_in *)results->ai_addr;
specifyPort->sin_port = htons(startingPort);

Do this,

status = getaddrinfo(remoteIP, startingPort , &hints, &results);

Better & easier.
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Connection Timed out

I connect to a Sun Box through telnet but it timed out in couple of minutes. Advance thanks for any idea...help... (2 Replies)
Discussion started by: s_aamir
2 Replies

2. UNIX for Advanced & Expert Users

deferred: connection timed out with NT

We recently installed a new release of SCO UNIX (5.0.6) and when I try to relay e-mail from the UNIX box to my NT server (the mail server) I get the following message from sendmail. Deferred: Connection timed out with nt I have nt set up as my relay server in sendmail.cf and the mail seems to... (8 Replies)
Discussion started by: jmossman
8 Replies

3. UNIX for Advanced & Expert Users

TCP port scanner for remote or for local

I am unable to find any TCP scanner for data captruing for a Remote or local server. Can anybody please help. i need it to read TCP port and capture the incoming/outgoing data , (3 Replies)
Discussion started by: fahadsiddiqui
3 Replies

4. Linux Benchmarks

Connection Timed out problem - EM64T

Hai All, I have problem during HTTP benchmarking with polygraph tool on EM64T machine. Benchmarking results are getting problem bcas of connection timed out system errors. Machine log information is as, /var/log/messages.3:Feb 18 16:17:44 proxy64 network: Bringing up interface eth0: ... (0 Replies)
Discussion started by: muthukumar
0 Replies

5. HP-UX

connection timed out

I am trying to connect with my hp machine using "dialup networking." It times out after 30 seconds. Is there a way to adjust this time. Would it have anything to do with rexec? thanks (0 Replies)
Discussion started by: paschal
0 Replies

6. UNIX for Dummies Questions & Answers

Socket programming:One server two port

I want my server socket to listen on two ports in my machine. How do i achieve it? I will have two clients one connecting to 1 port and another to a different port. So my server needs to listen to both. Thanks. (1 Reply)
Discussion started by: abc.working
1 Replies

7. Programming

Cloning a socket connection, using other port numbers

Hello everybody, I've coded a multi-client server based on internet sockets using the scheme listen on port X-accept-fork, exactly like beej's guide At some point I would like to establish a secondary connection between a client and the server-child serving him. I was considering the... (4 Replies)
Discussion started by: jonas.gabriel
4 Replies

8. Solaris

Solaris 10 ftp connection problem (connection refused, connection timed out)

Hi everyone, I am hoping anyone of you could help me in this weird problem we have in 1 of our Solaris 10 servers. Lately, we have been having some ftp problems in this server. Though it can ping any server within the network, it seems that it can only ftp to a select few. For most servers, the... (4 Replies)
Discussion started by: labdakos
4 Replies

9. Programming

socket programming using UDP connection

I want to send packets through single socket() but using two different port numbers in UDP. Anybody give some idea on this. Thanks in advance.:) (2 Replies)
Discussion started by: naresh046
2 Replies

10. AIX

Ssh connection timed out

Hello, I have two AIX6.1 machines that can communicate with each other through ssh. The problem is that one of them somehow closes the connection after some time and i don't know the reason of that. For example today i send through rsync command 7 files from one server to the other. It send... (7 Replies)
Discussion started by: omonoiatis9
7 Replies

LEARN ABOUT DEBIAN

gchem3d

GCHEM3D(1)						       gnome-chemistry-utils							GCHEM3D(1)

NAME

       gchem3d - a small chemical viewer application

SYNOPSIS

       gchem3d [OPTION(S)...] [FILE...]

DESCRIPTION

       gchem3d is a small chemical viewer application, which can show several chemical file formats.

OPTIONS

       The following options are accepted:

       -b COLOR, --bgcolor=COLOR
	   Use the given color as background color.  COLOR can be one of "black" (default), "white", "#rrggbb" (don't forget to escape the "#"
	   character in the shell).

       -d MODEL, --display3d=MODEL
	   Choose how molecules are displayed.	MODEL can be one of "BallnStick" (default), "SpaceFill".

       -?, --help
	   Show application help options.

       --help-all, --help-*
	   Print all or just a group of help options. These options are not documented here. Instead see gtk-options(7) and gnome-options(7).

       -v, --version
	   Print gchem3d version information.

SEE ALSO

       gnome-options(7), gtk-options(7)

AUTHORS

       Jean Brefort <jean.brefort@normalesup.org>
	   Program author.

       Daniel Leidert <daniel.leidert@wgdd.de>
	   Manpage author.

COPYRIGHT

       Copyright (C) 2002-2007 Jean Brefort
       Copyright (C) 2004-2007 Daniel Leidert

       Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 or any
       later version published by the Free Software Foundation.

gcu 0.12				      $Date: 2009-03-19 10:53:47 +0100 (jeu. 19 mars 2009) $					GCHEM3D(1)
All times are GMT -4. The time now is 09:34 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy