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Full Discussion: Linux (RHEL) and ports...
Top Forums UNIX for Dummies Questions & Answers Linux (RHEL) and ports... Post 302827999 by mcclunyboy on Monday 1st of July 2013 11:49:42 AM
Old 07-01-2013
Linux (RHEL) and ports...

Hi,

One of our applications running on RHEL is not working as expected - the application supplier has advised that a port is not allowing the correct traffic.

I know the port is open for incoming connections (checked with nmap and telnet) however is there a way I check the port is open for outgoing connections?

Iptables is disabled, so is SELinux.

Thanks
 

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SOCKET_CREATE_LISTEN(3) 						 1						   SOCKET_CREATE_LISTEN(3)

socket_create_listen - Opens a socket on port to accept connections

SYNOPSIS
resource socket_create_listen (int $port, [int $backlog = 128]) DESCRIPTION
socket_create_listen(3) creates a new socket resource of type AF_INET listening on all local interfaces on the given port waiting for new connections. This function is meant to ease the task of creating a new socket which only listens to accept new connections. PARAMETERS
o $port - The port on which to listen on all interfaces. o $backlog - The $backlog parameter defines the maximum length the queue of pending connections may grow to. SOMAXCONN may be passed as $backlog parameter, see socket_listen(3) for more information. RETURN VALUES
socket_create_listen(3) returns a new socket resource on success or FALSE on error. The error code can be retrieved with socket_last_error(3). This code may be passed to socket_strerror(3) to get a textual explanation of the error. NOTES
Note If you want to create a socket which only listens on a certain interface you need to use socket_create(3), socket_bind(3) and socket_listen(3). SEE ALSO
socket_create(3), socket_create_pair(3), socket_bind(3), socket_listen(3), socket_last_error(3), socket_strerror(3). PHP Documentation Group SOCKET_CREATE_LISTEN(3)
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