We are being setup with a client over their VPN to support them remotely. We are unable to access their VPN through our server, they said to look and make sure that the TCP ports are enabled for their security setup (ports are in the 4000 range).
How do you look for this and how do you enable a... (3 Replies)
Hello all,
Can someone instruct me on how to change the listening port for ftp ( or any tcp service) from 21 to another port number? Thanks in advance..
-AJ (3 Replies)
Just starting to work with unix, wondering if there is any good on-line documentation explaining TCP/UDP ports, how to use them, etc...
Thanks.... (1 Reply)
Just wondering if anyone knows of any good on-line documentation on TCP/UDP Ports. Basically i want to know how to check if they are in use, learn how to close them, etc...
Thanks... (5 Replies)
What is the maximum number of TCP ports that can be consumed at any one time? How can I determine what the number is or increase it?
I was under the impression that with our system (UnixWare 7.1.1) 1024 was the maximum under our current Kernel tuning parms, but I think that is really just... (4 Replies)
In using a music file sharing program (WinMx), I am told that I
cannot make a primary connection (fastest downloads) because I do not
have a TCP and UDP port. I am running Windows Me.What do I do? Thanks. (6 Replies)
hi,
I'm currently running with an issue whereby we are experiencing very poor access speeds to our Informix database. Connections or requests to the DB are taking in excess of 2/3/4 minutes during peek periods during the day. This has only just started to happen but so far we have been unable to... (0 Replies)
I'm not sure if this is the right place for this post, but I'd be grateful if somebody could please help me. I'm trying to open ports 999, 1982 and 1983 but am not having much luck. I used
iptables -A INPUT -i eth0 -p tcp --sport 999 -m state --state NEW,ESTABLISHED -j ACCEPT
iptables -A INPUT -i... (2 Replies)
Hey guys,
I need to kill the process that is currently connected to port 10540. I'm on HP-UX machine.
Below is the result of my netstat.
$ netstat -an |grep 10540
tcp 0 0 129.0.0.1.10540 *.* LISTEN
We don't have lsof command, but we have fuser.
... (3 Replies)
How do i list the running process and also view the ports they are listening to at the same time? (3 Replies)
Discussion started by: mena
3 Replies
LEARN ABOUT CENTOS
listen
LISTEN(7) PostgreSQL 9.2.7 Documentation LISTEN(7)NAME
LISTEN - listen for a notification
SYNOPSIS
LISTEN channel
DESCRIPTION
LISTEN registers the current session as a listener on the notification channel named channel. If the current session is already registered
as a listener for this notification channel, nothing is done.
Whenever the command NOTIFY channel is invoked, either by this session or another one connected to the same database, all the sessions
currently listening on that notification channel are notified, and each will in turn notify its connected client application.
A session can be unregistered for a given notification channel with the UNLISTEN command. A session's listen registrations are
automatically cleared when the session ends.
The method a client application must use to detect notification events depends on which PostgreSQL application programming interface it
uses. With the libpq library, the application issues LISTEN as an ordinary SQL command, and then must periodically call the function
PQnotifies to find out whether any notification events have been received. Other interfaces such as libpgtcl provide higher-level methods
for handling notify events; indeed, with libpgtcl the application programmer should not even issue LISTEN or UNLISTEN directly. See the
documentation for the interface you are using for more details.
NOTIFY(7) contains a more extensive discussion of the use of LISTEN and NOTIFY.
PARAMETERS
channel
Name of a notification channel (any identifier).
NOTES
LISTEN takes effect at transaction commit. If LISTEN or UNLISTEN is executed within a transaction that later rolls back, the set of
notification channels being listened to is unchanged.
A transaction that has executed LISTEN cannot be prepared for two-phase commit.
EXAMPLES
Configure and execute a listen/notify sequence from psql:
LISTEN virtual;
NOTIFY virtual;
Asynchronous notification "virtual" received from server process with PID 8448.
COMPATIBILITY
There is no LISTEN statement in the SQL standard.
SEE ALSO NOTIFY(7), UNLISTEN(7)PostgreSQL 9.2.7 2014-02-17 LISTEN(7)