05-13-2009
Hi, please open a new thread next time instead of digging out this old one.
There is some information to your question already in this thread.
If you don't have an entry in your /etc/services, you can try with the command (if available) "lsof" if you can see what uses this port. Also you can check with netstat -a for example if it is up and what status it has.
For blocking ports you might want to use a firewall; depending on your system on Linux you could use ipchains/iptables.
10 More Discussions You Might Find Interesting
1. IP Networking
Hello
i have application that using ports , how can i check if the port im using is not captured by any applications? (1 Reply)
Discussion started by: umen
1 Replies
2. IP Networking
Hello Mentors!
I am a new here in the furom, i hope somebody can understand my problem.
Basically we have an application here called unigraphics and being installed per station and the setup is look like this.
1. installed unigraphics UGNX3 version on every station
2. some are installed in... (1 Reply)
Discussion started by: eykyn17
1 Replies
3. Solaris
Q1: can anyone tell me how cfgadm keeps track of the device even if the device is disconnected ,
when we disconnect a device using cfgadm
cfgadm -ys disconnect <ap_id>
then the device disappears from the lshal o/p. HAL uses libdevinfo for the device list. if the device is not there in the... (2 Replies)
Discussion started by: narendra.pant
2 Replies
4. Shell Programming and Scripting
Hi,
I need to create a script which checks the availability of a particular service on a particular Port on HP-Unix. Is there any command in unix wherein we can check if any port is accepting the connections now.
Thanks,
Vihang. (5 Replies)
Discussion started by: vikings.svnit
5 Replies
5. Shell Programming and Scripting
is there a better way to check if a port is active on linux and sunos systems?
this is currently what I'm using in my script:
netstat -an | egrep -i "$PORT"
i know this isn't the best way as there could be numbers in that output that has my port number in it but isn't necessarily a... (0 Replies)
Discussion started by: SkySmart
0 Replies
6. Shell Programming and Scripting
hi everybody;
my code is cheking if a port is an actif or not with the cmd netstat -ln,I want first to enter the number of the port which I want to check it but I think that the value of $con in the second "if" is always "0" so the code give me always that the port is not used!!!
... (5 Replies)
Discussion started by: bassma
5 Replies
7. Shell Programming and Scripting
We have open port UDP port 31011, how to verify if port were working or traffic were receive. (2 Replies)
Discussion started by: avtalan
2 Replies
8. Red Hat
I have RHEL 5.8 in our production environment. We are using SSL, my query is how to find the port used for SSL. In /etc/services, it shows 443 but when I give
netstat -tulpn | grep 443
Or
netstat -tulp | grep https
I do not get any output.
I hope, my question is clear of how to find... (4 Replies)
Discussion started by: RHCE
4 Replies
9. Shell Programming and Scripting
Hi,
How to check empty port using netstat please help
Thanks
Ashfaque (3 Replies)
Discussion started by: ashfaque
3 Replies
10. Shell Programming and Scripting
I have my firewall process running
# ps -ef | grep firewall
root 21169 1 0 08:50 ? 00:00:00 /usr/bin/python -Es /usr/sbin/firewalld --nofork --nopid
I wish to know what ip : port number it is using. Can you please tell me how can i find out ?
I tried the below command... (4 Replies)
Discussion started by: mohtashims
4 Replies
LEARN ABOUT SUSE
tnm::udp
udp(n) Tnm Tcl Extension udp(n)
__________________________________________________________________________________________________________________________________________________
NAME
udp - Send and receive UDP datagrams.
_________________________________________________________________
DESCRIPTION
The udp command allows to send and receive datagrams using the User Datagram Protocol (UDP) (RFC 768).
UDP COMMAND
udp open [port]
The udp open command opens a UDP datagram socket and returns an udp handle. The socket is bound to given port number or name. An
unused port number is used if the port argument is missing.
udp connect host port
The udp connect command opens a UDP datagram socket and connects it to a port on a remote host. A connected UDP socket only allows
to send messages to a single destination. This usually allows to shorten the code since there is no need to specify the destination
address for each udp send command on a connected UDP socket. The command returns a udp handle.
udp send handle [host port] message
The udp send command sends a datagram containing message to the destination specified by host and port. The host and port arguments
may not be used if the UDP handle is already connected to a transport endpoint. If the UDP handle is not connected, you must use
these optional arguments to specify the destination of the datagram.
udp receive handle
The udp receive command receives a datagram from the UDP socket associated with handle. This command blocks until a datagram is
ready to be received. In most cases, it might be a good idea to check for pending datagrams using the udp bind command.
udp close handle
The udp close command closes the UDP socket associated with handle.
udp bind handle readable [script]
udp bind handle writable [script]
The udp bind command allows to bind scripts to a UDP handle. A script is evaluated once the UDP handle becomes either readable or
writable, depending on the third argument of the udp bind command. The script currently bound to a UDP handle can be retrieved by
calling the udp bind command without a script argument. Bindings are removed by binding an empty string.
udp info [handle]
The udp info command without the handle argument returns a list of all existing UDP handles. Information about the state of a UDP
handle can be obtained by supplying a valid UDP handle. The result is a list containing the source IP address, the source port, the
destination IP address and the destination port.
SEE ALSO
scotty(1), Tnm(n), Tcl(n)
AUTHORS
Juergen Schoenwaelder <schoenw@cs.utwente.nl>
Tnm udp(n)