09-06-2003
What do you mean by opening a port?
If an application server binds to the port to listen incoming traffic or have to send out any messages, the port must be open. Otherwise, it is closed. I don't think you will manually open a port.
Or do you mean to configure the firewall to enable certain ports that are otherwise blocked by default?
9 More Discussions You Might Find Interesting
1. Cybersecurity
/* Linux Slackware */
Nmap shows the following ports open on the gateway.
21/tcp ftp
22/tcp ssh
23/tcp telnet
25/tcp smtp
37/tcp time
80/tcp http
113/tcp auth
515/tcp printer
587/tcp submission
1024/tcp kdm
6000/tcp x11
-------------------------------
i would like to close as... (10 Replies)
Discussion started by: LowOrderBit
10 Replies
2. UNIX for Advanced & Expert Users
hi all
1) how to determine available ports in a box (solaris)
do i have to go for a netstat on all the ports?
2) how to block a particular port for a particular type of connection.
Any help would be greatly appreciated
Thanks (7 Replies)
Discussion started by: matrixmadhan
7 Replies
3. Shell Programming and Scripting
Hello, i need a script (bash type maybe?..), which would check open ports on 127.0.0.1 and then compare open ports with "registered/allowed" port list and try to kill the program who uses unregistered ports. It would be great that script would be started lets say every 5 or 10 minutes.
You see i... (2 Replies)
Discussion started by: MorchiuS
2 Replies
4. AIX
Hi Every body,
What is the command on AIX 5.2 that can be used to get all open ports? (2 Replies)
Discussion started by: aldowsary
2 Replies
5. UNIX for Dummies Questions & Answers
Hello,
I have a number of Solaris 8 Sun servers that have open ports that I cannot identify. I see some with 1012-1020 (which are reserved ports according to the IANA. Lsof does not identify these. One server has all these on and one server just has 1017.
*.1023 ... (3 Replies)
Discussion started by: csross
3 Replies
6. Solaris
Hello,
I have a number of Solaris 8 Sun servers that have open ports that I cannot identify. I see some with 1013-1023 (which are reserved ports according to the IANA. Lsof does not identify these. I rebooted the server and they went off, but this morning I saw they were all back on again. Any... (1 Reply)
Discussion started by: csgonan
1 Replies
7. Solaris
hi guys,
may i know the exact steps to open a port in solaris.i have some rough idea - which is adding the port number in /etc/services.
but i am not sure the correct conventions, steps or any other steps.
kindly advise.thanks guys ! (1 Reply)
Discussion started by: cromohawk
1 Replies
8. UNIX for Dummies Questions & Answers
just a quick question:
a. whats the simplest command to check open port and the corresponding services?
example:
bash-2.05# netstat -an | grep LISTEN
*.199 *.* 0 0 49152 0 LISTEN
*.8989 *.* 0 0 49152 ... (1 Reply)
Discussion started by: lhareigh890
1 Replies
9. IP Networking
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> <port_blocked> it shows connected..... (1 Reply)
Discussion started by: balamv
1 Replies
straps(8) Tnm Tcl Extension straps(8)
__________________________________________________________________________________________________________________________________________________
NAME
straps - A simple SNMP trap multiplexer.
SYNOPSIS
straps [ port ]
_________________________________________________________________
DESCRIPTION
The straps trap daemon listens on the snmp-trap port (usually port 162/udp) for incoming SNMP trap or inform messages and forwards them to
all connected clients (like scotty). The optional port argument allows to use the straps daemon to forward messages received on a non stan-
dard SNMP trap port. However, port numbers below 1024 will be rejected.
Clients connect to the straps daemon by opening the AF_UNIX domain stream socket /tmp/.straps-port. Thus, the default AF_UNIX domain stream
socket is named /tmp/.straps-162.
Received messages are forwarded using the following format:
4 byte IP address of the sender (network-byte-order).
2 byte Port number of the sender (network byte order).
4 byte Length of the trap message (host-byte-order).
n bytes The trap message itself.
The straps daemon must be installed setuid root because normal operating systems require root permissions to open the standard SNMP trap
port 162/udp. The straps daemon rejects all port numbers below 1024 in order to protect the system security.
SEE ALSO
scotty(1), tkined(1), Tnm(n)
AUTHORS
Erik Schoenfelder <schoenfr@gaertner.de>
Juergen Schoenwaelder <schoenw@cs.utwente.nl>
Tnm straps(8)