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?
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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)
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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
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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.
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Hi Every body,
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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)
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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)
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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.
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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
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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
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LEARN ABOUT DEBIAN
ka-forwarder
KA-FORWARDER(8) AFS Command Reference KA-FORWARDER(8)
NAME
ka-forwarder - Forward AFS Authentication Server requests to another server
SYNOPSIS
ka-forwarder [-p <port>] <server>[/<port>] [...]
DESCRIPTION
ka-forwarder listens for requests for an AFS Authentication Server and forwards them to a remove fakeka server. fakeka is a server that
answers AFS Authentication Server protocol requests using a regular Kerberos KDC and is provided with some Kerberos 5 implementations.
fakeka has to run on the same host as the Kerberos KDC, however, and AFS clients send all native AFS authentication requests to the AFS
database servers. If you don't want to run your Kerberos KDCs and your AFS database servers on the same host, run ka-forwarder on the AFS
database servers and point it to fakeka running on the Kerberos KDCs.
ka-forwarder takes one or more servers to which to forward the requests. The default port on the remote server to which to forward the
command is 7004, but a different port can be specified by following the server name with a slash ("/") and the port number. If multiple
servers are given, ka-forwarder will send queries to each server in turn in a round-robin fashion.
CAUTIONS
Due to the way that ka-forwarder distinguishes from client requests and server responses, any messages from one of the servers to which ka-
forwarder is forwarding will be considered a reply rather than a command and will not be forwarded. This means that the servers running
fakeka will not be able to use native AFS authentication requests and rely on ka-forwarder to send the requests to the right server.
ka-forwarder does not background itself. It should either be run in the background via the shell, or run via the Basic OverSeer Server
(see bosserver(8)).
OPTIONS
-p <port>
By default, ka-forwarder listens to the standard AFS Authentication Server port (7004). To listen to a different port, specify it with
the -p option.
EXAMPLES
Forward AFS Authentication Server requests to the fakeka servers on kdc1.example.com and kdc2.example.com:
% ka-forwarder kdc1.example.com kdc2.example.com &
Note the "&" to tell the shell to run this command in the background.
PRIVILEGE REQUIRED
ka-forwarder only has to listen to port 7004 and therefore does not require any special privileges unless a privileged port is specified
with the -p option.
SEE ALSO
bosserver(8), fakeka(8), kaserver(8)
COPYRIGHT
Copyright 2006 Russ Allbery <rra@stanford.edu>
This documentation is covered by the IBM Public License Version 1.0. This man page was written by Russ Allbery for OpenAFS.
OpenAFS 2012-03-26 KA-FORWARDER(8)