Solved

Blocking a Port on UNIX

Posted on 2000-08-06
2
231 Views
Last Modified: 2010-04-02
Hi,

Can i block any of the port as per my requirements to be blocked for everybody in UNIX/Linux.
0
Comment
Question by:srinivas_rc
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 4

Expert Comment

by:saurabh_dasgupta
ID: 3801035
What do you mean by blocking ?

Are you saying that you want to run a particular service at some exclusive port number ? Just like how Telnet runs on 23 and HTTP runs on 80 ..??
0
 
LVL 1

Accepted Solution

by:
Ries earned 50 total points
ID: 3817196
Dependinf on you kernel you should use ipfwadm or ipchains.
I think 2.0.x kernels have already the ability to use ipchains. Take a look at the docs they are well documented.
man ipfwadm or man ipchains will give you the answers. If you need a sample, just lett me know. I did setup a firall at our office using ipfwadm on a Linux machine

Ries
0

Featured Post

On Demand Webinar - Networking for the Cloud Era

This webinar discusses:
-Common barriers companies experience when moving to the cloud
-How SD-WAN changes the way we look at networks
-Best practices customers should employ moving forward with cloud migration
-What happens behind the scenes of SteelConnect’s one-click button

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Unlike C#, C++ doesn't have native support for sealing classes (so they cannot be sub-classed). At the cost of a virtual base class pointer it is possible to implement a pseudo sealing mechanism The trick is to virtually inherit from a base class…
Templates For Beginners Or How To Encourage The Compiler To Work For You Introduction This tutorial is targeted at the reader who is, perhaps, familiar with the basics of C++ but would prefer a little slower introduction to the more ad…
The goal of the video will be to teach the user the concept of local variables and scope. An example of a locally defined variable will be given as well as an explanation of what scope is in C++. The local variable and concept of scope will be relat…
The viewer will learn additional member functions of the vector class. Specifically, the capacity and swap member functions will be introduced.

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question