Tool to Break Firewall in Linux

Lakshmana

Break means to integrate the other machine into the machine where I am having the firewall and need to get access of the firewall configured machine

scottalanmiller

Do you mean "open a port?"

Lakshmana

PLease see the scenario I am having.

I have deny all the ports in one ubuntu machine and allowed only specific ports.
I need to access that machine only by knowing the username and password

coliver

@Lakshmana said:

PLease see the scenario I am having.

I have deny all the ports in one ubuntu machine and allowed only specific ports.
I need to access that machine only by knowing the username and password

Do you have SSH port 22 open?

Lakshmana

NO.I have not opened that port for SSH

Lakshmana

But having other port number for the SSH

coliver

@Lakshmana said:

But having other port number for the SSH

So the SSH service is listening on a different port other then 22? If that is the case just ssh (or putty) to ipaddress:port.

Lakshmana

I can able to take ssh in the other port .But I need to find the port which is enabled for the server

scottalanmiller

@Lakshmana said:

PLease see the scenario I am having.

I have deny all the ports in one ubuntu machine and allowed only specific ports.
I need to access that machine only by knowing the username and password

So you want to SSH into it. From what you have described I cannot tell where you have an issue. If the SSH port is open, it should "just work". Maybe show us what you mean instead of trying to describe it.

Lakshmana

I just need to test my firewall as a intruder who does not know about the details of the port which are enabled in the firewall.

coliver

@Lakshmana said:

I just need to test my firewall as a intruder who does not know about the details of the port which are enabled in the firewall.

Ah, you will want to look up the nmap utility, this will tell you which ports are open... although not sure if it will find out what services are listening on that port. You can install it with:

sudo apt-get install nmap

Then use something like this to get the port information:

nmap ipaddress -p 1-40000

Here is some info on nmap. http://nmap.org/book/man-port-scanning-basics.html

scottalanmiller

@Lakshmana said:

I just need to test my firewall as a intruder who does not know about the details of the port which are enabled in the firewall.

Ah, testing is not related to "breaking" or "integrating" or "accessing." Using those words led us down the garden path.