Linux, telnet, nmap...?

Question

See where I'm going? Okay so here's the deal. I'm trying to hack into my own system using linux so I can figure out the weaknesses & resolve them. Only problem is I've never hacked before. I'm reading a book that tells me the basics, so using nmap I scanned my router & found port 443 open. The book tells me once I find an open port, I should telnet into it. I've used telnet, so that's no big deal. I open telnet, type "open 192.168.0.101 443" and here's what I get:

Trying 192.168.0.101...
Connected to 192.168.0.101.
Escape character is '^]'.

But then nothing. No login, no response from the computer at all. I'm at a loss, so I start guessing. I type "ls" and get nothing. I type "list" and get nothing. Then I type "ftp" and it responds

Connection closed by foreign host.

Then it boots me back to the root terminal. My question is this.. once I have the initial connection, WTF do I do to penetrate/exploit?

Further info- It's the router I'm actually trying to get into. I get the same results if I'm trying to hack my laptop or my router. Help?

Okay... turns out I wasn't hacking into my router, I was hacking into my Tivo... and Tivo's apparently use linux, so you all know! nmap identified it as a linux OS. Anyway, what I'm trying to do is break into my own network. If I can do that, then I know my network is not secure. I don't want anybody else doing it, so I have to wing it. The problem is, like I mentioned, I don't know how. I need somebody with experience to help.

Answer 1

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Answer 2

It's not entirely clear what are you trying to achieve, but here's the thing with port 443 that may help you.

Port 443 is typically HTTPS, so plain telnet will not work on it - all communications over it are encrypted using SSL.

To get equivalent of Telnet into SSL port, download OpenSSL and use it like this:

openssl s_client -connect 192.168.0.101:443

Then type "GET /" or something like that.

Or better yet, point your browser to
https://192.168.0.101


----- added -----

The really good test of whether or not your network is secure would be to run scanner from outside - i.e. from your office or somebody else's computer - not from inside your home network.

Router provides reasonably good protection from outside attacks by blocking all incoming ports, so I wouldn't worry too much about that.

If you're really paranoid, though, I suggest heavy weaponry like GFI LanGuard Security Scanner:

http://www.gfi.com/languard/

That thing will likely reveal more vulnerabilities than nmap and will describe them more meaningfully.

Answer 3

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