9 replies to this topic

[Nur Ab Sal]

Hi all, I'm trying to write a C++ or java program that, for example using telnet, can open and close the router ports.
The router is a normal router Digicom Wavegate 108.
The pc is connected to the router via ethernet or via internet.

Do you think is this possible? Are there some universal telnet commands or i have to edit some files into the router?

Thank you all

[WingedPanther]

It's certainly possible. You'll just have to write a program that emulates the calls that you normally make via your browser.

[Nur Ab Sal]

Yes you're right, but with telnet it would be a more elegant solution and it would work even when another (human) administrator is using the router

[WingedPanther]

You can only use whatever methods the router supports. If it supports a standard telnet connection, then fine. Telnetting to port 80 is the same as connecting to it the way a browser would.

[Nur Ab Sal]

ok i'm trying to get authenticated into my router. Manually i do:
telnet 192.168.0.1 80
enter
get / http/1.0
enter
Authentication: Basic username:passwdbase64
and i get as response:
HTTP/1.0 200 OK
Content-type etc

But if i try to write a c program using

system("telnet 192.168.0.1 80");

naturally it closes my program and it starts telnet waiting manual input.
How can i automatically communicate with the router?

I tried in Java too, using something like this:

        URL router= new URL("192.168.0.1");

        URLConnection yc = router.openConnection();

        BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream()));

        String inputLine;

        while ((inputLine = in.readLine()) != null) 

            System.out.println(inputLine);

        in.close();

but it tells me 401 unauthorized

what can i do?

[mebob]

You can't use the system() command to do that in C, you need to either use Sockets (Winsock for windows) or use some kind of networking library.

[Nur Ab Sal]

Hi, thank you for the replies. Now I'm following WingedPanther advice. I wrote a simple Java method that emulates browser interactions.
I used Authenticator class to login and then I tried to add a rule with this code:

router = new URL("http://192.168.0.1/setup.cgi");

HttpURLConnection hConnection = (HttpURLConnection) router.openConnection();

hConnection.setFollowRedirects(true);

hConnection.setDoOutput(true);

hConnection.setRequestMethod("POST");

PrintStream ps = new PrintStream(hConnection.getOutputStream());

            ps.print("service_list=Any(ALL)&" +

                    "fwout_action=0&" +

                    "fwout_laniptype=singleip&" +

                    "lan_start_ip1=192&" +

                    "lan_start_ip2=168&" +

                    "lan_start_ip3=0&" +

                    "lan_start_ip4=99&" +

                    "lan_finish_ip1=192&" +

                    "lan_finish_ip2=168&" +

                    "lan_finish_ip3=0&" +

                    "lan_finish_ip4=99&" +

                    "fwout_waniptype=anyip&" +

                    "wan_start_ip1=192&" +

                    "wan_start_ip2=168&" +

                    "wan_start_ip3=0&" +

                    "wan_start_ip4=99&" +

                    "wan_finish_ip1=192&" +

                    "wan_finish_ip2=168&" +

                    "wan_finish_ip3=0&" +

                    "wan_finish_ip4=99&" +

                    "fwout_logging=1&" +

                    "todo=save&" +

                    "this_file=rule_out.htm&" +

                    "next_file=fw_rules.htm&" +

                    .........

i tried to define all the parameters that i found in the html code of the form. But when i send the request i get as response some html code with this at the
<script> alert("IP addres is not valid!"); </script><script> location.href="setup.cgi?next_file=rule_out.htm"; </script>

Now i don't know... is there any way to see if the HTTP request that i send is valid and the parameters well formatted?
or better.. is there any way to inspect the HTTP request that normally the browser sends to router when i submit the form?

[mebob]

What does your router page look like (screenshot) and what is its HTML source?

[Nur Ab Sal]

sorry i forgot to reply saying that, thanks to chrome, i found the right parameters to send to the router and now works fine

[mebob]

Oh ok, cool :D