Enabling Telnet Console on Certain Netgear Routers

[Re@lity]

If you want to telnet into a "feature locked" Netgear router, such as Sky's Netgear DG836G routers, simply issue this call to the routers IP:

http://192.168.0.1/setup.cgi?todo=debug

Now you can access Busybox in full, including telnet access

[fastboi]

If you want to telnet into a "feature locked" Netgear router, such as Sky's Netgear DG836G routers, simply issue this call to the routers IP:

http://192.168.0.1/setup.cgi?todo=debug

Now you can access Busybox in full, including telnet access

Thanks for suggestion, but unfortunately it doesn't do the trick on WGR614v7 :|

[Re@lity]

I have only really tested it on the "DG" family of routers, but anything is always worth a shot

[Virchanza]

We can see that there are many warnings when you compile the program.

That first warning you're getting is about an "implicit function declaration". Normally in C, you have to declare something before you can use it (be it a type, a variable, an object, or a function), otherwise you get an "unrecognised identifier" error. Unfortunately in the early days of C, somebody thought it would be a good idea to put in "implicit function declarations" whereby even if a function hasn't been declared yet, the compiler will act as if the function were declared as returning int and taking a variable amount of arguments (i.e. int Func(...)). This turned out to be a very bad idea. You're getting those warning because neither "memset" nor "memmove" have been declared. To declare these functions, you have to include <memory.h>. You should never ignore warnings about "implicit function declaration", they're such a nuisance that they've been outlawed in the latest standard of C, i.e. C99. There's a commandline switch for gcc to disable implicit function declarations, -Werror-implicit-function-declaration, it's just a shame that it's not turned on by default, it would save a lot of bother. You should never ignore this error, and I'm actually surprised your program works properly with those implicit function declarations.

The second error you're getting is about an "incompatible pointer type". A function takes a "pointer to non-const" as its argument, and you're supplying it with a "pointer to const", so there's a conflict. For instance:

int Func(int *p)
{
    return *p;
}

int main(void)
{
    int const i = 5;

    Func(&i);  /* Giving a "pointer to const" instead of "pointer to non-const */
}

You'll get the same warning if you give a "pointer to volatile" instead of a "pointer to non-volatile".

[bones]

I am having trouble compiling it on the USB version of BT3. Any ideas?

gcc -o telnetenable md5.c blowfish.c telnetenable.c
md5.c:1: error: expected identifier or '(' before '<' token
md5.c:10: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
md5.c:12:24: error: invalid suffix "px" on integer constant
md5.c:13: error: stray '#' in program
md5.c:17: error: expected identifier or '(' before '.' token
md5.c:24:12: error: invalid preprocessing directive #sites
md5.c:25: error: expected '=', ',', ';', 'asm' or '__attribute__' before '-' token
md5.c:25: error: stray '#' in program
md5.c:26: error: expected '=', ',', ';', 'asm' or '__attribute__' before '-' token
md5.c:26:28: error: invalid suffix "px" on integer constant
md5.c:26: error: stray '#' in program
md5.c:27: error: expected '=', ',', ';', 'asm' or '__attribute__' before ':' token
md5.c:28: error: expected '=', ',', ';', 'asm' or '__attribute__' before ':' token
md5.c:28:22: error: invalid suffix "px" on integer constant
md5.c:28:26: error: invalid suffix "px" on integer constant
md5.c:29: error: expected '=', ',', ';', 'asm' or '__attribute__' before '-' token
md5.c:29:28: error: invalid suffix "px" on integer constant
md5.c:30: error: expected identifier or '(' before '}' token
md5.c:31: error: expected identifier or '(' before '.' token
md5.c:33:24: error: invalid suffix "px" on integer constant
md5.c:34:22: error: invalid suffix "px" on integer constant
md5.c:34:26: error: invalid suffix "px" on integer constant
md5.c:34:30: error: invalid suffix "px" on integer constant
md5.c:36: error: expected identifier or '(' before '.' token
md5.c:37: error: stray '#' in program
md5.c:37:21: error: invalid suffix "dbf" on floating constant
md5.c:39: error: expected identifier or '(' before '.' token
md5.c:40:25: error: invalid suffix "px" on integer constant
md5.c:41:23: error: invalid suffix "px" on integer constant
md5.c:42:22: error: invalid suffix "px" on integer constant
md5.c:43:22: error: invalid suffix "px" on integer constant
md5.c:45: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
md5.c:46:21: error: invalid suffix "px" on integer constant
md5.c:46:27: error: invalid suffix "px" on integer constant
md5.c:47:24: error: invalid suffix "px" on integer constant
md5.c:49: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
md5.c:50:25: error: invalid suffix "px" on integer constant
md5.c:52: error: expected identifier or '(' before '.' token
md5.c:53:24: error: invalid suffix "px" on integer constant
md5.c:54:22: error: invalid suffix "px" on integer constant
md5.c:54:28: error: invalid suffix "px" on integer constant
md5.c:57: error: expected identifier or '(' before '.' token
md5.c:59:22: error: invalid suffix "px" on integer constant
md5.c:61: error: expected identifier or '(' before '.' token
md5.c:62:24: error: invalid suffix "px" on integer constant
md5.c:64:12: error: invalid preprocessing directive #sites
md5.c:65: error: expected '=', ',', ';', 'asm' or '__attribute__' before '-' token
md5.c:65:28: error: invalid suffix "px" on integer constant
md5.c:66: error: expected identifier or '(' before '}' token
md5.c:67: error: expected identifier or '(' before '<' token
blowfish.c:1: error: expected identifier or '(' before '<' token
blowfish.c:10: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
blowfish.c:12:24: error: invalid suffix "px" on integer constant
blowfish.c:13: error: stray '#' in program
blowfish.c:17: error: expected identifier or '(' before '.' token
blowfish.c:24:12: error: invalid preprocessing directive #sites
blowfish.c:25: error: expected '=', ',', ';', 'asm' or '__attribute__' before '-' token
blowfish.c:25: error: stray '#' in program
blowfish.c:26: error: expected '=', ',', ';', 'asm' or '__attribute__' before '-' token
blowfish.c:26:28: error: invalid suffix "px" on integer constant
blowfish.c:26: error: stray '#' in program
blowfish.c:27: error: expected '=', ',', ';', 'asm' or '__attribute__' before ':' token
blowfish.c:28: error: expected '=', ',', ';', 'asm' or '__attribute__' before ':' token
blowfish.c:28:22: error: invalid suffix "px" on integer constant
blowfish.c:28:26: error: invalid suffix "px" on integer constant
blowfish.c:29: error: expected '=', ',', ';', 'asm' or '__attribute__' before '-' token
blowfish.c:29:28: error: invalid suffix "px" on integer constant
blowfish.c:30: error: expected identifier or '(' before '}' token
blowfish.c:31: error: expected identifier or '(' before '.' token
blowfish.c:33:24: error: invalid suffix "px" on integer constant
blowfish.c:34:22: error: invalid suffix "px" on integer constant
blowfish.c:34:26: error: invalid suffix "px" on integer constant
blowfish.c:34:30: error: invalid suffix "px" on integer constant
blowfish.c:36: error: expected identifier or '(' before '.' token
blowfish.c:37: error: stray '#' in program
blowfish.c:37:21: error: invalid suffix "dbf" on floating constant
blowfish.c:39: error: expected identifier or '(' before '.' token
blowfish.c:40:25: error: invalid suffix "px" on integer constant
blowfish.c:41:23: error: invalid suffix "px" on integer constant
blowfish.c:42:22: error: invalid suffix "px" on integer constant
blowfish.c:43:22: error: invalid suffix "px" on integer constant
blowfish.c:45: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
blowfish.c:46:21: error: invalid suffix "px" on integer constant
blowfish.c:46:27: error: invalid suffix "px" on integer constant
blowfish.c:47:24: error: invalid suffix "px" on integer constant
blowfish.c:49: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
blowfish.c:50:25: error: invalid suffix "px" on integer constant
blowfish.c:52: error: expected identifier or '(' before '.' token
blowfish.c:53:24: error: invalid suffix "px" on integer constant
blowfish.c:54:22: error: invalid suffix "px" on integer constant
blowfish.c:54:28: error: invalid suffix "px" on integer constant
blowfish.c:57: error: expected identifier or '(' before '.' token
blowfish.c:59:22: error: invalid suffix "px" on integer constant
blowfish.c:61: error: expected identifier or '(' before '.' token
blowfish.c:62:24: error: invalid suffix "px" on integer constant
blowfish.c:64:12: error: invalid preprocessing directive #sites
blowfish.c:65: error: expected '=', ',', ';', 'asm' or '__attribute__' before '-' token
blowfish.c:65:28: error: invalid suffix "px" on integer constant
blowfish.c:66: error: expected identifier or '(' before '}' token
blowfish.c:67: error: expected identifier or '(' before '<' token
telnetenable.c:1: error: expected identifier or '(' before '<' token
telnetenable.c:10: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
telnetenable.c:12:24: error: invalid suffix "px" on integer constant
telnetenable.c:13: error: stray '#' in program
telnetenable.c:17: error: expected identifier or '(' before '.' token
telnetenable.c:24:12: error: invalid preprocessing directive #sites
telnetenable.c:25: error: expected '=', ',', ';', 'asm' or '__attribute__' before '-' token
telnetenable.c:25: error: stray '#' in program
telnetenable.c:26: error: expected '=', ',', ';', 'asm' or '__attribute__' before '-' token
telnetenable.c:26:28: error: invalid suffix "px" on integer constant
telnetenable.c:26: error: stray '#' in program
telnetenable.c:27: error: expected '=', ',', ';', 'asm' or '__attribute__' before ':' token
telnetenable.c:28: error: expected '=', ',', ';', 'asm' or '__attribute__' before ':' token
telnetenable.c:28:22: error: invalid suffix "px" on integer constant
telnetenable.c:28:26: error: invalid suffix "px" on integer constant
telnetenable.c:29: error: expected '=', ',', ';', 'asm' or '__attribute__' before '-' token
telnetenable.c:29:28: error: invalid suffix "px" on integer constant
telnetenable.c:30: error: expected identifier or '(' before '}' token
telnetenable.c:31: error: expected identifier or '(' before '.' token
telnetenable.c:33:24: error: invalid suffix "px" on integer constant
telnetenable.c:34:22: error: invalid suffix "px" on integer constant
telnetenable.c:34:26: error: invalid suffix "px" on integer constant
telnetenable.c:34:30: error: invalid suffix "px" on integer constant
telnetenable.c:36: error: expected identifier or '(' before '.' token
telnetenable.c:37: error: stray '#' in program
telnetenable.c:37:21: error: invalid suffix "dbf" on floating constant
telnetenable.c:39: error: expected identifier or '(' before '.' token
telnetenable.c:40:25: error: invalid suffix "px" on integer constant
telnetenable.c:41:23: error: invalid suffix "px" on integer constant
telnetenable.c:42:22: error: invalid suffix "px" on integer constant
telnetenable.c:43:22: error: invalid suffix "px" on integer constant
telnetenable.c:45: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
telnetenable.c:46:21: error: invalid suffix "px" on integer constant
telnetenable.c:46:27: error: invalid suffix "px" on integer constant
telnetenable.c:47:24: error: invalid suffix "px" on integer constant
telnetenable.c:49: error: expected '=', ',', ';', 'asm' or '__attribute__' before '{' token
telnetenable.c:50:25: error: invalid suffix "px" on integer constant
telnetenable.c:52: error: expected identifier or '(' before '.' token
telnetenable.c:53:24: error: invalid suffix "px" on integer constant

[Virchanza]

Looks like the compiler's trying to compile something that actually isn't C

Post one of the files here and I'll be able to tell you.

Just for kicks, see if anything different happens if you run it like this:

gcc md5.c blowfish.c telnetenable.c -o myprogram

[SilvaRizla]

I've just unlocked my router, through telnet how do I forward ports or enable remote management?