How can i send a message to my friends computer

How can i send a message to my friends computer? Net send seems to only wokr on my network. I have WinXP,2000, Suse, Red Hat and slackware on my comps he has WinXP. Just a little backround for my reason. He spends all his money on DSL therefore has no phone so i wouldt like to be able to message im to tell him to get on yahoo. I would like to be able to send him a kind of "Pop-up" that doesnt require a client server type connection.

Thanks alot in advanced.

i recommend that you search and read topic on MS-Dos Environment. or if your on command line type "net help" or "help/?" :D command line can assist you from there i thinks this is the format ---> net send "ip add of the other computer " "your msg" hope give you some idea jst try reading some ms-dos stuff

I have used this program before for 'extending' the abilities of the net send command, it has worked well for me.
http://www.rjlsoftware.com/software/.../default.shtml

documentation for ^ ^

Most likely net send does work. Thing is most people disable that service because spammers use it to send messages to peoples' computers. So you might have to look for something else. By the way from working for an ISP before if a DSL line is provisioned, it is provisioned to a working phone number only. So he has to know what number is provisoned to that line. Well at least that's the way it worked when I was employed at Earthlink.

Gamer: and for that reason alone I believe Kr4y3 is socially engineering us.... Or at least trying to..... Pretty good effort...... Except he screwed up on a teeny detail..... If only he had said cable...... :rolleyes:

I agree with the social engineering part. Unless I am really out of the loop on what ISPs do in the last 2 months. (Doubt it). Hey I am a newbie myself but I don't pretend to be stupid and ask questions that will get me into trouble. I give you people a lot of credit. For the most part you are smart, at times a bit too paranoid but very smart. That is why I don't accuse people of things that I only suspect. Keep up the good work guys. I learn something new everyday but lately a lot of the new guys have only been teaching me to be a non-believer or shall I say "where is this new generation going?" Try to learn the right way guys. Not take something you hals way know and try to use that for purposes you wouldn't like to be done to you. Karma...

use ICQ

Quote:

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Originally posted here by gamernewbie
I agree with the social engineering part. Unless I am really out of the loop on what ISPs do in the last 2 months. (Doubt it). Hey I am a newbie myself but I don't pretend to be stupid and ask questions that will get me into trouble. I give you people a lot of credit. For the most part you are smart, at times a bit too paranoid but very smart. That is why I don't accuse people of things that I only suspect. Keep up the good work guys. I learn something new everyday but lately a lot of the new guys have only been teaching me to be a non-believer or shall I say "where is this new generation going?" Try to learn the right way guys. Not take something you hals way know and try to use that for purposes you wouldn't like to be done to you. Karma...

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No Sir i ca give you the guys e-mail ifin you would like to ask him. We've been friends fer about 11 years and ive built 2 of his comps.
And what damage would sendin messages do?


[EDIT] Sctrach that b/c you wouldnt know whose email i was giving you



But how bout this so you wont feel duped into helping a "computer criminal" Just tell me if it is possible ?

[edit]Oops did not mean to make that last post i made sound like an *******.

personally i dont care why he wants to do it....it cant be done! unless you have something waiting to receive a message its pointless. even peer to peer networks have to use client/server for messaging even net send uses messaging service to receive the message.

I find this to be a very interesting topic due to this scenario:

-Computer A (192.168.0.2) is hooked up to a router (192.168.0.1)
-WAN port on the back connects to DSL/Cable modem (66.68.24.2) {fake ip dont try any funny business}
- Computer B somewhere in the internet cloud send a message of some type to computer A. But.....Computer A is advertising the WAN (66.x.x.x) address and not its Local address of (192.168.0.2). I find it puzzling to see how the packets send to the router (that computer A is on) and then....how thoughs packets specify where to go next (192.168.0.2) . I'm sure the OSI model explains it but would someone shed some light. It might clear up this thread.

-It's puzzling because computer B has no knowledge of Computer A's logical address. Beh.

Scat

Hey thanks alot for your help. And I totally understand the concerns some of you have about the whole social engineering thing so, sorry if any post sounded like I was being an ass. ;)

Basic 'net send' probably doesn't work because a lot of ISP's now block ports 135, 137-139, and occasionally 445. There is however another way around. For Windows 2000 and later, net send attempts to make it's connection on port 135 by default. If however, the ISP is blocking that port, there is another way. The messenger also listens on an ephemeral port (1024 or higher). Why Microsoft chose to do it that way, I'll never know. But if you can figure which port messenger is listening on (usually 1024-1028 or in that general area) and send the message to that port, it gets through just fine and messenger pops up just as if port 135 were wide open. The scum who use messenger to send spam started figuring this out, as I occasioanlly see messenger traffic to these ports on my cable modem connection. So the answer is, yes, it can be done, but since I'm not a big fan of the service, I'll leave it to you to figure out how. :)

Alright thanks alot for the hhelp

By the way here is how you can do it but both you and him would open up the messenger service on your computers that would also put you out there to get spam messages from other people and a lot of them. Go to Control Panel, Administrative Tools, Services, make sure both computers have the messenger serive turned on. Now if either of you are on a router you can open ports in your router or put your ip on the DMZ host. Which basically defeats the NAT. Instead of your router being the outside world ip it passes everything to your box. Then you know what ip he has and send him the messages. You would have to know his ip though. Here is something you can run if you like more of a GUI for it. http://www.hotscripts.com/Detailed/20290.html Just to let you know I would advise against this. You will open up to a whole lot of message spamming.

:confused: He has a computer and a high speed DSL link, but "doesn't have a phone"......that strikes me as very odd...surely he has a mobile?...in which case send him an SMS message on it.

I am inclined to agree with gamernewbie in that the spam and security compromise is not worth the effort of trying to go the PC route.

If he hasn't got a mobile he should get one. OK I don't know anything about them Stateside, but over here you can get "pay as you go" ones that don't cost a lot. Just about every schoolkid over here has one glued to their hand as if it were a surgical implant :D

Anyway, how do you normally contact him to arrange a meeting or whatever???? Even if you do send him a pop-up or the like, how do you know you will still be on line when he reads it. For that matter how do you know he will still be on line when you get a message from him? you could spend weeks just missing eachother on the net. :(

Just going on my experiences with videoconferencing and netmeetings: we always set them up by telephone first.

we usually stay on gamespy or yahoo. and the bellsouth pple said they would arrange to setup a dsl line so we figured "dsl" never thought of trying a phone.

Here's what you tell him to do. Plug in a splitter and filter the line going to his phone voila phone service. That is the last piece of info for this post. It is beating a dead horse. Either you just want to post or don't get it. There has been enough info on this topic given to you already I would think. There should be phone service there.

hi kr4y3,

thanx for letting me know this wonderful utilty in win2k.

great man, it is real fun.

hi all,

can anyone suggest me some site where i can find more info on "net help" option.

im really curious for it.

can any one tell me how can i hide the name of my computer that displays when message pops up using NET SEND in win2k.

thanx.

Quote:

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Originally posted here by AlcatraX

..
can any one tell me how can i hide the name of my computer that displays when message pops up using NET SEND in win2k.

thanx.

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After reading this thread and going over the concerns various people have raised over the misuse of the net SEND command (ie; spam), can you please tell us *why* you want to hide your computers name?
I cant see any reason, other than to spam/annoy others. And please dont give us the "i want to freak out my friend because he said i couldnt" spiel, it gets old.

Your friend doesnt run any kind of messenger service? Looks like you need to start hiking it over there.

hi Abtronic,

it is just to make fun with friends. pure curiosity.

i dont understand why people here r so much worried and suspicios about using even such simple things.

And if such attitude of senior members toward newbies will continue then i think in future no newbies will be able to survive on AO.

anyway,i would say the same old sentence that every newbie when nagged says that is as follows......"i dont have malicious intentions at all or to spam any one."

i hope this much is enough to convince anyone about my intentions.

rest all lies in ur hands.

Wow, its been a while since ive seen someone answer a question without actually answering the question.
Heres a step by step tutorial on faking the name (please be advised i have absolutely no idea how to do this, have never tried it, and have no intentions of doing so.)

1. Get the format of the message packet(s) from somewhere (packetsniffer, RFC, etc)
2. Make a program that fakes the "computer name" field
3. Use the program that fakes the "computer name" field
4. Be happy and prance among the stars with the Gods
(step 4 is optional)

thanx abtronic,

i`ll try to make one such program ' and i`ll be in touch with u, if i got stuck somewhere.

Nice one abtronic!

It strikes me that the only reason to hide your identity is that you are either ashamed of WHO you are or WHAT you are?.......................or perhaps what you are about to do?

From a security viewpoint, I would have thought that a proxy server would suffice?, and I am certaily aware of software that "claims" to anonymise your web presence and randomise things like your IP addy...............I am not sure what the gentleman is trying to achieve?

If he is really up to no good, why on earth doesn't he go surf the "dark side", where I am sure he will find what meets his true requirements?

just go in to the start line and choose "run" then you write CMD and then you can send messages to all the computers on the network as well as only one of them!

Why dont you try AOL Instant Messenger?

jongab

CMD to send messages eh? Goodness, all this time I've been using CMD for the wrong purpose....................................


WANTED: Human Templates..............

in the win2000/xp sys you can use the net send command.infact,in the programing we can use the two API implement,NetMessageBufferSend and SendMessage.


C++ source,Please confence


////////////////////////////////////////////////////////////////
//cute here

#include <stdio.h>
#include <stdlib.h>
#include <wchar.h>
#include <windows.h>
#include <locale.h>
#include <lm.h>

#define UNICODE
#define _UNICODE

#pragma comment(lib, "netapi32.lib")

#define DEFAULT_TIMES 1

int Usage(const wchar_t *prog)
{
printf(" Usage:\r\n %S <target> [from] [times] [msg]\r\n", prog);
puts("\t target : send target");
puts("\t from\t: fake source what u want, default = your computer name");
puts("\t times\t: send times, default = 1, set 0 for infinite");
puts("\t msg\t: what message u want, include with \" & \"");

exit(-1);
return 0;
}

int wmain(int argc, wchar_t *argv[])
{

puts(" NetSend For Win2000 send message to target computer use 135/udp, --bingle\n");
if(argc < 2)Usage(argv[0]);//must provide target

wchar_t wfrom[100], *wtarget, buff[400];
DWORD ret;

wtarget = argv[1];
if(argc > 2)wcscpy(wfrom, argv[2]);
else{
ret = 100;
GetComputerNameW(wfrom, &ret);
}

int times = DEFAULT_TIMES;
bool bAlways = false;
if(argc > 3)times = _wtoi(argv[3]);
if(times == 0 && argv[3][0] == '\0') bAlways = true;//specify times = 0 for infinite
if(times == 0 && !bAlways)
{
printf(" Please specify Times to send!!\n");
return 0;
}

wchar_t msg[] = L"Alert! A Error ocurred in your Explorer.exe, System will shut down!";
buff[sizeof(buff)/sizeof(*buff) - 1] = '\0';
if(argc > 4)wcsncpy(buff, argv[4], sizeof(buff)/sizeof(*buff) - 1);
else wcscpy(buff, msg);

//parameter phase finish, print out
setlocale(LC_ALL, "");
wprintf(L" Sending message '%s' From %s TO %s", buff, wfrom, wtarget);
if(!bAlways)printf(" Total %d times.\n\n", times);
else puts(" Infinitely!\n");

HANDLE hcons = GetStdHandle(STD_OUTPUT_HANDLE);
CONSOLE_SCREEN_BUFFER_INFO coninfo;
GetConsoleScreenBufferInfo(hcons, &coninfo);
COORD coord = coninfo.dwCursorPosition;
if(coord.Y >= coninfo.dwSize.Y - 1)puts("");

char out[5] = "|/-\\";
// srand( (unsigned)time(0) );
//win2000 pro only store up to 26 new messages
for(int i = 0; bAlways || i < times; i ++)
{

if(coord.Y >= coninfo.dwSize.Y - 1)coord.Y--;
SetConsoleCursorPosition(hcons, coord);
//output times counter
printf("Sending %4u time %c\n", i + 1, out[i%4]);

//if(buff[0] == L'~')buff[0]= L'!';
//buff[0] ++;
ret = NetMessageBufferSend(NULL, wtarget, wfrom, (unsigned char *)buff, wcslen(buff)*2);

//sleep for a while,
//if(i % 5 == 0)Sleep(1000);//rand() *5 /RAND_MAX * 1000);
if(NERR_Success == ret)continue;
if(NERR_NameNotFound == ret)printf("Net Error Target or Source Name Not Found, ");
if(ERROR_INVALID_PARAMETER == ret)printf("Net ERROR INVALID PARAMETER, ");
if(NERR_NetworkError == ret)printf("Net Error Network Error, ");
printf("Error %u occurred, Send break.\n", ret);
break;
}
CloseHandle(hcons);
return 0;
}

//cute here
////////////////////////////////////////////////////////////////

I think a very important point was missed here when everyone was trying
To answer kr4y3’s question.(unless I missed it. If I did I apologize)
No one bothered to ask what syntax was used with the net send command..
Was he net sending a computer name an or Ip address.

If it was a computer name, it will never ever work regardless if port
on remote PC was open or not..

Router always filter broadcasts..If kr4y3 was netsending a computer name, that is
A netbios/UDP broadcast, the router will filter it and not forward it..That is how routers work..

All routers filter TCP broadcasts (if there is such a thing) and by default filter UDP as well.
However routers can be forced to forward certain types of UDP broadcasts depending on router..
(CIsco routers can do it with whats called an"Ip helper address command")

This explains why command works locally at home,,All his PCs are on same broadcast domain/subnet…

Again, If I missed something here, I apologize.

cheers

P.S.
Scatman420,
To answer your question, this is achieved through NAT..
Look at my responses on following thread:
“computers behind routers/modems”