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Unable to DCC                                                             This page last updated: 01/07/11 06:25:16 PM
Install Identd Unable to DCC Lynksys Questions? psyBNC Questions?

     UNABLE TO DCC
      Most Common Reasons

For the person who wants simple explanations and illustrations on how to solve DCC problems.

If you are connecting to the internet using a wireless connection, you have to be on the first internal address in the LAN, in order to run identd.  If your computer is not running identd, you will not be able to DCC.  You can begin to troubleshoot this in the next section.


THE INTERNAL ADDRESS: 
1)  Are you are connecting to the internet using a LAN (home wireless network)?

If you are coming in a LAN, and we will troubleshoot your problem.  If you are not coming in on a LAN, you can skip this section.

You need to know the number of the main internal address that your LAN assigns.  This is determined by the Router you use.  You connect to your Router with an Internet Browser using an IP Address assigned your Router maker.  That number is the *main*  internal address for  your LAN.  You will need to check your Router maker to determine what number they use.  I believe that Linksys uses 192.168.1.100, and Dlink uses 192.168.0.199.

Your Router will assigns different internal  IP Addresses to everything that connects to it .. each computer, printer, game, etc.  You can only DCC from the computer that has been assigned the *main* internal IP Address on your LAN.   You will not be able to DCC from other computers on the LAN, because they will not be unable to run identd.  You must be running identd, to  DCC. 

You need to find out what the *main* number your particular Router uses. 
Here is how to find out if your computer has been assigned the *main* number by your  Router:

     1) Start ->  Run  ->  Type in:  CMD  and then enter

     2)  You will be at a DOS prompt. Type in:   ipconfig/all  and then enter

           Look down the list to find "IP Address"   :   The number listed there, is the internal
            number that the Router has assigned to your computer.  If your computer does not
           have the main number, all you need to do, is reset your Router, as follows:

                         Unplug your modem and wait 10 secs.
                         Unplug your router and wait 10 secs
                         Plug in your modem and wait 10 secs
                         Plug in your router and wait 10 secs.
            When you turn your computer back on, you can check to make sure your computer has
            grabbed the main internal address.  If you now have the *main* number and still cannot
             DCC, continue to troubleshoot with #2 below.


YOUR INTERNET ADDRESS
2)  FIND THE IP ADDRESS YOUR INTERNET PROVIDER HAS ASSIGNED TO YOU

Click HERE to go to a website where you will find the IP#, that your Internet Provider assigned to you.

Look for the numerical address (example)    IP-Address:  24.164.150.219   
Write this number down.


3)  IS "LOCAL INFO" CORRECTLY CONFIGURED IN mIRC ?

Open up mIRC and then DISCONNECT from the server (changes should be made while disconnected).  Open up mIRC Options (Alt+O) .. Click on the Connect tab,  then the Local Info tab. 


Local Host:  Leave empty (mIRC will fill this in for you)
IP Address:  Type in the Internet IP# from your notes.
On Connect Always Get ..  Untick  both Local Host and IP Address.  Both must be Unchecked.
Lookup Method:    Check  Server

Click OK,  and close. 
Fire up mIRC and give DCC a shot.  If it is still not working, perform the next test.


4)  IS mIRC LISTENING FOR DCC's ?

mIRC has to *listen* for DCC’s on port 59.
Alt+O, click on the DCC tab, click on the SERVER tab.  You do not have to enable a DCC Server, but make sure that where it says "Listen on Port" .. that 59 has been entered.  I don't know why, but I found mine had changed.

If it doesn't say 59 .. change it to 59 and click OK before you close. Try to DCC .. if it is still not working, move on to the next possibility.


5)  IS WINDOWS FIREWALL BLOCKING YOU ?

DCC or Identd may be blocked by Windows Firewall

Let's check to see.  Go to START, then Control Panel, and open the Windows Firewall icon. 

If it is ON, turn it OFF .. Click OK

Now
try to DCC.  If it works, you know that Windows Firewall was blocking you. 

If you do not have a Personal Firewall, then you will want to go back and turn Windows Firewall back on.  You are going to have to configure Windows Firewall so that it will allow DCC to pass through it.  Here is an excellent source which explains how to do this.
http://www.mishscript.de/ircguide/appb1.html


6)  IS YOUR SOFTWARE FIREWALL BLOCKING DCC ? 

Your Software Firewall could be blocking you

Probably the most popular Software Firewalls are Zone Alarm, Norton, McAfee and Kaspersky .. althought there are others.

If you are running a Software Firewall, test to see if it is blocking you.  It’s never a good idea to turn off your Firewall, but it’s the only way I know how to test for this problem.  You may want to disable or turn off your Firewall and then try to DCC.  If it works, you know that it was your Software Firewall that was blocking it. 

Turn your Firewall back on. You will need to read the FAQ or call Tech Support of the Mfg. of your Firewall. 
Tell them you need to give mIRC permission to set Identd (port 113), and DCC (which means *act* as a server). 


7)  ARE YOU USING A HARDWARE FIREWALL ? 

The Hardware Firewall on your Router may be blocking DCC

The solution is to set up Port Forwarding on your Router.  If you are using a Linksys Wireless Router, you are in luck.  I have written some instructions on how to enable Port Forwarding.  Click HERE      
 If you are using a different brand Router you will need to read the instructions that came with your Router, read the FAQ at their Website, or call Tech Support.  You need to set up Port Forwarding using the following perimeters:

The port ranges need to be in a very high numbered range. Do not pick port numbers below 1024 (i.e.  1 to 1023), as this could cause major problems with other protocols (FTP, HTTP, SSH, SMB/CIFS, NFS, and hundreds of others). Stick to port numbers above 40000, and do not exceed 65534.  For example you could use 47000 to 47010, or 50000 to 50010.

How many Ports?   
Ten Ports are sufficient unless you will be sending and receiving more than 10 DCC’s at a time. 

 


8)  DOES YOUR VIRUS PROTECTION THINK THAT DCC IS A VIRUS/WORM ? 

This is not likely, but you might want to check to be sure.

Are you getting any messages that it finds a Worm or something when you try to DCC?  It’s never a good idea to disable or turn off your Virus Protection and I won't advise it here.   Sometimes an Anti Virus program will register a "false positive".   

If this is your problem, you will need to contact the maker of your Virus Protection to find out how to allow DCC.


9)  STILL UNABLE TO DCC? 

Is mIRC confused?
Type on .. 
/localinfo –u  in any mIRC window, and enter. 
This will make sure mIRC is not confused about what your address is.


 If you have worked your way through this list and are still not able to DCC, I  recommend you join #mirc and talk to some of the friendly people in there.  They may be able to think of some things I missed.

I wish you great success!  

 Sincerely,

CometBaby


 
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