MTA:SA fix

Unknown protocol, No address specified or Bad port number when joining by address

MTA shows a message instead of joining when you type a server address. Type the whole address and port, starting with mtasa:// (for CIT: mtasa://s2.cit.gg:22003).

Codes on this page: CC21, CC70, CC71, CC74, CC75

Steps

1. Type the whole address and port

   Only if MTA says No address specified!

   The address box was empty, or had only mtasa:// in it. Type the server's address and port into it, or pick a server from the history list. Then press Connect.

   Source: MTA source code, CIT Live KB · gameplay.md

2. Start the address with mtasa://

   Only if MTA says Unknown protocol.

   The address starts with another protocol, like http://. Start it with mtasa:// instead, or type only the address and port: MTA then adds mtasa:// by itself. For CIT: mtasa://s2.cit.gg:22003.

   Source: MTA source code, CIT Live KB · gameplay.md

3. Check the address for typing mistakes

   Only if MTA says Connecting failed. Invalid host provided!

   MTA could not use the address you typed. Check it, type the address and the port again, then try again.

   Source: MTA source code, MTA wiki, CIT Live KB · gameplay.md

4. Select a server first

   Only if MTA says You have to select a server to connect to.

   In the server list, click one server so it is selected. Then press Connect.

   Source: MTA wiki, CIT Live KB · gameplay.md

5. Network not ready: wait a moment

   Only if MTA says The network module is not ready, or Network is not ready, please wait a moment.

   MTA is not ready yet. Wait a moment, then try again.

   Source: MTA source code, MTA source code, CIT Live KB · commands-account-and-general.md

6. F8 console: type the address, then the port

   Only if the connect command says Bad port number, or shows its syntax.

   Open the console with F8. Type connect, then the address, then the port, with a space between them. For CIT, type connect s2.cit.gg 22003.

   Source: MTA wiki, MTA source code, CIT Live KB · commands-account-and-general.md

See also: Server browser is empty or stuck on Loading, CC23 / CD08: connection timed out, Disconnected by an unknown protocol error

Still not fixed? Copy the whole message, not only the code, and check your log in the Fix tool. It is read on your own computer.

Other problems like this

• CD14: Server is full
• MANDATORY UPDATE or OPTIONAL UPDATE when you join a server
• CD20: server resource download failed
• CC23 / CD08: connection timed out
• Disconnected by an unknown protocol error
• An in game browser page cannot load

All fix guides · Every MTA:SA error code · Crash codes and offsets