Adding IP to modpack

[iatemyhomework]

I have seen this done a couple of times, and I cannot for the life of me figure it out.  When I download a custom modpack, sometimes there is an IP already listed to connect to a server running the modpack.  I would very much like to learn how to do this.  Thank you

[plowmanplow]

That happens if you include a "servers.dat" file in the top level of your folder structure in your modpack archive. This file is created automatically when you create a server entry in the client. Simply start with a "clean" file (remove it) and make your server entry after starting the client. Include this file in your modpack.