You don't need a plugin for that, just edit the amxx.cfg
Code:
// Mode of logging to a server
// 0 - disable logging, players won't be checked (and access won't be set)
// 1 - normal mode which obey flags set in accounts
// 2 - kick all players not on list
//
// Default value: 1
amx_mode 2
Then look in the amxmodx/data/lang folder and edit the admin.txt file.
Code:
NO_ENTRY = You have no entry to the server...
Code:
NO_ENTRY = Our new IP is 12.345.67....