Vicksburg provides free wireless internet access at several locations. They are:
The Tourist Information Center
Clay Street, across from the entrance to the Vicksburg National Military Park
The Vicksburg Convention Center
1600 Mulberry Street
in the 1200 through the 1400 block of Washington Street.
Parts of Downtown Vicksburg are a part of the WiFi Zone.
Check the city of Vicksburg site at www.vicksburg.org for more details.