Application-level firewall convenient to install

The utility model discloses an application-level firewall convenient to install. The utility model relates to the field of network protection walls. The problem that a wire is pulled by a wire outletdevice of an existing protection wall is solved. The technical key point is that the device comprises a shell, wherein the fixed base shaft is arranged on the opposite side walls in the shell, the rotating base ring is arranged on the peripheral wall of the fixed base shaft in a relatively rotating mode, the connecting supporting rod is arranged on the outer ring wall of the rotating base ring, the reel is arranged at the end, away from the rotating base ring, of the connecting supporting rod, and the adjusting reed is wound on the fixed base shaft and fixedly connected with the inner ring wall of the reel. Wherein the wire outlet through groove is formed in the shell and used for allowing the wire outlet end of a wire to extend out, the locking assembly is arranged on the shell and used for limiting rotation of t