> CoDeSys is a development environment for programming controller applications according to the international industrial standard IEC 61131-3. The term CoDeSys is an acronym and stands for Controller Development System. http://de.wikipedia.org/wiki/CoDeSys CoDeSys is no software firewall. It just tries to make an entry on the Windows firewall exception list which doesn't exist. Did you mean, the software which tries to make this entry wont work?