Firewalls control traffic flows between internal and external communication partners. Mostly traffic from inside to 
outside is allowed, but traffic coming from outside must be explicitly configured. The rules which packets may traverse 
the firewall and which not are normally configured manually by firewall administrators. To speed up such kind of access 
list changes, it would be desirable to dynamically signal access requests and automatically change those access lists. 
Though some protocols are inspectable by firewalls already like FTP, SIP and H.323, a general protocol, which could be 
used for signaling dynamically required access rules, is not available until now. 
This paper proposes a standard protocol, which would allow such signaling in a secure manner. Firewalls which have 
installed a corresponding inspection module could be configured automatically, which would ease the configuration of 
such systems a lot.