According to yet another aspect of the subject matter described herein, operating the telecommunications network node in the learn mode includes performing validation testing for mobility management node identities extracted from received messages, updating validation pass and fail counts in the security database based on results of the validation testing, and updating the security statuses based on the validation pass and fail counts. 

According to yet another aspect of the subject matter described herein, operating the telecommunications network routing node in the learn mode includes dynamically learning time parameters usable for velocity checks between old and new foreign mobility management nodes. 

According to yet another aspect of the subject matter described herein, operating the telecommunications network routing node in the active mode includes receiving messages from foreign mobility management nodes, performing lookups in the security database using mobility management node identities extracted from the messages, and blocking or passing the messages based on the dynamically learned security status for the node identities stored in the security database. 

According to yet another aspect of the subject matter described herein, the telecommunications network routing node comprises a signal transfer point (STP). 

According to yet another aspect of the subject matter described herein, the telecommunications network routing node comprises a Diameter signaling router (DSR). 

According to yet another aspect of the subject matter described herein, the method for dynamically learning and using foreign mobility management network node identities includes providing, in the security database, a static profile table for overriding the dynamic learning of foreign mobility management node identities, wherein the routing node routes or blocks messages from foreign mobility management nodes based on the security status stored in the static profile table. 

According to yet another aspect of the subject matter described herein, operating the telecommunications network node in the test mode includes 

