System Setup Issues
uDifficult to establish routing through several firewalls
ØAll required valid declaration of the source IP address for successful transmission
uNeeded to:
ØDetermine appropriate firewalls
ØIdentify the right resource with knowledge about opening the firewall
ØGet permission to open the firewall
ØGet permission to bypass proxy server on the source side
ØGet permission for new digital certificates
ØMake hardware changes
uLessons learned:
ØBudget several weeks of time to establish connectivity between the source and target computers in order to handle all communications securely.
ØChallenge to synchronize source and target computers:
§In large computing facilities, this function is usually centrally managed.
§Two different time managers for the source and target systems.
§Periodically one of the systems ends up being off by several minutes which then invalidates all of the web service calls.