I was just reading up on Kerberos and realized that the lifetime of a master ticket called the TGT(ticket granting ticket) is 25 hours. Is there any particular reason behind this choice of lifetime?
The Kerberos (v5) RFC does not specify a lifetime but recommends nothing more than 25 hours life for each ticket (section 8.2) and a renewal time of max. one week. There is probably no good answer here as to why Stanford chose to break that recommendation.