checking out PaloAlto's IDS/IPS protocol DB and found this interesting.....

[slaveforanunnak1]

https://applipedia.paloaltonetworks.com/

Search for bitcoin and peer-to-peer to get a feel of how they treat that type of traffic. (note this is by default. All rules are changeable, if you manage the firewall, which i do )
I guess they think of bitcoin as threat level 4 while litecoin is a 1.
I'm surprised and pleased that they allow stratum protocol. (1)