Phillip Hallam-Baker wrote:
You are incorrect.
Firewalls can be used for many purposes. Authenticated traversal is well
established in the firewall model.
Given the diversity of firewalls and their operations, it's
practically impossible.
There is a copious amount of prior art.
Remember what happened to path MTU discovery.
Just as path MTU discovery for IPv6 won't work, you can't expect
firewalls in the real world behave friendly to your own firewall
traversing protocols.
Masataka Ohta
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