Hi!
I checked how SER would behave with large Max-Forwards values. Paragraph 20.22 of RFC 3261 notes Max-Forwards to be anywhere between 0 and 255 but SER lacks a check for the upper boundry in the maxfwd module.
I'm not sure how the correct way to remove the broken header field and introducing a correct one would be so I leave this for somebody who knows :)
Hendrik