I use same version as you have in your web directory.
You can try yourself :)
hosts:
213.215.115.86 l2authd.lineage2.com
213.215.115.86 L2testauthd.lineage2.com
Game account:
login: tryhlap
password: hlapex
C5, no patch needed
On another servers hlapex works as ussualy but not here. I think its really some kind of homemade protection. Maybe they are genereting some fake packets to confuse hlapex. Tommorrow I will look on data under sniffer because I really dont understand where it stucks.