After upgrading from the previous stable version to
IPFire 2.27 (x86_64) - core160 Development Build: master/8c855a58 we’re observing distortions with OpenVPN n2n connections:
a) effective bandwidth/throughput ist sometimes/overnight lowered from ~160 to ~10 MBit/s
b) OpenVPN log on the IPFire that mainly receives data (not the sending IPFire) shows “AEAD Decrypt error: bad packet ID (may be a replay)” with high frequency
c) CPU load on the mainly receiving side is increased, but not saturated
reboot of both IPFire systems helps to increase throughput again, but the errors persist.