Frequently Asked Questions

#ALL ERROR “Authenticate/Decrypt packet error: bad packet ID (may be a replay)...”

This OpenVPN error/warning happens on all devices when there are network issues (such as intermittent connection):

Authenticate/Decrypt packet error: bad packet ID (may be a replay): [ #211526 ] -- see the man page entry for --no-replay and --replay-window for more info or silence this warning with --mute-replay-warnings

So openvpn will only accept packets within certain "window" - if it is too old (because the packet was delayed too long) then the packet will be rejected and you see that error.

The window can be increased by adding this to the config:

> replay-window 64 30

(default is 64 15)

but usually the cause is a slow vpn/internet connection and/or packet loss.

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