Since it was just ping, mss-clamping didn't play a role.
The NAT64 GWs I used aren't under my control.
But I was surprised that out going packets are not rejected (no message packet to big) , but the incoming packets were fragmented. While the normal ping (-6) does silently reassemble the packets, ping (-4) via clat doesn't. The problem only occurred on the tayga gateways.
A third NAT64 GW (provived by Deutsche Telekom, I don't know the implementation behind) did not fragment.
Thomas Schäfer
npub1l8…xmz8s
2026-08-21 20:42:48 UTC
in reply to nevent1q…wq9n
Author Public Key
npub1l8tht6mr3szujpxuyvemhcegk5jkrchzmfpw8jl2wv3sq72kpgpqnxmz8sPublished at
2026-08-21 20:42:48 UTCEvent JSON
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