Hi,
ok, set mtu on upstream gw to 1400, and everything
remains as before :-(
(didn't check at the upstream gw yet, but from inside the mesh i can
also access hotmail when 1-way-tunnel, and not access hotmail when
2-way-tunnel)
and tried another one with mtu 1200... still the same, seems not
related.
one more idea: Do you clamp the MSS on the batman gateway client ?
It is somehow related to the MTU problem.
You can try this iptables command:
iptables -I FORWARD -p tcp --tcp-flags SYN,RST SYN -j
TCPMSS --clamp-mss-to-pmtu
Regards,
Marek