Verifying the differences between TCP and UDP locally: Interpreting connection refusal and timeouts

When someone says "it won't connect," what do you ask back?A common report of an issue is a sentence like this.I can't ...
LWN.net

Allow offloading of UDP NEW connections via act_ct

Currently only bidirectional established connections can be offloaded via act_ct. Such approach allows to hardcode a lot of assumptions into act_ct, flow_table and flow_offload intermediate layer ...