[saidnooneever]

this looks like not Valve issue. the problems noted seem to indicate only countries which very aggressivly scan and filter connections. P2p is very sensitive to this.

SDR is a relay network, and encrypted, so like onionrouting etc.

its well known malicious actors can abuse it by publishing a p2p game and running coms over SDR via that game...

you can imagine that people want to inspect this traffic in these regions..