The posting was actually forged by Piet Beertema of CWI (in Amsterdam) as an April Fool's prank[1]—"because the notion that Usenet might ever penetrate the Iron Curtain seemed so totally absurd at the time".
Vadim Antonov, the senior programmer at Demos and the major poster from there until mid-1991, was quite aware of all this, and referred to it frequently in his own postings.
Antonov later arranged to have the domain's gateway site named kremvax.demos.su, turning fiction into truth and, according to one account, "demonstrating that the hackish sense of humor transcends cultural barriers".
The X.25 connections had existed since 1980, primarily via VNIIPAS and Academset to Soviet bloc countries and Austrian hosts at IIASA and IAEA.
[5][6] In 1983, the San Francisco Moscow Teleport (SFMT) venture was created to maintain USSR-American digital connections via VNIIPAS with its own Usenet analogues later known as Sovamnet ("Soviet-American net").