Checking apache access.log we noticed that the client IP of one of the moodles was not its real IP. Changing network configurations we got it right.
cheers,
susana
Moodle networking (MNet)
MNet - Operation timed out
Гэтае абмеркаваньне было заблакавана, таму вы болей ня можаце адказваць на яго.