Just tested on my machine - 127.0.0.1 works fine, so it seems like a bug or misconfiguration. Could you please send me agent's configuration from the host where you define DCI with ServiceCheck.Custom(127.0.0.1,xx) and output of netstat -an from this host?
Best regards,
Victor
Best regards,
Victor
Она у меня без дела в стойке стоит