During the ‘90s I pinged yahoo servers 24x7 to keep the inactivity timeout from dropping my connection. Then one day the phone rang - and I discovered they had

During the ‘90s I pinged yahoo servers 24x7 to keep the inactivity timeout from dropping my connection. Then one day the phone rang - and I discovered they had blocked ICMP so my connection dropped. There were so many telemarketers pounding my phone that anytime I got disconnected the phone would ring within thirty seconds and that would be my cue to go investigate.