The outage lasted from about 1:15 p.m. to 3:15 p.m. Tuesday. A firewall meant to guard against a cyberattack caused a two-hour outage of Massachusetts' 911 system on Tuesday afternoon, according ...

BOSTON — A firewall designed to prevent cyberattacks and hacking was to blame for the 911 outage that hit Massachusetts this week, state officials said Wednesday.

A firewall meant to guard against a cyberattack caused a two-hour outage of Massachusetts' 911 system on Tuesday afternoon, according to the state's Executive Office of Public Safety. The firewall ...