Verify the ports that matter are open.
Or that they stay closed.
Establish real TCP/UDP connections to any host or IP. Confirm SMTP, VPN, Redis, and core services are listening, and surface routing issues before production is impacted.
TCP cache.internal:6379
Real connections. Not just pings.
A port scanner tells you a port is open. NoDisrupt establishes a full TCP connection, measures how long it takes, and alerts you the moment that changes, whether a service stops listening or a firewall rule silently blocks traffic.
TCP/UDP reachability
Go beyond ICMP ping. NoDisrupt establishes real TCP connections and validates UDP reachability against any host or IP, so you know SMTP is accepting mail, VPN is listening, and Redis is serving connections.
- Confirm essential services are listening
- Detect closed or blocked ports before impact
- Check from your chosen regions
Connection-time latency
Measure the exact time it takes to establish each TCP connection. A port can be technically open and still be dangerously slow, catch connection-time degradation before it cascades into timeouts and dropped requests.
- Track TCP connect latency
- Alert when connection time degrades
- Trend performance over time
Connect Time, cache.internal:6379
Multi-Port Scan, db.internal
Routing & multi-port
Network paths change. Firewall rules drift. Watch multiple ports per host in a single monitor and get alerted when a port that should be open disappears, or one that should be closed quietly opens up.
- Surface routing issues between monitor and host
- Watch multiple ports per host
- Catch firewall/ACL changes
Know before the connection refuses.
Start monitoring your ports in under a minute.
Create Your First Monitor