TCP & UDP Port Availability Monitoring Software

Monitor Non-HTTP Infrastructure with Raw Socket Probes

Not every critical piece of backend infrastructure exposes an HTTP or HTTPS endpoint. Database clusters, Redis caching layers, SSH bastion gateways, message queues (RabbitMQ, Kafka), and email dispatchers run on dedicated raw TCP or UDP network ports.

If your database connection pool maxes out or an AWS Security Group rule misconfiguration closes port 5432, web applications fail immediately with fatal connection errors. Traditional website monitors cannot inspect these ports directly because they only know how to perform HTTP GET requests.

Pingzo Port Monitoring provides dedicated, high-frequency TCP and UDP socket reachability testing from global probe nodes. Monitor any custom port number, verify handshake latency, and get alerted via WhatsApp or Slack the instant a network service stops accepting connections.

1. Core Services Protected by Pingzo Port Probes

[ Pingzo Global Probe Network ]
               │
               ├──────( TCP Handshake Port 5432 )─────> [ PostgreSQL Cluster ]
               ├──────( TCP Handshake Port 6379 )─────> [ Redis In-Memory Cache ]
               ├──────( TCP Handshake Port 22 )───────> [ Production SSH Bastion ]
               └──────( TCP Handshake Port 587 )──────> [ Postfix / SMTP Mail Relay ]

Popular Ports Monitored by Operations Teams:

• Databases: PostgreSQL (5432), MySQL / MariaDB (3306), MongoDB (27017), Microsoft SQL Server (1433).
• Caching & Queues: Redis (6379), Memcached (11211), RabbitMQ (5672).
• Infrastructure & Remote Access: SSH bastions (22), RDP gateways (3389), VPN tunnels.
• Email & Telephony: SMTP (25, 465, 587), IMAP (993), SIP / VoIP gateways (5060).
• Custom Daemons: Custom TCP/UDP microservice ports powering proprietary game servers, IoT ingest pipelines, or financial trading feeds.

2. Advanced Diagnostic Capabilities

• Full TCP Handshake Verification: Probes complete a full SYN -> SYN-ACK -> ACK three-way handshake to verify the operating system kernel is actively accepting connections, rather than dropping packets.
• Socket Connection Latency (RTT): Track millisecond connection handshake times over time to identify network congestion and noisy neighbor problems on cloud VPS instances before full outages occur.
• Firewall & Security Group Auditing: Detect accidental cloud firewall policy changes that inadvertently expose or block critical backend ports.
• Static Probe Whitelisting: Easily configure your VPC security groups and firewall appliances by whitelisting Pingzo's official static IPv4 and IPv6 probe addresses.

3. Configure Port Checks in 3 Simple Steps

1. Enter Hostname and Port: Provide the IP address or fully qualified domain name (FQDN) along with the target port number (e.g., db.internal.example.com:5432).
2. Set Check Interval and Timeout: Choose a frequency from 30 seconds to 10 minutes and configure socket timeout thresholds (default: 5,000ms).
3. Connect Your Notification Channels: Route alerts directly to your on-call escalation ladder or SRE team via WhatsApp, Telegram, or Discord.