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Network Monitoring From Around the World — and From Inside Your Network

Verify that every host, server and network path is reachable, fast and routing correctly. Dotcom-Monitor runs Ping, Traceroute and TCP Port checks from 30+ global locations and from Private Agents deployed inside your data centers and branch offices — so you catch outages, latency drift and routing failures before your users do.
Dotcom-Monitor network monitoring dashboard tracking Ping, Traceroute, and TCP Port checks across 30+ global locations and Private Agents inside the network
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Organizations Worldwide

99.99%

Platform Uptime SLA

30+

Global Monitoring Locations

Since 1998

Website Monitoring Leader

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What Is Network Monitoring?

Quick answer

Network monitoring is the continuous, automated testing of hosts, servers, devices and the paths between them to confirm they are reachable, fast and routing correctly. It combines Ping (ICMP) for reachability and latency, Traceroute for hop-by-hop path analysis, and TCP Port checks for service availability — run from global locations and from inside the network — so outages, packet loss and latency drift are caught before users report them.

In practice, network monitoring answers three questions on a schedule: Is the host up? Is the path healthy? And is the service actually listening? Modern network performance monitoring goes beyond a simple up/down ping to track latency, jitter, packet loss and connectivity trends over time, alerting on brownouts as well as hard outages.

Dotcom-Monitor is a cloud-based network monitoring software and service that answers all three questions with three complementary checks — ICMP Ping for reachability and latency, Traceroute for path analysis, and TCP Port/Telnet checks for service availability. Every check runs from 30+ global locations to see the world’s view of your network, and from Private Agents inside your own environment to see the internal view — including inside-to-outside connectivity and links between branch offices.

Why Is Network Monitoring Important?

Networks are on the critical path for everything — websites, applications, APIs, remote work and branch connectivity — and they fail silently. A link can stay “up” in the dashboard while dropping packets, a route can shift to a slower path, or a service port can close while the host still answers a ping. Without continuous network monitoring, these problems are only discovered when users complain. Synthetic checks surface tunnel drops, latency regressions, packet loss and unreachable services in seconds, so teams cut mean time to detection and protect SLAs.

Types of Network Monitoring Dotcom-Monitor Covers

Availability & Reachability

ICMP Ping monitoring and TCP port checks confirm hosts and services are up and answering across every location.

Network Performance

Track round-trip latency, jitter and packet loss over time and alert on statistical drift — network performance monitoring, not just up/down.

Path & Routing

Visual Traceroute exposes every hop so you see exactly where congestion, loss or a route change enters the path.

Internal & Connectivity

Private Agents monitor internal-only hosts and validate connectivity between branch offices and different networks.

Synthetic & External

Distributed, agentless checks from 30+ locations show what real users and upstream providers experience — a modern alternative to appliance-only NPM.

Protocol & Service

Extend the same platform to DNS, VPN tunnels and uptime for full-stack coverage.

Three checks, one platform

Ping, Traceroute and Port Monitoring — Working Together

Each check answers a different question about your network. Run them side by side and you get a complete picture: reachability, routing, and service availability, from wherever you need to test.

Ping (ICMP) Monitoring

Confirm a host is alive and measure round-trip latency and packet loss on every check. The fastest way to know a server, router or gateway has dropped.

Traceroute Monitoring

Map every hop between the test point and the target with a Visual Traceroute — 30-hop, color-coded, map-based — to pinpoint exactly where latency or loss enters the path.

TCP Port / Telnet Monitoring

Verify a specific service is accepting connections — port 443, 25, 3389, a database port, or any TCP service. Reachable isn’t enough; the port has to answer.

Check
Answers
Key signals
Great for
Ping (ICMP)
Is the host reachable?
Up/down, round-trip time, packet loss %
Servers, routers, gateways, firewalls, edge devices
Traceroute
Where is the path breaking?
Hop-by-hop latency, failing node, route changes
ISP & peering issues, multi-cloud paths, VPN routes
TCP Port / Telnet
Is the service listening?
Port open/closed, connect time, banner response
Web, mail, RDP, SSH, SQL, custom application ports
Two vantage points

Monitor From the Outside In — and the Inside Out

Most tools can only see your network from the public internet. Dotcom-Monitor sees it from both sides, so nothing hides between the perimeter and the endpoint.

Global Monitoring Network

Run the same Ping, Traceroute or Port check from 30+ locations across six continents. See how reachability, latency and routing to your public-facing infrastructure differ by region — and detect location-specific outages the moment they appear.

Private Agents

Install a lightweight Windows or Linux agent inside a data center, office or branch. It runs the same network checks from behind your firewall and reports back over a single outbound HTTPS connection — no inbound ports opened, no VPN back into your network.

Need to watch VPN tunnels and the internal apps behind them too? See VPN Monitoring — the same Private Agent architecture, focused on site-to-site tunnels and client-VPN applications.

Real network scenarios

Built for the Network Problems That Stay Hidden

Branch & Office Connectivity

Deploy an agent at each branch and continuously Ping and Port-check the link to HQ or other sites. Flag the branch that silently drops connectivity at 3 AM before the store manager calls in.

Inside-to-Outside Egress

Measure connectivity from inside your perimeter out to SaaS, cloud and upstream providers — surfacing ISP degradation and egress firewall issues an external-only check never sees.

Internal Servers & Devices

Watch internal-only hosts, hypervisors, storage arrays, printers and IoT/edge devices that have no public address — Ping and Port checks from an agent on the same network.

Multi-Cloud & Hybrid Paths

Traceroute between on-prem, AWS, Azure and GCP to detect misconfigured routes, asymmetric paths and latency regressions across every leg of a hybrid network.

Firewall & VPN Path Issues

Confirm traffic actually traverses the intended firewall rule or VPN route with traceroute, and catch re-key drops or failovers that silently blackhole a path.

Service & Port Availability

Track that RDP (3389), SSH (22), SMTP (25), SQL and custom application ports stay open across every location — with connect-time trends, not just up/down.

Set up in minutes

How Network Monitoring Works

Point a check at any public host for global monitoring, or drop a Private Agent inside your network for the internal view. Either way, you’re minutes from continuous coverage — with no infrastructure to maintain.

1

Choose Your Vantage Point

Select one or more of the 30+ global locations for a public target, install a Private Agent for an internal one — or use both to compare inside and outside.

2

Configure the Checks

Add Ping, Traceroute and TCP Port tasks against each host. Set the frequency — as tight as one minute — and define latency and packet-loss thresholds.

3

Alert & Report

Route failures to Slack, Teams, PagerDuty, email or SMS with escalation. Build NOC dashboards and schedule SLA reports for network leadership.

Single host viewed through three network monitoring lenses — Ping reachability, Traceroute path, and TCP Port availability — showing how each check reveals a different network layer

One Host, Three Perspectives on Its Health

A single device gets a reachability check, a path check and a service check — and each can run from many locations at once. When something breaks, a traceroute fires automatically so you have hop-by-hop diagnostics waiting the moment you open the alert.

All three checks are part of the same ServerView infrastructure platform, so they share the same dashboards, alert groups and reports as the rest of your monitoring.

One platform, every layer

Network Monitoring That Plugs Into Everything Else You Watch

Ping, Traceroute and Port checks live in the same account as your website, API, DNS and infrastructure monitoring — one UI, one set of alerts, one reporting pipeline.

Beyond a simple up/down check

The Network Failures Inside-and-Outside Monitoring Catches

A single external ping will never tell you about these. Ping, Traceroute and Port checks — run from both the internet and inside your network — will.

Failure
What users experience
How Dotcom-Monitor detects it
Branch link silently drops
A whole office loses access to HQ apps
Private Agent Ping/Port checks between sites fail within 60s
Upstream ISP degradation
Everything feels slow from one region
Global-location latency spikes; traceroute shows the bad hop
Route change / asymmetric path
Intermittent slowness, hard to reproduce
Traceroute path diff flags a new or flapping hop
Service crashed, host still up
App down while the server still pings fine
TCP Port check reports the port closed even though ICMP is OK
Egress firewall blocks outbound
Internal apps can’t reach a cloud dependency
Inside-to-outside agent check fails from behind the perimeter
Packet loss without an outage
Calls drop, uploads stall — but “it’s up”
Ping loss % crosses threshold; alert fires on the brownout

What Network Teams Say

"I'm a network analyst and use Dotcom tools inside the ISP I work at. It's a really good and reliable tool for monitoring things along the network and testing network components — I use it for server latency diagnostics and DNS resolve time."
Leonardo J.
IT & Network Infrastructure Analyst · Internet
Verified Capterra review
"The push/pull API capabilities give us the network performance data we need. Dotcom-Monitor lets us monitor multiple services within one interface and platform. It's allowed us to operate more efficiently."
Gregory S.
Manager · Broadcast Media
Verified Capterra review
"The real-time alerts and detailed performance analytics have been a game-changer for our uptime. The global monitoring feature ensures our services are optimized everywhere, and support is exceptional."
Tomer C.
Managing Director · Facilities Services
Verified Capterra review

4.5

Capterra

82 reviews

4.6

Ease of Use

Capterra Score reviews

4.6

Customer Service
Capterra Score reviews

All reviews sourced from Capterra verified reviews. Ratings as of July 2026.

Get answers

Network Monitoring FAQ

Network monitoring is the continuous, synthetic verification that hosts, servers, devices and network paths are reachable, responsive and routing correctly. Dotcom-Monitor does this with ICMP Ping checks for reachability and latency, Traceroute for hop-by-hop path analysis and packet loss, and TCP Port/Telnet checks for service availability. Checks run from 30+ global locations and from inside your own network using Private Agents.

Yes. Deploy a Private Agent — a lightweight Windows or Linux service — inside your network, data center or a branch office. It runs the same Ping, Traceroute and Port checks from the inside and streams results back over a single outbound HTTPS connection. No inbound firewall rules are required, so you can monitor internal-only hosts and validate inside-to-outside connectivity.

Install a Private Agent at each location and run Ping, Traceroute and TCP Port checks between them. You continuously verify the branch-to-HQ or site-to-site path is up, measure its latency and packet loss, and confirm the route actually traverses the intended link. If a branch silently loses connectivity, you’re alerted within a minute — before the site calls the help desk.

Ping (ICMP) confirms a host is reachable and measures round-trip latency and packet loss. Traceroute maps every hop between the monitoring point and the target, exposing where along the path latency or loss is introduced. TCP Port/Telnet monitoring goes a layer higher and confirms a specific service — such as port 443, 25, 3389 or a database port — is actually accepting connections. Together they answer: is the host up, is the path healthy, and is the service listening?

Yes. A Private Agent installed inside your network can Ping, Traceroute and Port-check external targets — SaaS endpoints, cloud services, upstream providers or the public internet — measuring exactly what your users and applications experience from inside the perimeter. This surfaces ISP degradation, upstream routing problems and egress firewall issues that an external-only check would miss.

Dotcom-Monitor operates 30+ monitoring locations across six continents, plus unlimited Private Agents you deploy inside your own environments. You can run the same network check from many public locations at once to see how reachability and routing differ by region, and from private locations to see the internal picture.

Ping and Port checks can run as often as every minute for critical hosts. Traceroutes run on a schedule (configurable from every 1 minute to every 3 hours) and can also be triggered automatically the moment an error is detected, so you always have fresh path diagnostics when something breaks.

Email, SMS, voice call, Slack, Microsoft Teams, PagerDuty and webhooks, with escalation policies and on-call rotation. Alerts can fire on hard failures (host unreachable, port closed) and on trend thresholds (latency above baseline, packet loss over a percentage), so you catch brownouts as well as outages.

No. Monitoring from the 30+ public locations requires no installation — you simply point a check at a public host. Private Agents are only needed when you want to monitor internal hosts, test between private networks, or measure connectivity from inside your perimeter outward.

Networks are on the critical path for websites, applications, remote work and branch connectivity — and they fail silently. A link can stay “up” while dropping packets, a route can shift to a slower path, or a service port can close while the host still pings. Continuous network monitoring surfaces outages, packet loss and latency drift in seconds, so teams reduce mean time to detection and protect SLAs instead of learning about problems from user complaints.

Run scheduled checks against your hosts and paths from the vantage points that matter: (1) pick a global location for public targets or install a Private Agent inside the network for internal ones, (2) configure ICMP Ping, Traceroute and TCP Port tasks with thresholds for latency and packet loss, and (3) route alerts to Slack, PagerDuty, email or SMS and schedule SLA reports. No appliances to rack — it’s fully SaaS.

Dotcom-Monitor uses ICMP for Ping reachability and latency, ICMP/UDP for Traceroute path analysis, and TCP for port and Telnet service checks. The wider platform also monitors HTTP/HTTPS, DNS, and SNMP-based device metrics — so one account covers reachability, routing, service availability and application-layer health.

Network monitoring software is a tool you install, host and maintain yourself; a network monitoring service is delivered as SaaS, with the vendor running the monitoring infrastructure and global locations for you. Dotcom-Monitor is a cloud service — no servers to stand up or patch — while still giving you an inside view through lightweight Private Agents you deploy in your own network.

Synthetic network monitoring proactively runs simulated checks — Ping, Traceroute, TCP port and higher-level transactions — against your network on a schedule from external locations and from inside agents, rather than only passively analyzing traffic that happens to flow. It detects problems continuously, including during low-traffic periods, and measures exactly what users and dependencies experience from each location.

Yes. Beyond simple up/down checks, Dotcom-Monitor captures round-trip latency, jitter and packet loss on every Ping, hop-by-hop timing on every Traceroute, and connect time on every port check. It baselines normal performance and alerts on statistical drift — so you catch brownouts and slow regressions, the core of network performance monitoring, not just outages.

Yes — a 30-day free trial with no credit card required. It includes every monitoring platform, all global locations, unlimited Private Agents, and 24/7 expert support.

See Your Whole Network — Inside and Out

Start monitoring Ping, Traceroute and Port checks from around the world and from inside your own network in minutes. Catch the outages, brownouts and routing failures before your users do.