Network Tools
Fast and reliable diagnostic tools for server and network administrators.
- Free, no sign-up needed
- Your queries are not stored
- Results in seconds
What does Ping show?
Ping sends small packets of data to a target server to measure whether it is up and how long it takes to reply (latency). It is usually the first step in figuring out why a website loads slowly or does not load at all.
- High latency does not always mean a problem; the physical distance between you and the target also adds delay.
- Some servers never reply to ping for security reasons; in that case, confirm the server is up with Port Check.
- Packet loss can be a one-off event; if the result looks suspicious, repeat the test a few times.
- If jitter is high, live voice or video calls are the ones most affected.
What does Traceroute show?
Traceroute lists every network hop your packet passes through on the way to the target and measures the delay at each one. It shows exactly where a connection problem happens: on your side, at your provider, or at the target server.
- Stars (*) in the list are not necessarily a problem; many routers intentionally ignore ping/traceroute requests.
- A hop where latency suddenly jumps is usually a long-distance link, such as a connection between cities or continents.
- If the route keeps timing out right before the target without ever reaching it, the cause is usually the target server's firewall.
- The route can differ slightly each time you run it; internet traffic is routed dynamically.
What does Port Check show?
Every server service (website, email, database...) runs on a specific port number. Port Check tests whether a service is actually listening on that port and whether it is reachable from outside.
Up to 25 ports can be checked at once.
- "Closed" and "no response" are different: closed means the server is reachable but nothing is listening; no response usually means a firewall silently dropped the request.
- For a website, ports 80 (HTTP) and 443 (HTTPS) are expected to be open.
- Ports 25, 465 or 587 are used to send email; 110, 143, 993 and 995 are used to receive it.
- Database ports (such as 3306, 5432) and remote desktop ports (such as 3389, 22, 5900) being open to the internet is a security risk; they should only be opened when needed and with restricted access.
- Up to 25 ports can be checked at once; enter a custom list separated by commas, for example 80,443,8080.
What Are Network Tools (IP Tools)?
IzHost Network Tools is a free toolkit that lets system administrators, developers and webmasters test and diagnose server and network connectivity from one place. Measure reachability with Ping and Traceroute, verify records with DNS and Reverse DNS lookups, and check that services are open and secure with port and SSL checks.
All queries run in real time over the IzHost infrastructure; no installation is needed and everything runs from your browser. Get answers to questions like "why won't the site load", "has DNS propagated correctly" or "is the port reachable" in seconds, and isolate network issues fast.
Tools
Ping & Traceroute
Measures whether a server is reachable and its response time (latency); Traceroute shows the network hops a packet takes to reach the destination and where it slows down.
DNS & Reverse DNS Lookup
Queries a domain's DNS records such as A, AAAA, MX, TXT, NS; Reverse DNS (PTR) finds which domain is assigned to an IP address. Verify DNS propagation and mail server PTR configuration.
Port & SSL Check
Tests whether a specific port (e.g. 80, 443, 25) is open; the SSL certificate check verifies the certificate's validity, expiry date and chain.
WHOIS & SPF Analysis
Shows ownership and registration details with an IP/domain WHOIS lookup; the SPF check verifies that your domain's email-sending authorization records are configured correctly.