Network tools

Free online TCP ping — check whether a host and port (default 443) are reachable and measure round-trip latency. A TCP connect test, not ICMP. No install.

Free online open-port check. Check whether common TCP ports (SSH, HTTP, HTTPS, SMTP, RDP, MySQL, Redis...) are open on a host, and get warned about exposed sensitive services.

Scan a host's open ports (TCP 1-1024 + key UDP) and deep-inspect each live service — SSH algorithms, SMTP/IMAP TLS, DNS open-resolver, SMB signing, SNMP, exposed databases — with a risk badge and the exact fix for every issue.

Free SSH server security audit. SysGlass TCP 22 for the banner/version, host-key, key-exchange, cipher and MAC algorithms, weak/legacy primitives, the obsolete SSH protocol 1, and the 'none' cipher — with concrete hardening fixes.

Free SMB security check on TCP/445. See whether Windows file sharing is exposed to the internet, the negotiated dialect, whether the obsolete SMBv1 is enabled, and whether message signing is required — the surface behind EternalBlue, WannaCry and NTLM relay.

Free SNMP exposure check on UDP/161. See whether a device answers the default 'public' community, runs clear-text SNMP v1/v2c, is reachable from outside the management network, or can be used as a UDP amplification source — with SNMPv3 fixes.

Free NTP amplification check on UDP/123. Test whether a time server answers the mode-7 monlist query (CVE-2013-5211) or unauthenticated mode-6 control queries — high-impact DDoS reflection sources — and see the measured amplification factor, with fixes.

Free IPMI / BMC exposure check on UDP/623. Detect an internet-facing server management plane (iDRAC, iLO, IMM, Supermicro) and the cipher-suite-0 backdoor, anonymous login, and the RAKP hash-disclosure flaw (CVE-2013-4786) — with isolation fixes.

Free online traceroute from a remote server. Trace the network path to any host or IP and see every hop's address, reverse DNS, and round-trip time. Runs from our nodes (IPv4 & IPv6) — no client needed.

Free online MTR from a remote server. Combines traceroute and ping: probes every hop multiple times and reports per-hop packet loss and latency (last, avg, best, worst, jitter) for IPv4 and IPv6.

Free BGP looking glass. Enter an IP, prefix, ASN or domain to see the announced prefix, origin AS and holder, RPKI validity, global routing visibility (RIS peers), sample AS paths, and the managing RIR (ARIN, RIPE NCC, APNIC, LACNIC, AFRINIC).