Network diagnostic tools for Mac.

IPv4/IPv6 network scanner

Discover hosts using ICMP, TCP connections, ARP/NDP caches and Bonjour/mDNS. Inspect names, MAC addresses and IEEE vendors when supported by the observations.

TCP port scanner

Test common ports, a list or a range against an IP address or DNS name. Distinguish successful connections, refusals, timeouts and errors over IPv4 and IPv6.

Advanced ping and packet loss

Measure latency, loss, minimum, maximum, median and percentiles. Use finite or continuous tests, adjustable ICMP payloads, time charts and annotated incident markers.

ICMP traceroute

Trace successive IPv4 or IPv6 hops with ICMP Echo, timings and optional host names; save the path locally.

DNS explorer and AXFR zone transfer

Query common records and IPv4/IPv6 PTR records, choose the server and UDP/TCP, then inspect TTLs, sections and raw responses. AXFR reads a zone only when its server permits it.

Whois and RDAP

Look up IP addresses, domains or AS numbers using RDAP with WHOIS fallback and source responses. New lookups need Internet; archived results remain locally available.

IPv4/IPv6 subnet calculator

Calculate CIDR and masks, network and IPv4 broadcast, reverse DNS names, binary/hex views, membership and overlap. Split and aggregate ranges exactly; multi-requirement VLSM plans remain future work.

TCP diagnostics and service identification

Inspect banners and advertised capabilities without an account: SSH, HTTP, SMTP, FTP, IMAP, POP3, LDAP, SMB, Redis, MySQL/MariaDB, VNC and Telnet. PostgreSQL offers a one-off SSLRequest check; versions and services are not inferred from a port alone.

HTTP/HTTPS tests on Mac

Test GET or HEAD, HTTP status codes, headers, redirects and bounded content. Inspect DNS/TCP/TLS/first-byte timings when macOS provides them without executing the page as a browser.

TLS, certificate and STARTTLS inspection

Inspect the received chain, names, expiry dates, fingerprints and macOS trust validation. Direct TLS and SMTP/IMAP/POP3/FTP STARTTLS are available; STARTTLS requires macOS 12.3+. This is not a full cipher-suite or revocation audit.

MTR

Monitor IPv4 or IPv6 hops with repeated ICMP traces, per-hop loss and latency statistics, without authentication.

UDP Port Scan

Probe UDP ports with DNS/NTP requests or empty datagrams; distinguish replies, OS refusals and indeterminate silence.

SNMP v1/v2c/v3

Browse bundled MIB definitions, read exact instances or selected branches over SNMP v1/v2c/v3 UDP, and save results locally.

SNMP gauges and bandwidth charts

Compare multiple SNMP measurements on graphs with shared or separate scales, statistics and local archives.

Local and SNMP ARP/NDP tables

Inspect the Mac’s neighbour caches or a remote device’s IP-MIB/MIB-II tables. Relate IP and MAC addresses with interface, state, time and observation source.

Read-only switch interface diagnostics

Read administrative/operational states, speed, aliases, errors, discards and SNMP counters. Calculate rates from usable Counter32/Counter64 values without modifying ports.

Basic SNMP inventory

Read eight standard objects: description, sysObjectID, uptime, contact, name, location, declared services and interface count. This inventory covers one device without automatic model or firmware identification.

MAC Finder

Find one MAC or read the accessible forwarding tables, with ports, VLAN mappings and raw evidence.

LLDP / CDP Neighbours

Read LLDP and CDP neighbours over SNMP, with ports, advertised addresses and raw evidence.

Integrated SSH and Telnet terminal

Open independent interactive sessions from a target or result. SSH uses the macOS client; Telnet supports legacy equipment. History stores connection events, not commands or session transcripts.

Wake-on-LAN

Explicitly send a magic packet to a MAC address with destination settings. Wake-up depends on hardware, configuration and the network path.

TFTP Server

Serve and receive files in a selected local folder over TFTP, with bounded transfers and history.

MIB library and browser

Search project-supplied modules, filter by vendor and inspect definitions/OIDs before a targeted query. Multiple MIBs can be combined; SMI resolution remains partial and user imports are not supported.

IEEE MAC prefix library

Search a MAC address, prefix or organisation in the local corpus. Prefix attribution identifies a registered organisation, not necessarily the device model.

Offline RFC library

Browse the 9,847 RFCs collected on 13 October 2026, including original texts and PDFs, with search, categories, status and supersession links. PDFs without a text layer remain readable without content search.

Ports, services and IP protocols

Browse IANA registries and curated application entries with search, filters and local RFC references. A common port suggests a service; it does not confirm its identity.

IP addressing library

Look up IPv4/IPv6 ranges, private, shared, local, multicast and reserved uses, historical IPv4 classes and RFC links. These references do not prove an address’s actual routing.

Routing protocol references

Browse routing principles and entries for RIP/RIPng, OSPF, IS-IS, BGP, EIGRP and related mechanisms. This is a reference library without router configuration.

LAN protocol references

Browse Ethernet, VLAN, STP, LACP, LLDP/CDP, QoS, ARP/NDP, 802.1X and related entries with cross-links. LLDP/VLAN documentation is not active topology discovery.

Local diagnostic history

Keep non-sensitive settings, observations, errors and partial results until manual deletion. Search, copy and reopen analyses without new requests; rerunning creates new measurements.

PDF and CSV network reports

Generate a local summary by IP, MAC or DNS name from history, then export PDF or CSV. Details include an explicit sample of 25 observations per analysis; complete measurements remain in history.

Raw Network Probes

Send bounded TCP SYN, TCP ACK or IP protocol probes and inspect correlated evidence.

DHCP Diagnostic

IPv4/IPv6. Discover DHCP servers on this local interface. No lease is requested or applied to this Mac.

Local Network Information

Inspect local Mac interfaces, IP/MAC addresses, TCP/UDP connections, IPv4/IPv6 routes and counters.

Ping · Interface

ICMPv4/v6. Choose a valid network interface, or use the system route.

SNMP Events

SNMPv1/v2c. Receive SNMP traps and informs locally, with bindings and history.

Packet Capture

Capture local traffic or inspect a PCAP/PCAPNG trace with packet fields and raw bytes.

Throughput Tests

Measure TCP or UDP throughput against an iPerf3 server, with local intervals and receiver results. Choose a public server…

Syslog Server

RFC3164/RFC5424 · UDP/TCP. Receive and inspect device log messages locally.

NetFlow Collector

NetFlow v5/v9 · IPFIX · UDP. Receive NetFlow and IPFIX exports with templates and flow details.

Wi-Fi Diagnostics

RSSI · SNR · Inspect the Wi-Fi information available from macOS.

Conversations

Use Conversations after stopping the capture to reassemble IP/TCP. TLS content remains encrypted.

Application analysis

DNS · DHCPv4/v6 · HTTP/1 · TLS. Application analysis uses captured messages only. An absent response is not a confirmed timeout. HTTP/2, QUIC and encrypted application data are not decoded.

PCAP/PCAPNG · Statistics view

Graph captured throughput and packets per second, with time filtering for protocols, endpoints and conversations.

Contact support…

Report a bug, request a feature or suggest an improvement from the app after reviewing your message. No diagnostics or files are attached automatically.

Native app for Apple Silicon Macs

macOS 12 minimum, SwiftUI/AppKit interface, local tools and bundled corpora. Intel Macs and an iOS app are not currently supported.

Parallel analyses and independent tools

Use standalone tools in tabs or detached windows, with independent analyses, stopping, background operation and reopening.

Interface in ten languages

Interface available in eleven languages, including right-to-left Hebrew and Arabic.

Light, dark and automatic themes

Follow macOS appearance or choose a persistent theme; panels and inspectors can be resized according to the tool.

Filterable results and raw data

Sort, filter and copy results; inspect OIDs, bytes and source responses. The Points to examine filter and latency thresholds help locate relevant observations.

IPv4, IPv6 and target resolution

Tools offer both families and automatic selection according to their capabilities. HTTP/HTTPS follows macOS resolution; IPv6 discovery uses known or explicit candidates rather than exhaustive scanning.

Offline review and history without secrets

Measurements and references stay on the Mac. New remote queries follow the selected target; SNMP communities and terminal input are not stored in archives.

Bilingual help and manuals

Offline help, PDF manuals and version history are provided with the local stable release. Bundled documentation is not regenerated for every beta.

SNMP SET

Change a writable SNMP value after explicit confirmation, then check the value read back. No automatic resend.

Trial and activation

Seven-day trial and online activation of a perpetual licence from the application.