Kyberlink vs netcat

Kyberlink is a fast, beautifully designed WireGuard® VPN client for iPhone and iPad. Bring your own WireGuard configuration — from your home lab, a VPS, or your workplace — and connect with a single tap. Kyberlink is a client, not a VPN service: no accounts, no subscriptions, and we operate no servers. Your traffic goes straight to the server in your own config, and your keys never leave your device unencrypted. WHY KYBERLINK • One-tap connect with a clean, animated home screen • "Am I actually protected?" — a built-in Connection Check confirms your traffic is encrypted, exiting through the VPN, and using your tunnel's DNS • Connect to Fastest — pings your servers and connects to the lowest-latency one, ideal when you keep multiple regions • Import in seconds — scan a QR code, open a .conf file, or paste a config PRIVACY & SECURITY, DONE RIGHT • Private keys stored in the iOS Keychain with device-only protection • Optional iCloud backup is encrypted on-device (AES-GCM); the key lives only in your end-to-end-encrypted iCloud Keychain • App Lock with Face ID / Touch ID, plus biometric confirmation before exporting keys • No analytics, no tracking, no telemetry — ever POWERFUL, YET SIMPLE • Multiple tunnels with groups, notes, reordering, and duplication • On-Demand VPN (Wi-Fi only, cellular only, or always on) • Trusted Wi-Fi networks that auto-disconnect at home or the office • Allow Local Network — reach your printer or NAS while connected • Server-down alerts if a tunnel stops responding while you're connected • Live stats: uptime, real-time speed, last handshake, and per-tunnel data usage • Latency testing and public IP display • Connection history log EVERYWHERE YOU NEED IT • Home Screen and Lock Screen widgets • Live Activity & Dynamic Island while connected • Siri Shortcuts — "Connect to Work VPN," "Connect to fastest" • Full iPad support, all orientations • Localized in English, Turkish, Spanish, and German Kyberlink requires a WireGuard configuration from your own VPN server or provider. "WireGuard" is a registered trademark of Jason A. Donenfeld. Kyberlink is not sponsored by or affiliated with the WireGuard project.

netcat is a network diagnostics toolkit for network engineers, admins and developers. Long-press any address or host name in a result to send it to DNS Lookup, Whois, Ping, MTR, Port Scan, Port Connect or IP Calculator. Recent runs are on the Home tab: tap one to run it again with the same options. NETWORK INFO • Your public IPv4 and IPv6 as sites in China see them and as other sites see them • Where each address is registered, from an IP database inside the app • Interfaces with their addresses, prefix lengths and MTU; gateways, DNS servers and the routing table DNS CHECK • Reachability and latency of your DoH, DoH3, DoT, DoQ and classic UDP / TCP DNS servers • Any address format, DNS stamps, bulk import and bootstrap IPs, plus a default list of public resolvers to import • Answers, DNSSEC, TLS version, ALPN, HTTP version and per-phase timing DNS LOOKUP • Like dig: the system resolver or any DoH, DoH3, DoT, DoQ, UDP or TCP server • Common record types, reverse lookups from an IP address, DO / CD / RD flags • All response sections, EDNS, NSID, EDE and DNSSEC records; dig-style output WHOIS • Registration data for domains, IP addresses / prefixes and AS numbers • RDAP first, classic whois where a registry has no RDAP, following referrals to the registry and registrar • Registrant, registrar, dates, status, name servers, DNSSEC, network range, organization and abuse contact at a glance; raw responses to expand and export • Or query any whois or RDAP server of your choice PING • ICMP and TCP modes, up to 6 targets in parallel • A latency bar chart per target that makes spikes and losses obvious • min / avg / max / sd, P50 / P90 / P99, jitter and loss • Adjustable interval, timeout, count, payload size and TTL; ping-compatible output MTR • Continuous traceroute with per-hop Loss%, Last, Avg, Best, Wrst and StDev • Every hop's recent rounds on one latency scale: see where delay is added; loss on the path in red, routers that only rate-limit their replies in grey • Reverse DNS names, IPv4 / IPv6, export in mtr --report format PORT SCAN • TCP connect scan of port lists and ranges, like nc -z • Open, closed and filtered ports with response times and service names • Long-press a port to connect to it PORT CONNECT • Connect to any host and port over TCP, UDP or TLS, like nc • Name lookup, TCP and TLS handshake times; TLS version, cipher suite, ALPN and the certificate chain with its trust verdict • Send text or hex and read the replies as text or a hex dump IPERF3 • Client and server roles, compatible with standard iperf3 in both directions • TCP / UDP, upload / download, parallel streams, UDP bitrate • Per-second throughput chart, sender / receiver rates, retransmits, UDP jitter and loss IP CALCULATOR • IPv4 and IPv6 subnets: network, netmask, wildcard, broadcast, host range and address counts • Address type (private, CGNAT, link-local, documentation, NAT64…) and the reverse DNS zone PRIVACY No account, no ads, no analytics, no data collection.