Networking

Calculate online ACL wildcard masks from IPv4 CIDR, dotted subnet masks, host lines, or any entries, then audit match size before writing Cisco ACEs.

Check ad network signals online from a public URL, compare page evidence with ads.txt sellers, and flag supply-path gaps for faster monetization reviews.

Look up ASN records online to identify holder, routed prefixes, neighbouring ASNs, and public registry or peering details for incident and routing triage.

Calculate online BGP route scale from prefixes, peers, path attributes, memory budget, and churn so routers are sized before full-table growth risks.

Calculate online bandwidth-delay product, per-stream TCP window targets, current fill, packets in flight, and stream guidance for WAN transfer tuning.

Check DNSBL status online for a host or IP across selected mail blocklists, with TXT evidence, resolver context, and shareable exports for mail triage.

Inspect certificate transparency online from a PEM or DER certificate, compare logged issuances and DNS coverage, and flag revocation or hostname drift.

Calculate online DHCP scope capacity from subnet, pool, exclusions, reservations, and growth so admins can spot lease pressure before users are blocked.

Calculate online DNS cache capacity from query rate, TTL, hit rate, RRset size, DNSSEC overhead, memory budget, and reserve headroom for resolver sizing.

Generate a domain DNS configuration report with core record inventory, mail-auth coverage notes, TTL spread context, and resolver timing snapshots.

Trace DNS delegation online from zone cut to final answer, compare resolver views, and flag DNSSEC or negative-cache clues before rechecking.

Report online DNS denial evidence from NXDOMAIN or NODATA replies, NSEC/NSEC3 records, SOA retry timing, and resolver-view caveats for incident review.

Check DNS glue and delegation online, compare Cloudflare, Google, and Quad9 views, spot nameserver gaps, and export evidence for DNS repair tickets.

Check DNS propagation online across public resolvers, compare answers, TTL, DNSSEC flags, and latency to judge DNS cutovers before traffic shifts.

Enumerate DNS records online across public resolvers with PTR, DNSSEC, mail-policy, and posture checks to spot misconfigurations during authorized reviews.

Lookup DNS records online for a domain or IP, inspect TTL and DNSSEC response signals, and export clean tables or charts for troubleshooting.

Calculate DNS TTL change windows online from current, lowered, and negative TTLs, safety margins, cache outliers, and observation cycles for safer cutovers.

Check online DNS wildcard behavior across random leaf, deep, boundary, DNSSEC, and resolver probes to confirm inherited answers before DNS changes.

Validate DNSSEC records online to inspect keys, signatures, denial indicators, and resolver AD responses so you can spot trust-path issues quickly.

Convert online data transfer rates between bit and byte units, apply overhead, compare payload ETAs, and choose link tiers for capacity planning.

Craft online DNS-over-HTTPS query packets with EDNS options, GET or POST replay commands, wire-format hex, and live resolver checks for DNSSEC diagnostics.

Calculate online ECMP path capacity from healthy paths, per-path rate, demand, hash efficiency, and headroom to plan failure runway and maintenance drains.

Check EDNS Client Subnet behavior online by comparing DNS answers, echoed scope, TTL drift, and resolver baselines for routing and cache debugging.

Inspect online EDNS option behavior with DoH wireformat probes, OPT ledgers, packet sections, and replay commands for DNSSEC and resolver debugging.

Calculate online ephemeral port exhaustion risk from port range, source IPs, connection rate, hold time, and NAT caps for outbound capacity planning.

Calculate online Ethernet frame efficiency from payload size, VLAN tags, wire overhead, and link rate to estimate payload goodput and capacity impact.

Calculate optical fiber link budget online from transmit power, receiver sensitivity, path loss, reserve, and overload checks before approving a span.

Calculate online file transfer time from size, bandwidth, latency, window, and loss assumptions so you can plan uploads, backups, and cutovers reliably.

Analyze online firewall deny logs by source, destination, port, direction, and watched services to prioritize repeated blocks for rule review.

Calculate RF path loss online from frequency, distance, gains, and planning thresholds to estimate receive power, reserve margin, and workable link range.

Check HTTP redirects online hop by hop with method, timeout, TLS, and user-agent controls to confirm the final destination, delay, and HSTS status.

Calculate online IPsec ESP tunnel overhead, usable inner MTU, TCP MSS clamp, NAT-T impact, and padding headroom for safer VPN MTU planning.

Plan IPv4 subnet allocations online from a parent CIDR block, size each segment by host demand, and export clear address plans for rollout worksheets.

Calculate IPv4 supernets online from CIDR or dotted-mask lists, compare cover routes with exact aggregates, and spot exposure before route changes.

Convert online IPv6 addresses between compressed, expanded, dotted-tail, hextet, binary, and reverse DNS views for cleaner reviews and documentation.

Calculate online IPv6 subnet ranges, canonical CIDR, reverse-DNS zones, special-address warnings, target prefixes, and EUI-64 samples for allocation planning.

Plan online IPv6 prefix allocations from a parent CIDR, compare site and LAN capacity, and flag /64 and nibble-boundary risks before routing changes.

Check IP geolocation online from a public IP, domain, or URL to inspect approximate location, ASN, timezone, reverse DNS, and map context for support triage.

Calculate IPv4 subnets online from CIDR or dotted masks, inspect host ranges, wildcard math, and VLSM split plans before allocating network space.

Calculate IPv4 subnet splits online from any address in a parent block, compare equal child CIDR options, and export rollout-ready subnet ledgers.

Calculate online jumbo frame savings from payload rate, MTU sizes, eligible traffic, and overhead model to plan packet-rate and wire-time relief before rollout.

Calculate online LACP bundle capacity from member count, link speed, failures, hash efficiency, reserve, and demand to plan headroom and flow risk.

Calculate online load balancer pool capacity from backend RPS, weights, health, utilization, growth buffer, and N+ reserve for safer traffic planning.

Check MAC addresses online to normalize formats, inspect OUI and randomization signals, and compare vendor evidence for Wi-Fi, inventory, or asset triage.

Calculate online effective MTU and TCP MSS after VPN, GRE, VXLAN, PPPoE, VLAN, and safety overhead to choose safer tunnel clamps and DF ping probes.

Check MX records online, compare public resolver answers, flag Null MX, fallback, and alias issues, and review host readiness before mail changes.

Calculate online NAT pool capacity from public IPs, usable ports, reserve, user sessions, and hot destinations for safer egress planning.

Check nameserver delegation online for glue, SOA consistency, resolver drift, address health, and repair priorities before registrar or DNS provider changes.

Analyze online NetFlow and IPFIX flow rows by source, destination, conversation, service, protocol, or port to pinpoint top talkers and service-heavy traffic.

Generate online netcat commands for listeners, scans, TLS probes, and proxy sessions with shell-ready flags for faster socket testing and runbook prep.

Calculate online network throughput from link speed, RTT, TCP window, packet loss, and transfer size to plan bottlenecks, tuning moves, and copy time.

Calculate OSPF interface cost online from reference bandwidth, interface speed, integer policy, and manual overrides for routing-change planning.

Calculate online packet capture storage from link rate, duration, snap length, format overhead, filters, compression, and reserve for safe disk planning.

Analyze online ping output for packet loss, RTT spread, jitter, timeout lines, and high-latency samples to document network reachability issues.

Compare online DNS resolver policy differences across open, threat, and family filters to spot likely blocking, cache drift, or DNSSEC issues fast.

Check reverse DNS online for IPv4, IPv6, or hostnames, confirm PTR and forward-confirmed rDNS, and catch naming or resolver issues during mail troubleshooting.

Check online SRV and NAPTR discovery for SIP, SIPS, XMPP, and LDAP domains, compare resolver views, and find DNS routing gaps before service rollout.

Check certificate chains online from a live host or PEM text, verify issuer links and hostname coverage, and export a deployment-ready PEM bundle.

Check SSL posture online for one hostname, then compare endpoint grades, trust paths, protocol support, and renewal risk before fixing HTTPS drift.

Check certificate expiry online for a live host, confirm SAN coverage, and export renewal facts so you can replace the right TLS certificate before outages.

Check OCSP revocation status online for a live host or pasted certificate, then review responder timestamps, transport evidence, and replay-ready output.

Decode SSL certificates online to inspect issuer, SAN entries, validity dates, fingerprints, and usage flags for faster X.509 troubleshooting or audits.

Validate TLS-RPT records online by checking TXT tags, rua report URIs, resolver answers, and related policy signals before publishing mail reporting.

Trace online CNAME alias chains through public resolver views, terminal DNS records, TTLs, loop limits, suffix checks, and drift before DNS cutovers.

Analyze online traceroute and MTR hop output for timeout rows, latency steps, packet loss patterns, and exportable evidence for network triage.

Check online URL blacklist status across Safe Browsing, SURBL, and URL-structure signals, then triage suspicious links with scope-aware evidence before opening.

Plan online IPv4 subnet splits with visual ranges, host counts, and exportable tables for clearer VLAN, ACL, and handoff-ready allocation reviews.

Estimate online WAN latency from route distance, fiber speed, hops, queues, jitter, and RTT targets to plan circuits, regions, and app placement.

Check domain registration data online with RDAP-first lookup and WHOIS fallback to review registrar, status, nameservers, and renewal timing before transfers.