Redirect Chain Checker
A redirect chain checker for the command line: follows each URL hop by hop with curl and flags loops, chains longer than two, 302s, HTTPS downgrades, non-200 endings and inconsistent www/https variants.
September 30, 2026
RDS Farm Windows Server 2025: Complete Deployment in 9 Steps
Build a session-based Remote Desktop Services farm on Windows Server 2025 with Server Manager or PowerShell: role placement, collections, profiles, certificates, RD Gateway, RemoteApps and a highly available Connection Broker.
September 30, 2026
Proxy Settings Group Policy: 6 Reliable Methods for Windows 11
Push a proxy server, bypass list or PAC file to Windows 11 and Windows Server with Group Policy Preferences, registry values, WinHTTP, Edge and Chrome policies and Intune, then stop users changing it and verify every layer.
September 30, 2026
Windows Firewall Group Policy: 5 Steps to Deploy Secure Rules
Manage Windows Defender Firewall on Windows 11 and Windows Server 2025 from a GPO: profile defaults, inbound rules for RDP, WinRM, ICMP and SMB, rule merging, logging, PowerShell GPO sessions, Intune and verification.
September 30, 2026
VoIP Bandwidth Calculator: Per-Call and Total Bandwidth by Codec
Works out how much upload and download a number of concurrent calls needs for a given codec, packet interval, IP version, SRTP and VPN tunnel, with a byte-by-byte breakdown.
September 30, 2026
VoIP Call Quality: Jitter, Packet Loss and MOS Explained With 3 Targets
The three numbers that decide VoIP call quality (delay, jitter and packet loss), the targets to aim for, how MOS and R-factor are derived, and a repeatable way to measure a connection before and after changes.
September 30, 2026
VoIP One-Way Audio Fix: 6 Checks for NAT and RTP
A step-by-step way to find why one side of a call cannot hear the other: read the SDP, check NAT settings in PJSIP and 3CX, confirm RTP reaches the PBX, and remove SIP ALG and short UDP timeouts.
September 30, 2026
VoIP Codec Bandwidth: G.711 vs G.729 vs Opus, Per-Call Figures
How much bandwidth each VoIP call really uses once packet headers are added, how SRTP and VPN tunnels change it, and how to size a connection for a given number of concurrent calls.
September 30, 2026
Disable SIP ALG on 9 Routers and Firewalls (One-Way Audio Fix)
What SIP ALG does, why it breaks modern VoIP, how to confirm it is rewriting your packets, and the exact commands to turn it off on MikroTik, Cisco IOS, Juniper SRX, FortiGate, SonicWall and Linux.
September 30, 2026
SIP Ports Firewall Rules: 4 Setups for CSF, firewalld and pfSense
Which ports a PBX really needs (SIP 5060/5061 and the RTP media range), how to open them in CSF, firewalld and pfSense, and how to restrict SIP to your trunk provider so scanners cannot brute-force extensions.
September 30, 2026
IP Address Converter
Convert an IPv4 address between dotted decimal, integer, hexadecimal and binary, and see its IPv4-mapped IPv6, 6to4, NAT64 and reverse-DNS forms.
September 29, 2026
IP Subnet Calculator (IPv4 CIDR)
Visual IPv4 subnet calculator: enter an address with a prefix or mask to see the network, broadcast, usable host range, masks, a bit-by-bit view, where the subnet sits in its parent block and how to split it.
September 29, 2026