Networking

Troubleshoot torrent no seeding despite downloads working. Optimize qBittorrent settings, port forwarding, NAT issues, and strategies for good ratio with 100+ torrents. DHT, PEX, seedboxes explained.

Learn to directly connect Acorp 9M56IC and Sprinter 56K modems using RJ11 6P4C cable without phone line. Fix NO CARRIER errors with AT commands, line simulators, and PPP alternatives for 33.6 kbps links.

Discover why IP addresses without hostnames appear as BAD_ADDRESS in Windows DHCP server console and fail ping tests. Learn causes like conflicts, multihomed clients, troubleshooting steps, and prevention for stable DHCP operation.

Troubleshoot VLESS Reality VPN intermittent connectivity issues causing browser tabs to hang. Learn causes, solutions, and optimization techniques for stable connections.

Learn why Cisco switch ports block when connected to Mikrotik switches and how to resolve the green-orange flashing issue. Fix duplex mismatches and VLAN configuration problems.

Troubleshoot intermittent high ping spikes (200-600ms) on 15 PCs in computer club network using MikroTik CCR2004. Causes: bufferbloat, queues, Faceit CS2 UDP traffic. Step-by-step fixes for gaming latency.

Troubleshoot random network drops, 'lost connection to server' errors in games, 403/404 site failures, and VPN connection issues on IP 45.10.35.94. Use packet loss tests, Obkio monitoring, traceroute, and escalation tips against ISP denials for reliable fixes.

Azure vWAN does not support site-to-site VPNs with Cisco FTDv NVAs per official docs. No successful deployments in vWAN hubs. Covers limitations, issues, troubleshooting steps, and alternatives like native gateways.

Fix iptables -C 'Bad rule (does a matching rule exist?)' error for NAT PREROUTING REDIRECT rules visible in -t nat -L. Learn table mismatch, --to-ports syntax, hostname resolution, nftables issues, and exact verification with -S and iptables-save.

Resolve 'can't verify peer's certificate from store' error for CyberGhost VPN on MikroTik RouterOS 7. Step-by-step guide covers certificate import, EAP-MSCHAPv2, digital-signature auth, and troubleshooting mikrotik ipsec routeros 7 issues.

Discover if you need L2 or L3 managed switches for a 60-user network across 3 floors with VLAN segmentation for admin, users, printers, cameras, and selective NAS access from another VLAN. Hybrid topology guide included.

Optimal hub-and-spoke VPN architecture using MikroTik IPsec and OSPF for fault tolerance and performance across international boundaries.

Resolve phone tethering DNS issue causing quasar.dev ERR_TIMED_OUT on laptop via Android hotspot. Phone loads fine due to direct DNS. Step-by-step fixes: override to 8.8.8.8, restarts, WARP VPN. Not .dev conflict—carrier DNS culprit.

HTTP/3 QUIC protocol blocked in Russia due to ISP censorship. Learn why curl works but browsers don't, and discover practical solutions to bypass QUIC restrictions.

Assign multiple hostnames like nextcloud.local to Ugreen NAS 4800 Plus using local DNS (dnsmasq, Pi-hole) and Nginx Proxy Manager. Bypass Asus router DHCP limits for portless Nextcloud access across your network.

Learn why iptables -C command fails to recognize NAT rules and how to properly verify iptables NAT rules using the correct syntax with -t nat option.

HTTP/3 not working with Angie server in Russia due to ISP network restrictions and QUIC protocol blocking. Learn about technical symptoms, server configuration, and workarounds.

Yandex Browser corporate edition (25.6.1.1048) blocks sites like Microsoft, HP, Samba.org—headers load but data hangs due to URLBlocklist policies. Diagnose via browser://policy, add URLAllowlist, or use Yandex VPN to resolve blokirovka saito v.

Learn how to set up a VPS proxy for accessing geographically restricted Russian resources like TI and Arduino. Effectiveness analysis and Roskomnadzor blocking considerations included.

Step-by-step guide to enable external SSH access to VirtualBox Ubuntu guest from internet via Windows host and router. Use bridged adapter, NAT port forwarding, or tunneling with security tips for optimal performance.