Traceroute, Looking Glass and Route Servers
IANA Root-Zone Whois Index by TLD Code
robtex swiss army knife internet tool
Hurricane Electric IPv6 Tunnel Broker
SixXS IPv6 deployment
DNSInspect - check the DNS setup of a domain.
Zonemaster - check the DNS setup of a domain.
DNS Bajaj - check the delegation of a domain.
dnscheck.tools - check your DNS resolver setup.
Cisco Support Tools
Feature Navigatior
Cisco Notification Service (login required)
Wireless Geographic Logging Engine
Linux Wireless
hostapd - Linux IEEE 802.11 AP and IEEE 802.1X authenticator
Proxy autoconfiguration URL for the local elho.net network:
https://www.elho.net/proxy.pac