Omid's Personal Investigation: Why & How Public DNS Servers Really Operate in Iran

by Zamani 7 months ago

macOS • xterm-256color • zsh 118 views

Quick network diagnostic tests to verify DNS server locations and routing paths from Iran.

Initial verification commands:

curl: gets public IP to confirm location
dig: queries Google’s resolver for geolocation data
ifconfig: shows local network interface details
netstat: displays current routing table

Main DNS testing commands:

mtr: traces network path with packet loss stats to each DNS server
dig: queries ASN info to identify server ownership
curl: fetches Cloudflare trace data showing datacenter location
nslookup: performs reverse DNS lookups
ping: measures basic connectivity and response times
traceroute: maps full routing path to destination servers

Testing these DNS servers: 1.1.1.1, 8.8.8.8, 8.8.4.4, 4.2.2.2, 4.2.2.4 Results show all servers route through European datacenters, not Iran.

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