6 tutorials filed under Networking. Select “All” to see the full library.
Is your server IP blocked in Iran? Compare ping and TCP from both sides with check-host.net, avoid the curl https://IP trap, decode 10.10.34.36, and fix it.
Does an Iran VPS have international internet access? Dated tests from inside Iran: TCP works, QUIC is dropped, Telegram's API times out, and upload is free.
Website slow in Iran on the national internet (NIN)? Measure TTFB from inside Iran, find every foreign host your page loads, and self-host fonts and scripts.
What is a CDN and how does it speed up a website? Edge caching, HIT vs MISS, origin protection, and choosing a CDN for visitors in Iran, in plain English.
Set up a GRE tunnel between two servers: choose by route quality, not CPU, compare GRE, IPIP and VXLAN, open protocol 47, and fix MTU with MSS clamping.
Reduce website latency in Iran: measure ping and TTFB with mtr and curl, and see why an Iranian data center can cut TTFB 4 to 7 times. Test it yourself.
With hourly billing you can build a server, practice on it and delete it, paying only for the few hours it ran. Estimate the exact cost with the pricing calculator before you sign up.
