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The latest blog posts to take off on Hacker News. 1,615 posts.

Networking & Internet
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425

How does Linux NAT a ping?

A few months ago, I found myself wondering how a command like ping 1.1.1.1 works from within a private network. In most private networks, multiple hosts connect to the Internet through a router. For IPv4, the router performs network address translation (NAT) by rewriting the original host’s source address to the…

430

Grave flaws in BGP Error handling

Border Gateway Protocol is the de facto protocol that directs routing decisions between different ISP networks, and is generally known as the “glue” that holds the internet together. It’s safe to say that the internet we currently know would not function without working BGP implementations.

440

Free Public WiFi

Once, many years ago, I stayed on the 62nd floor of the Westin Peachtree Plaza in Atlanta, Georgia. This was in the age when the price of a hotel room was directly correlated with the price of the WiFi service, and as a high school student I was not prepared to pay in excess of $15 a day for the internet. As I…

447

Underwater ears everywhere

Programming note: the subscribe link was broken for a while because I am bad at computers (yet another case of "forgot to enable the systemd unit"). It's fixed now. The unsubscribe link was also broken and is now fixed but, you know, maybe that was a feature. Did wonders for reader retention.

450

ProtonMail Rewrites Your Emails

I switched to ProtonMail a few years back after getting fed up with Google. It’s been mostly acceptable, but a few months ago the Android client started mangling emails – if I hit “send” too soon, it would send out only part of what I’d typed; I had to wait 10 seconds or so after I finished typing before hitting send…