[TheAceOfHearts]

On OS X I use Little Snitch. Unfortunately, it's not free.

I noticed in one of your screenshots you use LS as well, do they serve different purposes or was it just a project for fun?

[extra88]

Its "interface" is terrible but in Terminal you can run OS X's nettop [0] to see per-network connection, per-process bytes per second in and out.

[0] https://developer.apple.com/legacy/library/documentation/Dar...

[heywire]

Somewhat on topic, anyone know of something like Little Snitch for Linux?

[aroch]

There's LeopardFire: https://github.com/themighty1/lpfw

IIRC, it is the most recently active project. As far as I can tell, the whole user-facing, interactive firewall program never really caught on in linux land.

[eps]

> Unfortunately, it's not free.

What's so unfortunate about it?

[toyg]

It's not just nonfree (in speech and beer), but it's also very expensive for a personal product IMHO.

[user_0001]

lol, it's 30 euro. I was expecting something about 500!

[dghughes]

These days everyone it seems uses a mobile smartphone using apps usually free or less than $1 over that amount would seem excessive even $2 os let alone €30.

€30 ($43 + taxes Canadian to me) that's quite enough for software maybe not excessive but any more and I'd pass on it.

[toyg]

Most personal Mac apps are half that or less. It is expensive.

[rodgerd]

You can afford a Mac, but you begrudge the author of a useful utility $30 bucks for a perpetual license?

[toyg]

I don't "begrudge" anyone, I'm just pointing out where the price lies in the market.

[vic20forever]

Having purchased a computer in 1990 along with WordPerfect ($300 then - $540 in today's dollars) and Lotus 123 (another $300/$540), this makes me smile ;-)