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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

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Resources for learning Linux Networking (iptables, namespaces, firewall, NAT, interfaces...)? preferably text resources (books, articles, etc) (lemmy.ml)

submitted 1 year ago by cyclohexane@lemmy.ml to c/linux@lemmy.ml

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Hi all,

I am looking for recommendations on resources to learn Linux networking. I am primarily hoping for text resources such as books, guides, blog series, articles, etc. I have trouble focusing on videos.

I am mainly targeting linux networking topics, such as how the linux networking stack works, and things like iptables, network namespaces, network interfaces, sockets, NAT, firewalls, internal IP-addressing, subnetting, routing, proxying, internal DNS, and anything that I may not know exists but is related to these concepts and linux networking in general.

Any recommendations?

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[–] db2@sopuli.xyz 3 points 1 year ago (2 children)

iptables? What year did you last use Linux?

https://wiki.debian.org/nftables

[–] funkajunk@lemm.ee 5 points 1 year ago (1 children)

IPv4? Why aren't you using IPv6?

Just because something can replace it doesn't mean everyone is going to abandon what's already working.

[–] db2@sopuli.xyz 2 points 1 year ago

IPv4? Why aren't you using IPv6?

I am. Right now in fact.

[–] cyclohexane@lemmy.ml 4 points 1 year ago (2 children)

Most tutorials, even recent ones, reference iptables. Never seen nftables. One example is WireGuard guide.

[–] db2@sopuli.xyz 5 points 1 year ago (1 children)

nftables has been the replacement for iptables since kernel 3.13.

https://wiki.nftables.org/wiki-nftables/index.php/What_is_nftables%3F

[–] walthervonstolzing@lemmy.ml 4 points 1 year ago

True; but many guides & tutorials that came out long after that still give their examples/instructions in iptables. Esp. those that involve ifup/ifdown/etc. scripts.

(although nftables is considerably easier to read, IMHO)

[–] Theoriginalthon@lemmy.world 2 points 1 year ago

I've never seen nftables, or should I say never noticed nftables, when ever I've seen documentation it's always referenced iptables, if it has mentioned nftables I'm guessing my brain just glossed over it. It's kind of like with networking configuring with /etc/network/interfaces rather than with netplan or network manager or systems or ifup ifdown, or anything else I've missed