!tCyGickeVqkHsYjWnh:nixos.org

NixOS Networking

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Declaratively manage your switching, routing, wireless, tunneling and more. | Don't rely on `networking.*` for interface and routing setup, use systemd-networkd, ifstate or NetworkManager instead. | Set `SYSTEMD_LOG_LEVEL=debug` to debug networking issues with networkd | No bad nft puns, please. | Room recommendations: #sysops:nixos.org255 Servers

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24 Jan 2026
@antifuchs:asf.computerantifuchsif you want to write fw rules in nix syntax, I can recommend https://github.com/thequux/nix-zone-firewall01:43:51
@leon:lhax.xyzleon joined the room.09:11:50
@tom:dragar.deTom

https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/merge_requests/2107

A clat in Networkmanager

09:54:58
@elisaado:matrix.orgelisaadooh cute10:23:23
@leona:leona.isleonabut also actually nftables syntax is quite easy to understand and use (in comparsion to iptables at least) and for the most common use cases, there are abstractions in NixOS. So unsure if an abstraction in Nixpkgs would actually help10:24:40
@magic_rb:matrix.redalder.orgmagic_rbOr if youre insane you can use https://github.com/chayleaf/notnft10:28:00
@antifuchs:asf.computerantifuchsI tend to go in circles between "this configuration language sucks, write it in nixlang" / "this evals really slow (and the nixlang repr isn't good), write it in configuration language"14:41:28
@nico:c3d2.deNicoThings like nftables can get merged from multiple files quiet well, so I think this is less of an problem. frr for example is much worse and you basicly are only allowed to have one file per router17:54:31
@kdk12:matrix.orgKDK12 set a profile picture.22:12:54
25 Jan 2026
@hedgemage:unredacted.org@hedgemage:unredacted.org left the room.19:03:46
@tim:stratum0.orgdadada changed their profile picture.20:33:50
@tim:stratum0.orgdadada changed their profile picture.20:38:53
@rappet:matrix.orgContact @rappet:rappet.xyz instead (I will not respond here) changed their display name from Contact @rappet:rappet.xyz instead to Contact @rappet:rappet.xyz instead (I will not respond here).21:01:31
@tim:stratum0.orgdadada changed their profile picture.21:17:30
@magic_rb:matrix.redalder.orgmagic_rbtest23:34:06
@magic_rb:matrix.redalder.orgmagic_rbmessages working? i see read receipts23:37:19
@magic_rb:matrix.redalder.orgmagic_rbsomeone just give me a confirmation that i unfecked it23:37:31
@sandro:supersandro.deSandro 🐧no, we cannot read your messages23:54:12
26 Jan 2026
@hexa:lossy.networkhexa (clat on linux when)yes, your messages don't reach us00:01:58
@magic_rb:matrix.redalder.orgmagic_rb :| 00:03:39
@magic_rb:matrix.redalder.orgmagic_rbThanks00:03:41
@magic_rb:matrix.redalder.orgmagic_rbOnce again i made sweeping changes to my homelab on a sunday evening00:04:03
@magic_rb:matrix.redalder.orgmagic_rbAnd once again im going to sleep way too late cause of that00:04:13
@elisaado:matrix.orgelisaadoxD00:09:46
@username:yatrix.org@username:yatrix.org left the room.07:28:05
27 Jan 2026
@whispers:catgirl.cloudwhispers [& it/fae] changed their display name from whispers (it/fae) to whispers [& it/fae].02:51:57
@debtquity:matrix.orgdebtquity

I don't think this is a nixOS issue, but does anybody know why nc would report Permission denied when testing tcp over ipv6?

[root@nixos] # nc -vz6 2607:f8b0:4023:1015::1b 465
nc: connect to 2607:f8b0:4023:1015::1b port 465 (tcp) failed: Permission denied

(IP is just a gmail MX server and queried it's AAAA record via dig)

09:15:42
@me:m4rc3l.deMarcel Permission denied is most likely the error code the firewall of the target device is sensing 10:02:09
@me:m4rc3l.deMarcel * Permission denied is most likely the error code the firewall of the target device is sending 10:02:14
@me:m4rc3l.deMarcelThis happens when the firewall rules use reject instead of drop10:02:27

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