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NixOS ACME / LetsEncrypt

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Another day, another cert renewal45 Servers

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4 Dec 2021
@m1cr0man:m1cr0man.comm1cr0man7 ticket closures in one :D that always feels good19:07:16
11 Dec 2021
@m1cr0man:m1cr0man.comm1cr0man

Systemd 250 notes from Phoronix:

There is also a new tool called systemd-creds for dealing with the credentials. This can be used for SSL certificates, passwords, and other similar data.
12:05:15
@m1cr0man:m1cr0man.comm1cr0manIt seems to kind of be like ansible-vault, where decryption happens when the service is started. Kind of neat because it can/will use a TPM module13:53:17
@hexa:lossy.networkhexaohhhh14:02:23
@hexa:lossy.networkhexa I wish element had a sensible forwarding mode … for #tpm:nixos.org 14:02:57
@hexa:lossy.networkhexawhere the general consensus was, that tpm tooling on linux is abysmal14:03:20
@m1cr0man:m1cr0man.comm1cr0manOh yeah, I know that XD Tried to set up my server's ZFS to unlock via the TPM once. Did not find a workable solution :P 14:04:29
@m1cr0man:m1cr0man.comm1cr0manThere's some other nice stuff in here that seems generally applicable too. The systemd-homed updates are super intriguing. I've always wondered if it would be possible to set up on-demand services for users via homed (namely jupyter notebooks) and safe SSH environments for student-esque use with it. Seems like a lot of these things would make that a bit easier14:06:52
@andi:kack.itandi-The TPM tooling is "by spec" and that is probably the issue. The spec is horible and allows everything but isn't tailored for 99% of the usecases.15:03:41
13 Dec 2021
@m1cr0man:m1cr0man.comm1cr0manTrying to rebase my PR and write a test for listenHTTP. Found a bug in the log for handling ports < 1024, even when running as root. Not sure why yet. It must be one of the systemd protection flags on the service but I haven't narrowed down which one. It's not SystemCallFilters23:12:06
@moritz.hedtke:matrix.orgmoritz.hedtke The capabilities one?23:44:31
14 Dec 2021
@m1cr0man:m1cr0man.comm1cr0man To be specific, lego is giving bind: permission denied even when running as root. I haven't looked into it any further, just reread that msg I sent and realised how unclear it was :P 22:39:49
@hexa:lossy.networkhexaneed to see the systemd unit to make a proper statement on the matter - but the first thing is … privateusers will prevent passing of capabiltiies23:56:33
18 Dec 2021
@m1cr0man:m1cr0man.comm1cr0manI might ask in the systemd channel14:25:30
@m1cr0man:m1cr0man.comm1cr0manThere is no use of privateusers, fwiw. THat's good to know though :)14:25:49
@hexa:lossy.networkhexahappy to take a look if you point me to the unit14:44:33
@m1cr0man:m1cr0man.comm1cr0manAha! Got it14:45:23
@m1cr0man:m1cr0man.comm1cr0man CapabilityBoundingSet = [ "CAP_NET_BIND_SERVICE" ]; 14:45:24
@hexa:lossy.networkhexacapabilities need to be requested by the program 14:45:42
@m1cr0man:m1cr0man.comm1cr0manA new day + a fresh mind is the best solution finder14:45:42
@hexa:lossy.networkhexaonly AmbientCapabilities are active without being requested14:45:59
@hexa:lossy.networkhexaand the bounding set limits ambient capabilities IIRC14:46:12
@m1cr0man:m1cr0man.comm1cr0man Well the old line was AmbientCapabilities = "CAP_NET_BIND_SERVICE" and it couldn't bind to ports < 1024 14:46:38
@m1cr0man:m1cr0man.comm1cr0manso idk, the priority is capBoundingSet > AmbientCapabilities?14:47:05
@hexa:lossy.networkhexathe bounding set limits capabilities altogether, so yeah14:47:25
@hexa:lossy.networkhexasorry, I missed that during review as well 14:48:26
@m1cr0man:m1cr0man.comm1cr0manright that makes sense14:48:29
@m1cr0man:m1cr0man.comm1cr0mannb! Fixed now and I have written a test for it :)14:48:41
@hexa:lossy.networkhexa❤️14:48:50
@m1cr0man:m1cr0man.comm1cr0manhttps://github.com/NixOS/nixpkgs/pull/147784 ok so this PR technically still needs a review from someone on the ACME team that isn't me ;) 15:08:08

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