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Author SHA1 Message Date
Daniel Micay
9b40bb90b8 split out input chain for loopback 2024-03-30 02:12:00 -04:00
Daniel Micay
811fcf593e enforce IPv6 DNS connection limit for /64 blocks 2024-03-30 02:12:00 -04:00
Daniel Micay
d95752bea6 move IP-based DNS connection limits to nftables 
This reuses the approach in cd59960e7b for
SSH connection limits with the same rationale.

PowerDNS also lacks a way to allowlist an address and was limiting our
ADoT reverse proxy to only being able to make 16 connections to the
backend. We could have worked around that by proxing every TCP DNS
connection but it makes more sense to switch to doing this via nftables
where new TCP connections can be completely avoided.

TCP DNS will be perfectly fine without window scaling and Selective
Acknowledgements for clients without TCP timestamps enabled.
 2024-03-30 02:11:21 -04:00
Daniel Micay
6b573fe227 dns-stats: show total TCP and UDP queries 2024-03-28 11:38:06 -04:00
Daniel Micay
8c929f02ac enforce IPv6 SSH connection limit for /48 blocks 
Since our primary servers using SSH to mirror their TLS certificates to
replicas are now allowlisted, we can use a stricter block size than we
could with the PerSourceMaxStartups approach in sshd.
 2024-03-28 11:38:06 -04:00
Daniel Micay
cd59960e7b move IP-based SSH connection limits to nftables 
We use synproxy for establishing all new connections to the SSH port and
enforce a connection limit between synproxy and the standard network
stack. Once the connection limit is reached, it's also enforced for new
connections at the synproxy layer. This avoids creating conntrack and
connection limit set entries until connections are already established
to avoid packets with spoofed source addresses exhausting these limited
size tables. Primary servers using SSH to mirror TLS certificates to
their replicas are allowlisted.
 2024-03-28 11:38:03 -04:00
Daniel Micay
16ef317460 nftables: rename output-reject to graceful-reject 2024-03-27 12:31:09 -04:00
Daniel Micay
66562272ac set preferred source for static IPv6 configuration 2024-03-26 21:50:12 -04:00
Daniel Micay
3de32072da consistently use short form IPv6 addresses 2024-03-26 21:24:50 -04:00
Daniel Micay
571644526d consistently list IPv4 routes before IPv6 routes 2024-03-26 21:24:50 -04:00
Daniel Micay
64e2e836d3 set preferred source for static IPv4 configuration 2024-03-26 21:24:48 -04:00
Daniel Micay
14e9cd5b76 use standard style for nftables sets 2024-03-24 16:23:54 -04:00
Daniel Micay
0ac67c38c3 allow IPv6 SSH for discuss.grapheneos.org 
This could be useful and disabling it isn't necessary for blocking IPv6
connections to the forum.
 2024-03-24 15:41:13 -04:00
Daniel Micay
7b64ffd4cd simplify nftables based on strong host model 2024-03-24 15:22:00 -04:00
Daniel Micay
59984a477c enforce strong host model via nftables 2024-03-24 14:36:24 -04:00
Daniel Micay
eb55afa3a8 reorganize sysctl configuration 2024-03-24 11:03:31 -04:00
Daniel Micay
51a4f8ca7a extend disabling ICMP redirects 2024-03-24 10:43:37 -04:00
Daniel Micay
ec2cbbdb4e enforce strict reverse path filtering via nftables 2024-03-23 13:35:49 -04:00
Daniel Micay
81fa5f8ebd use standard log rotation approach for wtmp/btmp 2024-03-20 23:43:48 -04:00
Daniel Micay
455ef92c18 disable chrony client log 
This is only needed to support clients using the interleaved mode. We
only use chrony as a server on our network servers and the clients are
only using SNTP via xtra-daemon so we don't need this. This frees up a
little bit of memory and avoids having a list of recent clients stored
in memory.
 2024-03-20 23:24:57 -04:00
Daniel Micay
e1df22a68f clean up session ticket rotation scripts 2024-03-20 22:55:40 -04:00
Daniel Micay
f35dc08868 split grapheneos.org hosts array 2024-03-18 21:10:47 -04:00
Daniel Micay
f6d6b0584b use larger journal for matrix.grapheneos.org too 2024-03-17 19:47:36 -04:00
Daniel Micay
bcfa2aef63 add basic inputrc 2024-03-14 15:48:53 -04:00
Daniel Micay
d5653b25f2 increase 0.grapheneos.network journal size 2024-03-12 11:40:26 -04:00
Daniel Micay
d57ca21e06 add sqlite-analyzer to attestation servers 2024-03-08 11:54:02 -05:00
Daniel Micay
e9d90bf88b lsof replaced with lsfd 2024-03-06 16:53:42 -05:00
Daniel Micay
c8d359af57 disable mkinitcpio fallback image 2024-03-04 13:13:58 -05:00
Daniel Micay
8591cb9354 raise 2.grapheneos.network journal size to 2G 2024-03-03 15:47:19 -05:00
Daniel Micay
14174e90f4 nginx-rotate-session-ticket-keys: drop unnecessary time sync 2024-03-03 09:57:30 -05:00
Daniel Micay
fb8775bb85 use checksum-based rsync 2024-03-03 09:55:02 -05:00
Daniel Micay
d8b70fce4f raise journal size for high log volume servers 2024-03-01 10:05:39 -05:00
Daniel Micay
16e3df0c39 raise max log size for OVH network instances 2024-02-29 13:58:38 -05:00
Daniel Micay
67a71a5cd3 count: drop 3rd gen Pixels 2024-02-24 19:19:59 -05:00
Daniel Micay
23207e99bf replace 4.releases.grapheneos.org server 2024-02-24 10:34:52 -05:00
Daniel Micay
c9cceb3bc0 explicit set XFS allocation group count 2024-02-24 10:28:10 -05:00
Daniel Micay
e0d5ff2fb2 enable deploy-initial script 2024-02-24 10:22:19 -05:00
Daniel Micay
b185e04a2c update install image to 2024.02.01 2024-02-24 10:21:24 -05:00
Daniel Micay
0899b7e984 update python dependencies 2024-02-23 13:04:36 -05:00
Daniel Micay
827324d15d stop generating unused en_US.UTF-8 locale 
We only use the C.UTF-8 locale now.
 2024-02-15 13:56:29 -05:00
Daniel Micay
5b25870f96 enable reboot on systemd crash caught systemd 2024-02-13 13:07:51 -05:00
Daniel Micay
2e7058e9c4 replace certbot log rotation with logrotate 2024-02-13 12:38:14 -05:00
Daniel Micay
e81e9feef3 replace MaxRetentionSec to stop excessive rotation 2024-02-13 11:30:56 -05:00
Daniel Micay
d39937fc6c disable currently unused energy aware scheduling 2024-02-12 16:13:45 -05:00
Daniel Micay
bd9a3d97d7 update python dependencies 2024-02-08 15:08:27 -05:00
Daniel Micay
81307b3bb9 add authorized_keys to gitignore 2024-02-03 17:48:56 -05:00
Daniel Micay
86d582ba2b add stripped down initial deployment script 2024-02-03 17:47:41 -05:00
Daniel Micay
154811ab1e add uptime to dns stats 2024-02-03 17:30:22 -05:00
Daniel Micay
963921413e add 8th generation Pixels to count script 2024-02-02 14:46:39 -05:00
Daniel Micay
a010e02c52 use leaner format for update log output 2024-02-02 07:26:36 -05:00