commit becd1626b11d8233cb667c09f09eb63ac5d6adc5 · sapphic.moe/flake

+14

secrets/abuseipdb.age

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       -----BEGIN AGE ENCRYPTED FILE-----

     

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       YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IHNzaC1lZDI1NTE5IGN2U2dKQSA5eHJO

     

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       L0V2dE1tem9DSy92ZnBweG55YjRmVjdrM3FPN24vZUE0K1E2Smx3ClFiQXpiUCt6

     

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       N0JBTm0yZWI5Q3lYTjVlWXYzTkZBTFpLY0dqSE5INmlITDgKLT4gc3NoLWVkMjU1

     

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       MTkgMUNUOTd3IFYxRXhpWS9tQnl0SEc5RGo2Ymhyb3Jqa0dVN0twcEplK3lLR0tl

     

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       SkJBeWsKMFYya3FtRTg0Um9mRnNWbElMWkdMNEE5RlExTkNQaUpGRUEzK2pOdzc0

     

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       RQotPiBzc2gtZWQyNTUxOSBlUDNUdFEgVDRrNUNSWXl5bWlXWFEvdmpVZWtsRTJr

     

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       WmU3OWhkTFlVeUlpTW1vekxHbwpxOFJPQTFsN2RQUmY0YzRUVlBBR0JiL0FzbHZy

     

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       b2pqQzNJd1ZSSElYVHFrCi0+ICctZ3JlYXNlICFofCAlKytiRHFHClZvUQotLS0g

     

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       Mi9YUUNMK0pxc1dOSmt1VWxjcG8yUTl4VmQxT3RKQm9JZUoxK1ZyUUZ0Ywr+XbIf

     

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       30MbeXvOVwJSQMLcc/m9044pc1UXNcO6aLrbShVeVMs95zg18luAiE0V4ML7Ldrs

     

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       LTduxwbz/k3Tr+H4AKTCocXsilVmGhqaEZ6ST0aEjMHvuXFiXSHu8upnBybYrDfy

     

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       pp+sJnTp4/SfL9y+WA==

     

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       -----END AGE ENCRYPTED FILE-----

secrets/secrets.nix

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         ];

     

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       in

     

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       {

     

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         "abuseipdb.age".publicKeys = keys;

     

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         "bluesky-pds.age".publicKeys = keys;

     

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         "caddy.age".publicKeys = keys;

     

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         "destiny-labeler.age".publicKeys = keys;

services/caddy/default.nix

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               encode zstd gzip

     

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             }

     

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           '';

     

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           logFormat = ''

     

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             level info

     

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             format json

     

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           '';

     

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         };

     

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         settings.firewall.allowedTCPPorts = [

services/default.nix

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           ./bluesky-pds

     

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           ./caddy

     

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           ./destiny-labeler

     

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           ./fail2ban

     

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           ./glance

     

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           ./knot

     

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           ./lanyard

+138

services/fail2ban/default.nix

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       { config, pkgs, ... }:

     

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       {

     

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         age.secrets.abuseipdb = {

     

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           file = ../../secrets/abuseipdb.age;

     

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           mode = "600";

     

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           owner = "abuseipdb";

     

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           group = "abuseipdb";

     

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         };

     

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         services.fail2ban = {

     

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           enable = true;

     

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           # Include curl for making HTTP requests to AbuseIPDB

     

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           extraPackages = [ pkgs.curl ];

     

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           # Globally applicable settings for all jails

     

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           daemonSettings = {

     

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             Definition = {

     

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               # How long to keep an IP in the ban list (in seconds)

     

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               # 1 day = 86400 seconds

     

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               bantime = "86400";

     

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               # How far back to look for failures (in seconds)

     

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               # 1 hour = 3600 seconds

     

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               findtime = "3600";

     

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               # Number of failures before banning

     

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               maxretry = 3;

     

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               # Allow fail2ban to write to syslog

     

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               logtarget = "SYSLOG";

     

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             };

     

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           };

     

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           # Ignore local networks and trusted services

     

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           ignoreIP = [

     

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             "127.0.0.1/8"

     

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             "::1"

     

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             "100.64.0.0/10" # Tailscale IP range

     

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           ];

     

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           # Jails for protecting various services

     

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           jails = {

     

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             # SSH protection - monitor failed login attempts

     

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             sshd = {

     

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               enabled = true;

     

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               port = "ssh";

     

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               filter = "sshd";

     

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               logpath = "%(syslog_authpriv)s";

     

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               backend = "auto";

     

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               maxretry = 5;

     

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               findtime = "3600";

     

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               bantime = "86400";

     

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               action = [

     

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                 "iptables-multiport[name=SSH, port='ssh']"

     

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                 "abuseipdb[abuseipdb_apikey=${config.age.secrets.abuseipdb.path}, abuseipdb_category='18,22', abuseipdb_comment='Fail2Ban SSH Brute Force']"

     

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               ];

     

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             };

     

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             # Caddy HTTP/HTTPS protection - monitor for repeated 4xx/5xx errors

     

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             caddy-http = {

     

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               enabled = true;

     

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               port = "http,https";

     

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               filter = "caddy-http";

     

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               logpath = "/var/log/caddy/access.log";

     

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               backend = "auto";

     

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               maxretry = 10;

     

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               findtime = "600";

     

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               bantime = "3600";

     

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               action = [

     

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                 "iptables-multiport[name=Caddy, port='http,https']"

     

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                 "abuseipdb[abuseipdb_apikey=${config.age.secrets.abuseipdb.path}, abuseipdb_category='21', abuseipdb_comment='Fail2Ban Caddy Abuse']"

     

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               ];

     

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             };

     

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             # Rate-based protection - ban on excessive requests

     

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             caddy-ratelimit = {

     

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               enabled = true;

     

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               port = "http,https";

     

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               filter = "caddy-ratelimit";

     

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               logpath = "/var/log/caddy/access.log";

     

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               backend = "auto";

     

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               maxretry = 50;

     

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               findtime = "60";

     

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               bantime = "1800";

     

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               action = [

     

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                 "iptables-multiport[name=Caddy-RateLimit, port='http,https']"

     

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                 "abuseipdb[abuseipdb_apikey=${config.age.secrets.abuseipdb.path}, abuseipdb_category='21', abuseipdb_comment='Fail2Ban Rate Limiting']"

     

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               ];

     

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             };

     

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           };

     

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         };

     

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         # Custom filters for Fail2Ban

     

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         environment.etc = {

     

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           # Caddy HTTP error monitoring filter

     

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           "fail2ban/filter.d/caddy-http.conf".text = ''

     

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             [Definition]

     

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             failregex = ^<HOST> -.*" (?:400|401|403|404|405|429|500|502|503|504) .*$

     

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             ignoreregex =

     

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           '';

     

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           # Caddy rate limiting filter - detects repeated requests within short timeframe

     

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           "fail2ban/filter.d/caddy-ratelimit.conf".text = ''

     

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             [Definition]

     

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             failregex = ^<HOST> -.*" \d{3} .*$

     

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             ignoreregex =

     

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           '';

     

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           # AbuseIPDB action for reporting IPs

     

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           # The API key is passed via the abuseipdb_apikey parameter which should be

     

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           # set to the path of the decrypted secret file (e.g., /run/agenix/abuseipdb)

     

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           "fail2ban/action.d/abuseipdb.conf".text = ''

     

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             [Definition]

     

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             actionstart =

     

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             actionstop =

     

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             actioncheck =

     

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             # Report IP to AbuseIPDB

     

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             # Reads the API key from the file specified in the abuseipdb_apikey parameter

     

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             actionban = /run/current-system/sw/bin/curl -s -X POST https://api.abuseipdb.com/api/v2/report \

     

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               -H "Key: $(cat <abuseipdb_apikey>)" \

     

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               -H "Accept: application/json" \

     

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               -d "ip=<ip>&category=<abuseipdb_category>&comment=<abuseipdb_comment>" \

     

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               -o /dev/null

     

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             # No action to unban - AbuseIPDB reports are permanent

     

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             actionunban =

     

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             [Init]

     

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             # Default path - will be overridden by jail configuration

     

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             abuseipdb_apikey = /run/agenix/abuseipdb

     

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             abuseipdb_category = 18

     

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             abuseipdb_comment = Fail2Ban Report

     

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           '';

     

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         };

     

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       }