From 8906e6c7662eb9ae2e3ef9e977dc20dc3b3d1005 Mon Sep 17 00:00:00 2001 From: Gonne Date: Mon, 5 Feb 2024 21:36:51 +0100 Subject: [PATCH 1/5] Setze Mailman-Maschine auf --- nixos/machines/lobon/configuration.nix | 21 ++++++ .../machines/lobon/hardware-configuration.nix | 30 +++++++++ nixos/modules/mailman.nix | 67 +++++++++++++++++++ 3 files changed, 118 insertions(+) create mode 100644 nixos/machines/lobon/configuration.nix create mode 100644 nixos/machines/lobon/hardware-configuration.nix create mode 100644 nixos/modules/mailman.nix diff --git a/nixos/machines/lobon/configuration.nix b/nixos/machines/lobon/configuration.nix new file mode 100644 index 0000000..553bfe4 --- /dev/null +++ b/nixos/machines/lobon/configuration.nix @@ -0,0 +1,21 @@ +{ + imports = [ + ./hardware-configuration.nix + ../../modules/mailman.nix + ../../roles + ../../roles/vm.nix + ../../modules/vmNetwork.nix + ]; + + # System configuration here + + services.mathebau-mailman = { + enable = true; + hostName = "lists.mathebau.de"; + siteOwner = "root@mathebau.de"; + }; + + networking.hostName = "lobon"; + vmNetwork.ipv4 = "192.168.0.22"; + system.stateVersion = "23.11"; +} diff --git a/nixos/machines/lobon/hardware-configuration.nix b/nixos/machines/lobon/hardware-configuration.nix new file mode 100644 index 0000000..ce7112d --- /dev/null +++ b/nixos/machines/lobon/hardware-configuration.nix @@ -0,0 +1,30 @@ +{ + lib, + pkgs, + ... +}: { + imports = []; + + fileSystems."/" = { + device = "root"; + fsType = "tmpfs"; + options = ["size=1G" "mode=755"]; + }; + fileSystems."/persist" = { + device = "/dev/disk/by-label/nixos"; + fsType = "btrfs"; + options = ["subvol=persist"]; + neededForBoot = true; + }; + fileSystems."/boot" = { + device = "/dev/disk/by-label/boot"; + fsType = "ext4"; + }; + fileSystems."/nix" = { + device = "/dev/disk/by-label/nixos"; + fsType = "btrfs"; + options = ["subvol=nix"]; + }; + + nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux"; +} diff --git a/nixos/modules/mailman.nix b/nixos/modules/mailman.nix new file mode 100644 index 0000000..e4265a9 --- /dev/null +++ b/nixos/modules/mailman.nix @@ -0,0 +1,67 @@ +# Adapted and simplified from https://nixos.wiki/wiki/Mailman +{ + config, + lib, + ... +}: let + inherit + (lib) + mkIf + mkEnableOption + mkOption + ; + inherit (lib.types) nonEmptyStr; + cfg = config.services.mathebau-mailman; +in { + options.services.mathebau-mailman = { + enable = mkEnableOption "mathebau mailman service"; + hostName = mkOption { + type = nonEmptyStr; + }; + siteOwner = mkOption { + type = nonEmptyStr; + }; + }; + + config = mkIf cfg.enable { + services = { + postfix = { + enable = true; + relayDomains = ["hash:/var/lib/mailman/data/postfix_domains"]; + sslCert = config.security.acme.certs.${cfg.hostName}.directory + "/full.pem"; + sslKey = config.security.acme.certs.${cfg.hostName}.directory + "/key.pem"; + config = { + transport_maps = ["hash:/var/lib/mailman/data/postfix_lmtp"]; + local_recipient_maps = ["hash:/var/lib/mailman/data/postfix_lmtp"]; + proxy_interfaces = "130.83.2.184"; + smtputf8_enable = "no"; # HRZ does not know SMTPUTF8 + }; + relayHost = "mailout.hrz.tu-darmstadt.de"; # Relay to HRZ + }; + mailman = { + enable = true; + inherit (cfg) siteOwner; + hyperkitty.enable = true; + webHosts = [cfg.hostName]; + serve.enable = true; # + }; + nginx.virtualHosts.${cfg.hostName} = { + enableACME = true; + forceSSL = false; + }; + }; + + environment.persistence.${config.impermanence.name} = { + directories = [ + "/var/lib/acme" # Persist TLS keys and account + "/var/lib/mailman" + "/var/lib/mailman-web" + ]; + }; + + security.acme.defaults.email = cfg.siteOwner; + security.acme.acceptTerms = true; + + networking.firewall.allowedTCPPorts = [25 80 443]; + }; +} -- 2.39.5 From 67083126be97bdc980d38e7251437ddc44a3c253 Mon Sep 17 00:00:00 2001 From: Gonne Date: Sun, 31 Mar 2024 16:26:11 +0200 Subject: [PATCH 2/5] Add pushing to hrz allowlist --- .sops.yaml | 7 ++++ nixos/machines/lobon/allowlistPass.yaml | 39 ++++++++++++++++++++++ nixos/modules/mailman.nix | 44 +++++++++++++++++++++++-- 3 files changed, 87 insertions(+), 3 deletions(-) create mode 100644 nixos/machines/lobon/allowlistPass.yaml diff --git a/.sops.yaml b/.sops.yaml index 6f01614..bc5cfc6 100644 --- a/.sops.yaml +++ b/.sops.yaml @@ -4,6 +4,7 @@ keys: - &nyarlathotep age1s99d0vlj5qlm287n98jratql5fypvjrxxal0k5jl2aw9dcc8kyvqw5yyt4 - &bragi age1lqvgpmlemyg9095ujck64u59ma29656zs7a4yxgz4s6u5cld2ccss69jwe + - &lobon age12nz7dtc0m5wasxm4r9crtkgwnzvauyfp0xh0n8z8jld0arn9ea9qe0agvn creation_rules: - path_regex: nixos/machines/nyarlathotep/.* @@ -18,6 +19,12 @@ creation_rules: - *nerf - *gonne - *bragi + - path_regex: nixos/machines/lobon/.* + key_groups: + - age: + - *nerf + - *gonne + - *lobon # this is the catchall clause if nothing above machtes. Encrypt to users but not # to machines - key_groups: diff --git a/nixos/machines/lobon/allowlistPass.yaml b/nixos/machines/lobon/allowlistPass.yaml new file mode 100644 index 0000000..c8d4d98 --- /dev/null +++ b/nixos/machines/lobon/allowlistPass.yaml @@ -0,0 +1,39 @@ +allowlistPass: ENC[AES256_GCM,data:bb9jXSvWeDnZqqiY/IarwA==,iv:qeFAYvXYdh2uEleg8kpCd77u4PTbwM8ydEkbMhyPz1I=,tag:1/eysyZb2mJ0mYHXIrpihw==,type:str] +sops: + kms: [] + gcp_kms: [] + azure_kv: [] + hc_vault: [] + age: + - recipient: age1rasjnr2tlv9y70sj0z0hwpgpxdc974wzg5umtx2pnc6z0p05u3js6r8sln + enc: | + -----BEGIN AGE ENCRYPTED FILE----- + YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSAySVhjV0xXdGE2am85RVJh + NXJLRy92blkzeENuWHh3QSsxNHBXcUpibGxnCnVHUEVoYVgxbk5WSmxQRXNzMC9i + Y1g4MUFrNEVjVjJWM0xhU0JzTzNZTk0KLS0tIFIrdmhrbXFHb2VaQ1p2dDJMMmlR + Um5CcGlZanBBRzJKOVNZeWVPTmsrcVUK905uViHD7uZMVQHPfFraIHXYTHaT+ERl + ZvyRDdjjRCyxu0qcIpYVpPAmfGCo0++bXSRUX8rCp48YN20MbPNjgA== + -----END AGE ENCRYPTED FILE----- + - recipient: age1xv5rfxkxg9jyqx5jg2j82cxv7w7ep4a3795p4yl5fuqf38f3m3eqfnefju + enc: | + -----BEGIN AGE ENCRYPTED FILE----- + YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBLNkNpN2RlcHBuOUxoYmkx + QzdOM1E0cFBSc1I0NzVRbmhiUXhjM3dQOWhnCmlOQzJ3b2Q5NFJkb2haMDNGSFBv + SkdySWtRUzhic1FNeXhiUFBPRVNoWmcKLS0tIGNaVW5xUmxWOEtXVkRqVEJJSEVv + NFBWREFQbnFXclhiNW51M0ZsOEMxdnMKdOPVRbD42q7MRw1CX1M30Xdil7VFLDVD + G8j4sjxlDkcwQK/3WjZdBLXAzJcrvAp0okGzw8lymC812CXTSEfmxw== + -----END AGE ENCRYPTED FILE----- + - recipient: age12nz7dtc0m5wasxm4r9crtkgwnzvauyfp0xh0n8z8jld0arn9ea9qe0agvn + enc: | + -----BEGIN AGE ENCRYPTED FILE----- + YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBKVVN2THloaU1pVnhtWDhm + TWpPaHNLSXlud0RLU3ovS0s4REtUTzQwMHhZClF5OFZQVHB2VG9BeThSYzVSMUFJ + VDNkT0Y1Y3RUemkwSmxlM0drUlNDR1UKLS0tIDYrcVhXMWJxR2dhcXhjdTQ3MjV1 + Y3lWbHdLOGRGamhRY0xoRnVJczc2aFUKWWAflRwoszNw5bEDTSaVI65FtQve/HrC + uY1JvYwXLq4m4hu76dyrplDpzb8ant/YAUXpG6F4U7nn9GiLBaoyUQ== + -----END AGE ENCRYPTED FILE----- + lastmodified: "2024-03-31T14:34:54Z" + mac: ENC[AES256_GCM,data:sjWiO96NcFUT4L9mdBuQwt6Zl5cS16o73zes30SYJxzM1R3ZBIg9oOmhXxY9BC3yKjEb6bVuemj/bnnopSR/m3RPH7xfaYCBfz97Zgc4SGtoqLIra5OUCRpWnKSsD6Nf09Qss5Pbla9EIrI0kQt7fpf4iKLF7VJwrQryslnvfcM=,iv:ilnbLK6sttweEyqszVHxVnjbTq8jF5ZTO24OEIPMprE=,tag:3XgAlXMl/RIaUfkVwHJeBQ==,type:str] + pgp: [] + unencrypted_suffix: _unencrypted + version: 3.8.1 diff --git a/nixos/modules/mailman.nix b/nixos/modules/mailman.nix index e4265a9..9f64466 100644 --- a/nixos/modules/mailman.nix +++ b/nixos/modules/mailman.nix @@ -2,6 +2,7 @@ { config, lib, + pkgs, ... }: let inherit @@ -36,7 +37,7 @@ in { proxy_interfaces = "130.83.2.184"; smtputf8_enable = "no"; # HRZ does not know SMTPUTF8 }; - relayHost = "mailout.hrz.tu-darmstadt.de"; # Relay to HRZ + relayHost = "mailout.hrz.tu-darmstadt.de"; # Relay to HRZ (see https://www.hrz.tu-darmstadt.de/services/it_services/email_infrastruktur/index.de.jsp) }; mailman = { enable = true; @@ -44,10 +45,12 @@ in { hyperkitty.enable = true; webHosts = [cfg.hostName]; serve.enable = true; # + # Don't include confirmation tokens in reply addresses, because we would need to send them to HRZ otherwise. + settings.mta.verp_confirmations = "no"; }; nginx.virtualHosts.${cfg.hostName} = { - enableACME = true; - forceSSL = false; + enableACME = true; # Get certificates (primarily for postfix) + forceSSL = false; # Don't use HTTPS behind the proxy }; }; @@ -63,5 +66,40 @@ in { security.acme.acceptTerms = true; networking.firewall.allowedTCPPorts = [25 80 443]; + + # Update HRZ allowlist + # For account details see https://www-cgi.hrz.tu-darmstadt.de/mail/ + # will stop working if no valid TUIDs are associated to our domain. + systemd.timers."mailAllowlist" = { + wantedBy = ["timers.target"]; + timerConfig = { + OnBootSec = "5m"; # Run every 5 minutes + OnUnitActiveSec = "5m"; + RandomizedDelaySec = "2m"; # prevent overload on regular intervals + Unit = "mailAllowlist.service"; + }; + }; + systemd.services."mailAllowlist" = { + description = "Allowlist update: Post the mail addresses used by mailman to the HRZ allowllist"; + script = '' + # Get the mail addresses' local-part + cut -d '@' -f 1 /var/lib/mailman/data/postfix_lmtp | grep -v '#' | grep "\S" > /tmp/addresses + # Post local-parts to HRZ + ${pkgs.curl}/bin/curl https://www-cgi.hrz.tu-darmstadt.de/mail/whitelist-update.php -F emaildomain=${cfg.hostName} -F password=$(cat /run/secrets/allowlistPass) -F emailliste=@/tmp/addresses -F meldungen=voll + # Cleanup + rm /tmp/addresses + ''; + serviceConfig = { + Type = "oneshot"; + User = "mailman"; + PrivateTmp = true; + }; + }; + sops.secrets.allowlistPass = { + sopsFile = ../machines/lobon/allowlistPass.yaml; + owner = "mailman"; + group = "mailman"; + mode = "0400"; + }; }; } -- 2.39.5 From c5f641cabfd8217fd1255d5eff578da8acfddeca Mon Sep 17 00:00:00 2001 From: Gonne Date: Sun, 31 Mar 2024 20:28:40 +0200 Subject: [PATCH 3/5] Mailman backups --- nixos/machines/lobon/backupKey.yaml | 39 ++++++++++++++++++++++++++ nixos/machines/lobon/configuration.nix | 15 ++++++++++ nixos/modules/borgbackup.nix | 7 +++++ nixos/modules/mailman.nix | 27 ++++++++++++++---- 4 files changed, 82 insertions(+), 6 deletions(-) create mode 100644 nixos/machines/lobon/backupKey.yaml diff --git a/nixos/machines/lobon/backupKey.yaml b/nixos/machines/lobon/backupKey.yaml new file mode 100644 index 0000000..3095894 --- /dev/null +++ b/nixos/machines/lobon/backupKey.yaml @@ -0,0 +1,39 @@ +backupKey: ENC[AES256_GCM,data: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,iv:ghvgkC6qFO/0tvsc7igCoZy7am8eNsd21WYCSAKiZDs=,tag:MFnk/Nnw+cloN+x7sd4LLg==,type:str] +sops: + kms: [] + gcp_kms: [] + azure_kv: [] + hc_vault: [] + age: + - recipient: age1rasjnr2tlv9y70sj0z0hwpgpxdc974wzg5umtx2pnc6z0p05u3js6r8sln + enc: | + -----BEGIN AGE ENCRYPTED FILE----- + YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBaNVExTHQrY2h1M3RZOEdU + Wm5kdDBHZ1NmZGpQU0VOYWtjOTdBVURQZkJnCmZzWTEvSWxvMFk4NlFOVnBDbm9q + Tncva0VyMGVDL29ZZ0YxeGE3RFBUS3cKLS0tIDluK05NMUNNM3pEUmlCNE9BV3lT + L0dPYTBwbjJzUmJnYktiM2JBME5LM3cKvPwth4DxQgFYhvr9vJLfeaiNc+UfAo4c + RdXPLkwtq3vksrU1IR54tHcUJ0yZiZ1HxxGp3PCPaXXJiUykllnJPw== + -----END AGE ENCRYPTED FILE----- + - recipient: age1epz92k2rkp43hkrg3u0jgkzhnkwx8y43kag7rvfzwl9wcddelvusyetxl7 + enc: | + -----BEGIN AGE ENCRYPTED FILE----- + YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBRdFV0OVA5VTBuOVhsL3lp + MFpDN2RHVDExck5vcWpDNDNPM2k3S1FqQUFFCjNreXdSbDFXOHJ4b21mNGlZb0xQ + YUh0WVNGN2o1aFVaaGpxbmk4aUQ4ZTAKLS0tIHhtci84Zk1zZlBOOHk4a3VKUlM1 + MXNZbWdpVEJiTTlIRERLYzBlNWxBMlUK4Z8JLlN5FOegfdg5njhHjbCwAm/f+kJS + buOHGWzWirW0ZibOP+fikzJwdIzIsX8v8tGaV89nQwf0hrxK0748Hg== + -----END AGE ENCRYPTED FILE----- + - recipient: age12nz7dtc0m5wasxm4r9crtkgwnzvauyfp0xh0n8z8jld0arn9ea9qe0agvn + enc: | + -----BEGIN AGE ENCRYPTED FILE----- + YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBZa2pUZlZsVmhPU242d0Nj + bi9BSlJBU1Q1cFU4ZjA4NnlJNmdwaVFBc2xNCjJlSG5UaDFnSzFHZ01RVVNjOHY5 + L1JVUit6SThvbGRIU0loNmtZanllNXcKLS0tIFhMR1pxRmlGQWFEQURiRFJoMWJZ + dlExV2xTVWR6bWI3VCtSdU81SmtqYncKLFQczlIj89vzlfgE33w6ktotYFdxaWr9 + YyewbY8qZmOUGQ4xKlZmhojeMh/FEH8dGNEf1AxnKbuQdnW6lqGR/w== + -----END AGE ENCRYPTED FILE----- + lastmodified: "2024-03-31T16:01:00Z" + mac: ENC[AES256_GCM,data:AawTzIXyX+3FyFpw8pXFeVJJtXN7ZpTFnUqhedC2vcbbNUzMMt1X0SaxtNNJ5chZI/tYHn59FT6zznl1eO4Xn29Zc2Up4dkT1BE4yqkEG0hiCFXrXMz/PaHfROzBhIWCVyF4fYj6MZKg1iBBxhWRqhJlQ1q4UVkoaITRUKpFJgs=,iv:3lTPOQ8VjmP3WNGbFK2yLU4Ks1KviNS/l7TH4SnvSUs=,tag:KUbAU6+76/Uxj2Wn9EnqnA==,type:str] + pgp: [] + unencrypted_suffix: _unencrypted + version: 3.8.1 diff --git a/nixos/machines/lobon/configuration.nix b/nixos/machines/lobon/configuration.nix index 553bfe4..506d637 100644 --- a/nixos/machines/lobon/configuration.nix +++ b/nixos/machines/lobon/configuration.nix @@ -18,4 +18,19 @@ networking.hostName = "lobon"; vmNetwork.ipv4 = "192.168.0.22"; system.stateVersion = "23.11"; + + sops.secrets = { + allowlistPass = { + sopsFile = ./allowlistPass.yaml; + owner = "mailman"; + group = "mailman"; + mode = "0400"; + }; + backupKey = { + sopsFile = ./backupKey.yaml; + owner = "root"; + group = "root"; + mode = "0400"; + }; + }; } diff --git a/nixos/modules/borgbackup.nix b/nixos/modules/borgbackup.nix index 784981c..08724cc 100644 --- a/nixos/modules/borgbackup.nix +++ b/nixos/modules/borgbackup.nix @@ -83,6 +83,13 @@ in { path = "/var/lib/backups/ithaqua"; allowSubRepos = true; }; + lobon = { + authorizedKeysAppendOnly = [ + "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICEptjf1UWRlo6DG9alAIRwkSDUAVHwDKkHC6/DeYKzi Lobon Backup" + ]; + path = "/var/lib/backups/lobon"; + allowSubRepos = true; + }; sanctamariamaterdei = { authorizedKeysAppendOnly = [ "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIH9Le5OI4ympQ0mQKYHmxgxGF598rzpD5VVpWK1mGfd8 Sanctamariamaterdei Backupsystem" diff --git a/nixos/modules/mailman.nix b/nixos/modules/mailman.nix index 9f64466..d106c0f 100644 --- a/nixos/modules/mailman.nix +++ b/nixos/modules/mailman.nix @@ -37,7 +37,7 @@ in { proxy_interfaces = "130.83.2.184"; smtputf8_enable = "no"; # HRZ does not know SMTPUTF8 }; - relayHost = "mailout.hrz.tu-darmstadt.de"; # Relay to HRZ (see https://www.hrz.tu-darmstadt.de/services/it_services/email_infrastruktur/index.de.jsp) + relayHost = "192.168.0.24"; # Relay to eihort which relays to HRZ (see https://www.hrz.tu-darmstadt.de/services/it_services/email_infrastruktur/index.de.jsp) }; mailman = { enable = true; @@ -60,6 +60,7 @@ in { "/var/lib/mailman" "/var/lib/mailman-web" ]; + files = ["/root/.ssh/known_hosts"]; # for the backup server bragi }; security.acme.defaults.email = cfg.siteOwner; @@ -95,11 +96,25 @@ in { PrivateTmp = true; }; }; - sops.secrets.allowlistPass = { - sopsFile = ../machines/lobon/allowlistPass.yaml; - owner = "mailman"; - group = "mailman"; - mode = "0400"; + + # Backups + services.borgbackup.jobs.mailman = { + paths = [ + "/var/lib/mailman/data" + "/var/lib/mailman-web" + ]; + encryption.mode = "none"; # Otherwise the key is next to the backup or we have human interaction. + environment = { + BORG_RSH = "ssh -i /run/secrets/backupKey"; + # “Borg ensures that backups are not created on random drives that ‘just happen’ to contain a Borg repository.” + # https://borgbackup.readthedocs.io/en/stable/deployment/automated-local.html + # We don't want this in order to not need to persist borg cache and simplify new deployments. + BORG_UNKNOWN_UNENCRYPTED_REPO_ACCESS_IS_OK = "yes"; + }; + repo = "borg@192.168.1.11:lobon"; # TODO for https://gitea.mathebau.de/Fachschaft/nixConfig/issues/33 + startAt = "daily"; + user = "root"; + group = "root"; }; }; } -- 2.39.5 From 081b9a9d3484f6b143e0e8b353fb31185cebd51f Mon Sep 17 00:00:00 2001 From: Gonne Date: Thu, 4 Apr 2024 17:13:12 +0200 Subject: [PATCH 4/5] Restrict HRZ allowlist update service privileges --- nixos/modules/mailman.nix | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/nixos/modules/mailman.nix b/nixos/modules/mailman.nix index d106c0f..597a2f1 100644 --- a/nixos/modules/mailman.nix +++ b/nixos/modules/mailman.nix @@ -93,7 +93,25 @@ in { serviceConfig = { Type = "oneshot"; User = "mailman"; + NoNewPrivileges = true; + # See https://www.man7.org/linux/man-pages/man5/systemd.exec.5.html PrivateTmp = true; + ProtectHome = true; + ReadOnlyPaths = "/"; + ReadWritePaths = "/tmp"; + InaccessiblePaths = "-/lost+found"; + PrivateDevices = true; + PrivateUsers = true; + ProtectHostname = true; + ProtectClock = true; + ProtectKernelTunables = true; + ProtectKernelModules = true; + ProtectKernelLogs = true; + ProtectControlGroups = true; + LockPersonality = true; + MemoryDenyWriteExecute = true; + RestrictRealtime = true; + RestrictSUIDSGID = true; }; }; -- 2.39.5 From 101638c4135eb9e41bbc867dcc7d0097ce986808 Mon Sep 17 00:00:00 2001 From: Gonne Date: Sat, 12 Oct 2024 13:56:34 +0200 Subject: [PATCH 5/5] Disable TLS behind proxies and relays --- nixos/modules/mailman.nix | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) diff --git a/nixos/modules/mailman.nix b/nixos/modules/mailman.nix index 597a2f1..5cfa63d 100644 --- a/nixos/modules/mailman.nix +++ b/nixos/modules/mailman.nix @@ -29,8 +29,6 @@ in { postfix = { enable = true; relayDomains = ["hash:/var/lib/mailman/data/postfix_domains"]; - sslCert = config.security.acme.certs.${cfg.hostName}.directory + "/full.pem"; - sslKey = config.security.acme.certs.${cfg.hostName}.directory + "/key.pem"; config = { transport_maps = ["hash:/var/lib/mailman/data/postfix_lmtp"]; local_recipient_maps = ["hash:/var/lib/mailman/data/postfix_lmtp"]; @@ -48,25 +46,17 @@ in { # Don't include confirmation tokens in reply addresses, because we would need to send them to HRZ otherwise. settings.mta.verp_confirmations = "no"; }; - nginx.virtualHosts.${cfg.hostName} = { - enableACME = true; # Get certificates (primarily for postfix) - forceSSL = false; # Don't use HTTPS behind the proxy - }; }; environment.persistence.${config.impermanence.name} = { directories = [ - "/var/lib/acme" # Persist TLS keys and account "/var/lib/mailman" "/var/lib/mailman-web" ]; files = ["/root/.ssh/known_hosts"]; # for the backup server bragi }; - security.acme.defaults.email = cfg.siteOwner; - security.acme.acceptTerms = true; - - networking.firewall.allowedTCPPorts = [25 80 443]; + networking.firewall.allowedTCPPorts = [25 80]; # Update HRZ allowlist # For account details see https://www-cgi.hrz.tu-darmstadt.de/mail/ -- 2.39.5