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-rw-r--r--modules/base-cac-CentOS-7-64bit.nix27
-rw-r--r--modules/exim-cd.nix473
-rw-r--r--modules/iptables-cd.nix75
-rw-r--r--modules/networking-cd.nix14
4 files changed, 589 insertions, 0 deletions
diff --git a/modules/base-cac-CentOS-7-64bit.nix b/modules/base-cac-CentOS-7-64bit.nix
new file mode 100644
index 000000000..42ab481b3
--- /dev/null
+++ b/modules/base-cac-CentOS-7-64bit.nix
@@ -0,0 +1,27 @@
+{ config, pkgs, ... }:
+
+{
+ boot.loader.grub.device = "/dev/sda";
+ boot.loader.grub.enable = true;
+ boot.loader.grub.version = 2;
+
+ boot.initrd.availableKernelModules = [
+ "ata_piix"
+ "vmw_pvscsi"
+ ];
+
+ fileSystems."/" = {
+ device = "/dev/centos/root";
+ fsType = "xfs";
+ };
+
+ fileSystems."/boot" = {
+ device = "/dev/sda1";
+ fsType = "xfs";
+ };
+
+ swapDevices = [
+ { device = "/dev/centos/swap"; }
+ ];
+}
+
diff --git a/modules/exim-cd.nix b/modules/exim-cd.nix
new file mode 100644
index 000000000..b28f39437
--- /dev/null
+++ b/modules/exim-cd.nix
@@ -0,0 +1,473 @@
+{ config, pkgs, ... }:
+
+let
+ inherit (builtins) toFile;
+ inherit (pkgs.lib.attrsets) mapAttrs;
+ inherit (pkgs.lib.strings) concatMapStringsSep;
+in
+
+{
+ services.exim =
+ let
+ retiolumHostname = "${config.networking.hostName}.retiolum";
+
+ internet-aliases = [
+ { from = "tomislav@viljetic.de"; to = "tv@wu.retiolum"; }
+
+ # (mindestens) lisp-stammtisch und elli haben die:
+ { from = "tv@viljetic.de"; to = "tv@wu.retiolum"; }
+
+ { from = "tv@destroy.dyn.shackspace.de"; to = "tv@wu.retiolum"; }
+
+ { from = "mirko@viljetic.de"; to = "mv@cd.retiolum"; }
+
+ # TODO killme (wo wird die benutzt?)
+ { from = "tv@cd.retiolum"; to = "tv@wu.retiolum"; }
+
+ { from = "postmaster@krebsco.de"; to = "tv@wu.retiolum"; }
+ ];
+
+ system-aliases = [
+ { from = "mailer-daemon"; to = "postmaster"; }
+ { from = "postmaster"; to = "root"; }
+ { from = "nobody"; to = "root"; }
+ { from = "hostmaster"; to = "root"; }
+ { from = "usenet"; to = "root"; }
+ { from = "news"; to = "root"; }
+ { from = "webmaster"; to = "root"; }
+ { from = "www"; to = "root"; }
+ { from = "ftp"; to = "root"; }
+ { from = "abuse"; to = "root"; }
+ { from = "noc"; to = "root"; }
+ { from = "security"; to = "root"; }
+ { from = "root"; to = "tv"; }
+ ];
+
+ to-lsearch = concatMapStringsSep "\n" ({ from, to }: "${from}: ${to}");
+ lsearch =
+ mapAttrs (name: set: toFile name (to-lsearch set)) {
+ inherit internet-aliases;
+ inherit system-aliases;
+ };
+ in
+ {
+ enable = true;
+ config =
+ ''
+ primary_hostname = ${retiolumHostname}
+
+ # HOST_REDIR contains the real destinations for "local_domains".
+ #HOST_REDIR = /etc/exim4/host_redirect
+
+
+ # Domains not listed in local_domains need to be deliverable remotely.
+ # XXX We abuse local_domains to mean "domains, we're the gateway for".
+ domainlist local_domains = @ : localhost
+ #: viljetic.de : SHACK_REDIR_HOSTNAME
+ domainlist relay_to_domains =
+ hostlist relay_from_hosts = <; 127.0.0.1 ; ::1 ; 10.243.13.37
+
+ acl_smtp_rcpt = acl_check_rcpt
+ acl_smtp_data = acl_check_data
+
+ # av_scanner = clamd:/tmp/clamd
+ # spamd_address = 127.0.0.1 783
+
+ # tls_advertise_hosts = *
+ # tls_certificate = /etc/ssl/exim.crt
+ # tls_privatekey = /etc/ssl/exim.pem
+ # (debian) tls_verify_certificates (to check client certs)
+
+ # daemon_smtp_ports = 25 : 465 : 587
+ # tls_on_connect_ports = 465
+
+ # qualify_domain defaults to primary_hostname
+ # qualify_recipient defaults to qualify_domain
+
+ # allow_domain_literals
+
+ never_users = root
+
+ host_lookup = *
+
+ # ident callbacks for all incoming SMTP calls
+ rfc1413_hosts = *
+ rfc1413_query_timeout = 5s
+
+ # sender_unqualified_hosts =
+ # recipient_unqualified_hosts =
+
+ # percent_hack_domains =
+
+ # arch & debian
+ #ignore_bounce_errors_after = 2d
+ #timeout_frozen_after = 7d
+ # debian
+ #smtp_banner = $smtp_active_hostname ESMTP Exim $version_number $tod_full
+ #freeze_tell = postmaster
+ #trusted_users = uucp
+ # arch
+ #split_spool_directory = true
+
+ log_selector = -queue_run +address_rewrite +all_parents +queue_time
+ log_file_path = syslog
+ syslog_timestamp = false
+ syslog_duplication = false
+
+ begin acl
+
+ acl_check_rcpt:
+ # Accept if the source is local SMTP (i.e. not over TCP/IP).
+ # We do this by testing for an empty sending host field.
+ accept hosts = :
+ # arch & debian:
+ control = dkim_disable_verify
+
+ deny message = Restricted characters in address
+ domains = +local_domains
+ local_parts = ^[.] : ^.*[@%!/|]
+
+ deny message = Restricted characters in address
+ domains = !+local_domains
+ local_parts = ^[./|] : ^.*[@%!] : ^.*/\\.\\./
+
+ accept local_parts = postmaster
+ domains = +local_domains
+
+ ## feature RETIOLUM_MAIL
+ #accept
+ # hosts = *.retiolum
+ # domains = *.retiolum
+ # control = dkim_disable_verify
+
+ #require verify = sender
+
+ accept hosts = +relay_from_hosts
+ control = submission
+ # debian: control = submission/sender_retain
+ # arch & debian:
+ control = dkim_disable_verify
+
+ accept authenticated = *
+ control = submission
+ control = dkim_disable_verify
+
+ accept message = relay not permitted 2
+ recipients = lsearch;${lsearch.internet-aliases}
+
+ require message = relay not permitted
+ domains = +local_domains : +relay_to_domains
+
+ require
+ message = unknown user
+ verify = recipient/callout
+
+ # deny message = rejected because $sender_host_address is in a black list at $dnslist_domain\n$dnslist_text
+ # dnslists = black.list.example
+ #
+ # warn dnslists = black.list.example
+ # add_header = X-Warning: $sender_host_address is in a black list at $dnslist_domain
+ # log_message = found in $dnslist_domain
+
+ # Client SMTP Authorization (csa) checks on the sending host.
+ # Such checks do DNS lookups for special SRV records.
+ # require verify = csa
+
+ accept
+
+
+ acl_check_data:
+ # see av_scanner
+ #deny malware = *
+ # message = This message contains a virus ($malware_name).
+
+ # Add headers to a message if it is judged to be spam. Before enabling this,
+ # you must install SpamAssassin. You may also need to set the spamd_address
+ # option above.
+ #
+ # warn spam = nobody
+ # add_header = X-Spam_score: $spam_score\n\
+ # X-Spam_score_int: $spam_score_int\n\
+ # X-Spam_bar: $spam_bar\n\
+ # X-Spam_report: $spam_report
+
+ # feature HELO_REWRITE
+ # XXX note that the public ip (162.219.5.183) resolves to viljetic.de
+ warn
+ sender_domains = viljetic.de : shackspace.de
+ set acl_m_special_dom = $sender_address_domain
+
+ accept
+
+
+ begin routers
+
+ # feature RETIOLUM_MAIL
+ retiolum:
+ debug_print = "R: retiolum for $local_part@$domain"
+ driver = manualroute
+ domains = ! ${retiolumHostname} : *.retiolum
+ transport = retiolum_smtp
+ route_list = ^.* $0 byname
+ no_more
+
+ internet_aliases:
+ debug_print = "R: internet_aliases for $local_part@$domain"
+ driver = redirect
+ data = ''${lookup{$local_part@$domain}lsearch{${lsearch.internet-aliases}}}
+
+ dnslookup:
+ debug_print = "R: dnslookup for $local_part@$domain"
+ driver = dnslookup
+ domains = ! +local_domains
+ transport = remote_smtp
+ ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8
+ # if ipv6-enabled then instead use:
+ # ignore_target_hosts = <; 0.0.0.0 ; 127.0.0.0/8 ; ::1
+
+ # (debian) same_domain_copy_routing = yes
+ # (debian) ignore private rfc1918 and APIPA addresses
+ # (debian) ignore_target_hosts = 0.0.0.0 : 127.0.0.0/8 : 192.168.0.0/16 :\
+ # 172.16.0.0/12 : 10.0.0.0/8 : 169.254.0.0/16 :\
+ # 255.255.255.255
+
+ # Fail and bounce if the router does not find the domain in the DNS.
+ # I.e. no more routers are tried.
+ # There are a few cases where a dnslookup router will decline to accept an
+ # address; if such a router is expected to handle "all remaining non-local
+ # domains", then it is important to set no_more.
+ no_more
+
+ # XXX this is only used because these "well known aliases" goto tv@cd.retiolum
+ # TODO bounce everything, there is no @cd.retiolum
+ system_aliases:
+ debug_print = "R: system_aliases for $local_part@$domain"
+ driver = redirect
+ data = ''${lookup{$local_part}lsearch{${lsearch.system-aliases}}}
+
+ # TODO this is only b/c mv here... send mv's mails somewhere else...
+ local_user:
+ debug_print = "R: local_user for $local_part@$domain"
+ driver = accept
+ check_local_user
+ # local_part_suffix = +* : -*
+ # local_part_suffix_optional
+ transport = home_maildir
+ cannot_route_message = Unknown user
+
+ begin transports
+
+ retiolum_smtp:
+ driver = smtp
+ retry_include_ip_address = false
+ # serialize_hosts = TODO-all-slow-hosts
+
+ remote_smtp:
+ driver = smtp
+ # debian has also stuff for tls, headers_rewrite and more here
+
+ # feature HELO_REWRITE
+ # XXX note that the public ip (162.219.5.183) resolves to viljetic.de
+ helo_data = ''${if eq{$acl_m_special_dom}{} \
+ {$primary_hostname} \
+ {$acl_m_special_dom} }
+
+ home_maildir:
+ driver = appendfile
+ maildir_format
+ maildir_use_size_file
+ directory = $home/Maildir
+ directory_mode = 0700
+ delivery_date_add
+ envelope_to_add
+ return_path_add
+
+ begin retry
+ *.retiolum * F,42d,1m
+ * * F,2h,15m; G,16h,1h,1.5; F,4d,6h
+
+ begin rewrite
+ begin authenticators
+ '';
+
+
+ # group = mail
+ # mode = 0660
+
+
+ #address_pipe:
+ # driver = pipe
+ # return_output
+ #
+ #address_file:
+ # driver = appendfile
+ # delivery_date_add
+ # envelope_to_add
+ # return_path_add
+ #
+ #address_reply:
+ # driver = autoreply
+
+
+ #maildrop_pipe:
+ # debug_print = "T: maildrop_pipe for $local_part@$domain"
+ # driver = pipe
+ # path = "/bin:/usr/bin:/usr/local/bin"
+ # command = "/usr/bin/maildrop"
+ # return_path_add
+ # delivery_date_add
+ # envelope_to_add
+
+
+
+
+
+ ##begin retry
+ # Address or Domain Error Retries
+
+ # Our host_redirect destinations might be offline a lot.
+ # TODO define fallback destinations(?)
+ #lsearch;${lsearch.internet-aliases} * F,42d,1m
+
+
+ ## begin rewrite
+
+ # just in case (shackspace.de should already do this)
+ #tv@shackspace.de tv@SHACK_REDIR_HOSTNAME T
+
+
+ ## begin authenticators
+ #PLAIN:
+ # driver = plaintext
+ # server_set_id = $auth2
+ # server_prompts = :
+ # server_condition = Authentication is not yet configured
+ # server_advertise_condition = ''${if def:tls_in_cipher }
+
+ #LOGIN:
+ # driver = plaintext
+ # server_set_id = $auth1
+ # server_prompts = <| Username: | Password:
+ # server_condition = Authentication is not yet configured
+ # server_advertise_condition = ''${if def:tls_in_cipher }
+
+
+
+ };
+
+}
+
+# config = ''
+# primary_hostname = ${retiolumHostname}
+# domainlist local_domains = @ : localhost
+# domainlist relay_to_domains = *.retiolum
+# hostlist relay_from_hosts = <; 127.0.0.1 ; ::1
+#
+# acl_smtp_rcpt = acl_check_rcpt
+# acl_smtp_data = acl_check_data
+#
+# host_lookup = *
+# rfc1413_hosts = *
+# rfc1413_query_timeout = 5s
+#
+# log_file_path = syslog
+# syslog_timestamp = false
+# syslog_duplication = false
+#
+# begin acl
+#
+# acl_check_rcpt:
+# accept hosts = :
+# control = dkim_disable_verify
+#
+# deny message = Restricted characters in address
+# domains = +local_domains
+# local_parts = ^[.] : ^.*[@%!/|]
+#
+# deny message = Restricted characters in address
+# domains = !+local_domains
+# local_parts = ^[./|] : ^.*[@%!] : ^.*/\\.\\./
+#
+# accept local_parts = postmaster
+# domains = +local_domains
+#
+# #accept
+# # hosts = *.retiolum
+# # domains = *.retiolum
+# # control = dkim_disable_verify
+#
+# #require verify = sender
+#
+# accept hosts = +relay_from_hosts
+# control = submission
+# control = dkim_disable_verify
+#
+# accept authenticated = *
+# control = submission
+# control = dkim_disable_verify
+#
+# require message = relay not permitted
+# domains = +local_domains : +relay_to_domains
+#
+# require verify = recipient
+#
+# accept
+#
+#
+# acl_check_data:
+# accept
+#
+#
+# begin routers
+#
+# retiolum:
+# driver = manualroute
+# domains = ! ${retiolumHostname} : *.retiolum
+# transport = remote_smtp
+# route_list = ^.* $0 byname
+# no_more
+#
+# nonlocal:
+# debug_print = "R: nonlocal for $local_part@$domain"
+# driver = redirect
+# domains = ! +local_domains
+# allow_fail
+# data = :fail: Mailing to remote domains not supported
+# no_more
+#
+# local_user:
+# # debug_print = "R: local_user for $local_part@$domain"
+# driver = accept
+# check_local_user
+# # local_part_suffix = +* : -*
+# # local_part_suffix_optional
+# transport = home_maildir
+# cannot_route_message = Unknown user
+#
+#
+# begin transports
+#
+# remote_smtp:
+# driver = smtp
+#
+# home_maildir:
+# driver = appendfile
+# maildir_format
+# directory = $home/Maildir
+# directory_mode = 0700
+# delivery_date_add
+# envelope_to_add
+# return_path_add
+# # group = mail
+# # mode = 0660
+#
+# begin retry
+# *.retiolum * F,42d,1m
+# * * F,2h,15m; G,16h,1h,1.5; F,4d,6h
+#
+# begin rewrite
+#
+# begin authenticators
+# '';
+# };
+#}
diff --git a/modules/iptables-cd.nix b/modules/iptables-cd.nix
new file mode 100644
index 000000000..70736e49d
--- /dev/null
+++ b/modules/iptables-cd.nix
@@ -0,0 +1,75 @@
+{ config, pkgs, ... }:
+
+{
+ #
+ # iptables
+ #
+ networking.firewall.enable = false;
+ system.activationScripts.iptables =
+ let
+ log = false;
+ when = c: f: if c then f else "";
+ in
+ ''
+ ip4tables() { ${pkgs.iptables}/sbin/iptables "$@"; }
+ ip6tables() { ${pkgs.iptables}/sbin/ip6tables "$@"; }
+ ipXtables() { ip4tables "$@" && ip6tables "$@"; }
+
+ # XXX This fails with the original CAC CentOS 7 kernel.
+ if ipXtables -vL >/dev/null; then
+
+ #
+ # nat
+ #
+
+ # reset tables
+ ipXtables -t nat -F
+ ipXtables -t nat -X
+
+ #
+ ipXtables -t nat -A PREROUTING -j REDIRECT ! -i retiolum -p tcp --dport ssh --to-ports 0
+ ipXtables -t nat -A PREROUTING -j REDIRECT -p tcp --dport 11423 --to-ports ssh
+
+ #
+ # filter
+ #
+
+ # reset tables
+ ipXtables -P INPUT DROP
+ ipXtables -P FORWARD DROP
+ ipXtables -F
+ ipXtables -X
+
+ # create custom chains
+ ipXtables -N Retiolum
+
+ # INPUT
+ ipXtables -A INPUT -j ACCEPT -m conntrack --ctstate RELATED,ESTABLISHED
+ ipXtables -A INPUT -j ACCEPT -i lo
+ ipXtables -A INPUT -j ACCEPT -p tcp --dport ssh -m conntrack --ctstate NEW
+ #ipXtables -A INPUT -j ACCEPT -p tcp --dport http -m conntrack --ctstate NEW
+ ipXtables -A INPUT -j ACCEPT -p tcp --dport tinc -m conntrack --ctstate NEW
+ ipXtables -A INPUT -j ACCEPT -p tcp --dport smtp -m conntrack --ctstate NEW
+ #ipXtables -A INPUT -j ACCEPT -p tcp --dport xmpp-client -m conntrack --ctstate NEW
+ #ipXtables -A INPUT -j ACCEPT -p tcp --dport xmpp-server -m conntrack --ctstate NEW
+
+ ipXtables -A INPUT -j Retiolum -i retiolum
+ ${when log "ipXtables -A INPUT -j LOG --log-level info --log-prefix 'INPUT DROP '"}
+
+ # FORWARD
+ ${when log "ipXtables -A FORWARD -j LOG --log-level info --log-prefix 'FORWARD DROP '"}
+
+ # Retiolum
+ ip4tables -A Retiolum -j ACCEPT -p icmp --icmp-type echo-request
+ ip6tables -A Retiolum -j ACCEPT -p ipv6-icmp -m icmp6 --icmpv6-type echo-request
+
+
+ ${when log "ipXtables -A Retiolum -j LOG --log-level info --log-prefix 'REJECT '"}
+ ipXtables -A Retiolum -j REJECT -p tcp --reject-with tcp-reset
+ ip4tables -A Retiolum -j REJECT -p udp --reject-with icmp-port-unreachable
+ ip4tables -A Retiolum -j REJECT --reject-with icmp-proto-unreachable
+ ip6tables -A Retiolum -j REJECT -p udp --reject-with icmp6-port-unreachable
+ ip6tables -A Retiolum -j REJECT
+ fi
+ '';
+}
diff --git a/modules/networking-cd.nix b/modules/networking-cd.nix
new file mode 100644
index 000000000..215e20829
--- /dev/null
+++ b/modules/networking-cd.nix
@@ -0,0 +1,14 @@
+{...}:
+{
+ networking.hostName = "cd";
+ networking.interfaces.enp2s1.ip4 = [
+ {
+ address = "162.219.7.216";
+ prefixLength = 24;
+ }
+ ];
+ networking.defaultGateway = "162.219.7.1";
+ networking.nameservers = [
+ "8.8.8.8"
+ ];
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-04 15:16:51 +0000