diff options
Diffstat (limited to 'roles/common/templates')
| -rwxr-xr-x | roles/common/templates/etc/nftables.conf.j2 | 8 | ||||
| -rw-r--r-- | roles/common/templates/etc/ntp.conf.j2 | 12 | ||||
| -rw-r--r-- | roles/common/templates/etc/systemd/timesyncd.conf.d/fripost.conf.j2 | 9 |
3 files changed, 15 insertions, 14 deletions
diff --git a/roles/common/templates/etc/nftables.conf.j2 b/roles/common/templates/etc/nftables.conf.j2 index c89a136..808383c 100755 --- a/roles/common/templates/etc/nftables.conf.j2 +++ b/roles/common/templates/etc/nftables.conf.j2 @@ -151,79 +151,83 @@ table inet filter { chain input { type filter hook input priority 0 policy drop iif lo accept # XXX Bullseye: this is a rather crude match as nftables 0.9.0 lacks support for ipsec expressions # to match match inbound resp. outbound policies and source resp. destination tunnel addresses. # https://serverfault.com/questions/971735/how-to-match-reqid-in-nftables # https://blog.fraggod.net/2016/09/25/nftables-re-injected-ipsec-matching-without-xt_policy.html # (We can't use marks to match post-ESP decapsulation here because that doesn't work well with UDP # encapsulation.) We'll also pin the reqid to the lowest address byte in ipsec.conf(5); that way # peers can't impersonate each other. meta l4proto esp accept # ip saddr {{ ipsec_subnet }} ip daddr {{ ipsec[inventory_hostname_short] }} ipsec in reqid $i accept ip saddr {{ ipsec_subnet }} ip daddr {{ ipsec[inventory_hostname_short] }} meta secpath exists accept # incoming ICMP/ICMPv6 traffic was filtered in the ingress chain already meta l4proto { icmp, icmpv6 } counter accept - udp sport 123 udp dport 123 ct state related,established accept + # NTP (ntpd uses sport 123 but systemd-timesyncd does not) + udp sport 123 ct state related,established accept + {% if groups.all | length > 1 %} udp sport 500 udp dport 500 ct state new,related,established accept {% if groups.NATed | length > 0 %} udp sport 4500 udp dport 4500 ct state new,related,established accept {% endif %} {% endif %} udp sport 53 ct state related,established accept tcp sport 53 ct state related,established accept {% if 'dhclient' in group_names %} ip version 4 udp sport 67 udp dport 68 ct state related,established accept ip6 version 6 udp sport 547 udp dport 546 ct state related,established accept {% endif %} meta l4proto tcp ip saddr @fail2ban counter drop meta l4proto tcp ip6 saddr @fail2ban6 counter drop tcp dport $in-tcp-ports ct state related,established accept tcp dport $in-tcp-ports ct state new counter accept tcp sport $out-tcp-ports ct state related,established accept } chain output { type filter hook output priority 0 policy drop oif lo accept # XXX Bullseye: unlike for input we can't use marks or test for # secpath existence here, because by the time we see a packet to # 172.16.0.0/24 we don't know if it'll be encapsulated meta l4proto esp accept # ip saddr {{ ipsec[inventory_hostname_short] }} ip daddr {{ ipsec_subnet }} ipsec out reqid $i accept ip saddr {{ ipsec[inventory_hostname_short] }} ip daddr {{ ipsec_subnet }} accept meta l4proto { icmp, icmpv6 } counter accept - udp sport 123 udp dport 123 ct state new,related,established accept + # NTP (ntpd uses sport 123 but systemd-timesyncd does not) + udp dport 123 ct state new,related,established accept + {% if groups.all | length > 1 %} udp sport 500 udp dport 500 ct state new,related,established accept {% if groups.NATed | length > 0 %} udp sport 4500 udp dport 4500 ct state new,related,established accept {% endif %} {% endif %} udp dport 53 ct state new,related,established accept tcp dport 53 ct state new,related,established accept {% if 'dhclient' in group_names %} ip version 4 udp sport 68 udp dport 67 ct state new,related,established accept ip6 version 6 udp sport 546 udp dport 547 ct state new,related,established accept {% endif %} tcp sport $in-tcp-ports ct state related,established accept tcp dport $out-tcp-ports ct state related,established accept tcp dport $out-tcp-ports ct state new counter accept meta l4proto tcp counter reject with tcp reset meta l4proto udp counter reject diff --git a/roles/common/templates/etc/ntp.conf.j2 b/roles/common/templates/etc/ntp.conf.j2 index 1016d55..b76f0dd 100644 --- a/roles/common/templates/etc/ntp.conf.j2 +++ b/roles/common/templates/etc/ntp.conf.j2 @@ -1,57 +1,45 @@ # /etc/ntp.conf, configuration for ntpd; see ntp.conf(5) for help driftfile /var/lib/ntp/ntp.drift # Leap seconds definition provided by tzdata leapfile /usr/share/zoneinfo/leap-seconds.list # Enable this if you want statistics to be logged. #statsdir /var/log/ntpstats/ statistics loopstats peerstats clockstats filegen loopstats file loopstats type day enable filegen peerstats file peerstats type day enable filegen clockstats file clockstats type day enable # You do need to talk to an NTP server or two (or three). -{% if 'NTP_master' in group_names %} # Use Stratum One Time Servers: # http://support.ntp.org/bin/view/Servers/StratumOneTimeServers server sth1.ntp.se iburst server sth2.ntp.se iburst server gbg1.ntp.se iburst server gbg2.ntp.se iburst server ntp1.sp.se iburst server ntp2.sp.se iburst -{% else %} -# Sychronize to our (stratum 2) NTP server, to ensure our network has a -# consistent time. -{% for host in groups['NTP_master'] | sort %} -server {{ ipsec[ hostvars[host].inventory_hostname_short ] }} prefer iburst -{% endfor %} -pool 0.{{ geoip | default('debian') }}.pool.ntp.org iburst -pool 1.{{ geoip | default('debian') }}.pool.ntp.org iburst -pool 2.{{ geoip | default('debian') }}.pool.ntp.org iburst -pool 3.{{ geoip | default('debian') }}.pool.ntp.org iburst -{% endif %} # Access control configuration; see /usr/share/doc/ntp-doc/html/accopt.html for # details. The web page <http://support.ntp.org/bin/view/Support/AccessRestrictions> # might also be helpful. # # Note that "restrict" applies to both servers and clients, so a configuration # that might be intended to block requests from certain clients could also end # up blocking replies from your own upstream servers. # By default, exchange time with everybody, but don't allow configuration. restrict -4 default kod notrap nomodify nopeer noquery limited restrict -6 default kod notrap nomodify nopeer noquery limited # Local users may interrogate the ntp server more closely. restrict 127.0.0.1 restrict ::1 # Needed for adding pool entries restrict source notrap nomodify noquery diff --git a/roles/common/templates/etc/systemd/timesyncd.conf.d/fripost.conf.j2 b/roles/common/templates/etc/systemd/timesyncd.conf.d/fripost.conf.j2 new file mode 100644 index 0000000..f578cd9 --- /dev/null +++ b/roles/common/templates/etc/systemd/timesyncd.conf.d/fripost.conf.j2 @@ -0,0 +1,9 @@ +[Time] +# Sychronize to our (stratum 2) NTP server, to ensure our network has a +# consistent time. +{%- set ntp = [] -%} +{%- for host in groups['NTP_master'] -%} +{%- set _ = ntp.append(ipsec[ hostvars[host].inventory_hostname_short ]) -%} +{%- endfor %} + +NTP={{ ntp | join(' ') }} |