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Add Filterrule to avoid VPN Loops
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Bastian Mäuser 2021-08-03 11:37:19 +02:00
parent ad4b92cc7a
commit af77b22030
2 changed files with 5 additions and 1 deletions
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4
roles/exit_ip/templates/rules.v4.j2
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@ -8,8 +8,10 @@
COMMIT COMMIT
*filter *filter
:INPUT ACCEPT [1124:131621] :INPUT ACCEPT [1124:131621]
-A INPUT -p udp -m multiport -i br-{{ site_code }} --destination-ports {{ fastd_port }}:{{ fastd_port + (fastd_instances-1) }} -j LOG --log-prefix "vpn-int-loop-" -m limit --limit 5/min -A INPUT -p udp -m multiport -i br-{{ site_code }} --destination-ports {{ fastd_port }}:{{ fastd_port + (fastd_instances-1) }} -j LOG --log-prefix "fastd-vpn-int-loop-" -m limit --limit 5/min
-A INPUT -p udp -m multiport -i br-{{ site_code }} --destination-ports {{ fastd_port }}:{{ fastd_port + (fastd_instances-1) }} -j REJECT -A INPUT -p udp -m multiport -i br-{{ site_code }} --destination-ports {{ fastd_port }}:{{ fastd_port + (fastd_instances-1) }} -j REJECT
-A INPUT -p udp -i br-{{ site_code }} --dport {{ mesh_wg_port }} -j LOG --log-prefix "wg-vpn-int-loop-" -m limit --limit 5/min
-A INPUT -p udp -i br-{{ site_code }} --dport {{ mesh_wg_port }} -j REJECT
:FORWARD ACCEPT [0:0] :FORWARD ACCEPT [0:0]
-A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu -A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
:OUTPUT ACCEPT [1151:175226] :OUTPUT ACCEPT [1151:175226]

2
roles/exit_ip/templates/rules.v6.j2
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@ -3,6 +3,8 @@
:INPUT ACCEPT [0:0] :INPUT ACCEPT [0:0]
-A INPUT -p udp -m multiport -i br-{{ site_code }} --destination-ports {{ fastd_port }}:{{ fastd_port + (fastd_instances-1) }} -j LOG --log-prefix "vpn-int-loop-" -m limit --limit 5/min -A INPUT -p udp -m multiport -i br-{{ site_code }} --destination-ports {{ fastd_port }}:{{ fastd_port + (fastd_instances-1) }} -j LOG --log-prefix "vpn-int-loop-" -m limit --limit 5/min
-A INPUT -p udp -m multiport -i br-{{ site_code }} --destination-ports {{ fastd_port }}:{{ fastd_port + (fastd_instances-1) }} -j REJECT -A INPUT -p udp -m multiport -i br-{{ site_code }} --destination-ports {{ fastd_port }}:{{ fastd_port + (fastd_instances-1) }} -j REJECT
-A INPUT -p udp -i br-{{ site_code }} --dport {{ mesh_wg_port }} -j LOG --log-prefix "wg-vpn-int-loop-" -m limit --limit 5/min
-A INPUT -p udp -i br-{{ site_code }} --dport {{ mesh_wg_port }} -j REJECT
:FORWARD ACCEPT [0:0] :FORWARD ACCEPT [0:0]
-A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu -A FORWARD -p tcp -m tcp --tcp-flags SYN,RST SYN -j TCPMSS --clamp-mss-to-pmtu
:OUTPUT ACCEPT [0:0] :OUTPUT ACCEPT [0:0]