This will avoid outgoing IPsec traffic being dropped by IPFire itself, if the default firewall behavior for outgoing traffic is set to "blocked", and no appropriate rules have been manually configured in the web interface.
To ensure configured IPsec tunnels will always work flawlessly, regardless of the firewall default policy and any manually created firewall rules, create and delete outgoing iptables rules accordingly when bringing an IPsec connection up or down.
Tested-by: Peter Müller peter.mueller@ipfire.org Signed-off-by: Peter Müller peter.mueller@ipfire.org --- src/patches/strongswan-ipfire.patch | 49 +++++++++++++++++------------ 1 file changed, 29 insertions(+), 20 deletions(-)
diff --git a/src/patches/strongswan-ipfire.patch b/src/patches/strongswan-ipfire.patch index d8e35cd52..a1f80d361 100644 --- a/src/patches/strongswan-ipfire.patch +++ b/src/patches/strongswan-ipfire.patch @@ -1,13 +1,5 @@ -commit b439f74361d393bcb85109b6c41a905cf613a296 -Author: Peter Müller peter.mueller@ipfire.org -Date: Wed May 18 17:46:57 2022 +0000 - - IPFire modifications to _updown script - - Signed-off-by: Peter Müller peter.mueller@ipfire.org - diff --git a/src/_updown/_updown.in b/src/_updown/_updown.in -index 34eaf68c7..9ed387a0a 100644 +index 34eaf68c7..38aa63354 100644 --- a/src/_updown/_updown.in +++ b/src/_updown/_updown.in @@ -242,10 +242,10 @@ up-host:iptables) @@ -98,7 +90,7 @@ index 34eaf68c7..9ed387a0a 100644 -s $PLUTO_PEER -d $PLUTO_ME $IPSEC_POLICY_IN -j ACCEPT fi # -@@ -342,47 +324,37 @@ up-client:iptables) +@@ -342,47 +324,46 @@ up-client:iptables) if [ "$PLUTO_PEER_CLIENT" = "$PLUTO_PEER/32" ] then logger -t $TAG -p $FAC_PRIO \ @@ -111,7 +103,7 @@ index 34eaf68c7..9ed387a0a 100644 fi fi + -+ # Open Firewall for IPinIP + AH + ESP Traffic ++ # Open firewall for incoming and outgoing IPinIP + AH + ESP traffic to the peers' IP + iptables --wait -I IPSECINPUT 1 -i $PLUTO_INTERFACE -p IPIP \ + -s $PLUTO_PEER $S_PEER_PORT \ + -d $PLUTO_ME $D_MY_PORT -j ACCEPT @@ -121,6 +113,15 @@ index 34eaf68c7..9ed387a0a 100644 + iptables --wait -I IPSECINPUT 1 -i $PLUTO_INTERFACE -p ESP \ + -s $PLUTO_PEER $S_PEER_PORT \ + -d $PLUTO_ME $D_MY_PORT -j ACCEPT ++ iptables --wait -I IPSECOUTPUT 1 -o $PLUTO_INTERFACE -p IPIP \ ++ -s $PLUTO_ME $D_MY_PORT \ ++ -d $PLUTO_PEER $S_PEER_PORT -j ACCEPT ++ iptables --wait -I IPSECOUTPUT 1 -o $PLUTO_INTERFACE -p AH \ ++ -s $PLUTO_ME $D_MY_PORT \ ++ -d $PLUTO_PEER $S_PEER_PORT -j ACCEPT ++ iptables --wait -I IPSECOUTPUT 1 -o $PLUTO_INTERFACE -p ESP \ ++ -s $PLUTO_ME $D_MY_PORT \ ++ -d $PLUTO_PEER $S_PEER_PORT -j ACCEPT + ;; down-client:iptables) @@ -161,7 +162,7 @@ index 34eaf68c7..9ed387a0a 100644 -s $PLUTO_PEER -d $PLUTO_ME $IPSEC_POLICY_IN -j ACCEPT fi # -@@ -392,12 +364,24 @@ down-client:iptables) +@@ -392,12 +373,32 @@ down-client:iptables) if [ "$PLUTO_PEER_CLIENT" = "$PLUTO_PEER/32" ] then logger -t $TAG -p $FAC_PRIO -- \ @@ -174,7 +175,7 @@ index 34eaf68c7..9ed387a0a 100644 fi fi + -+ # Close Firewall for IPinIP + AH + ESP Traffic ++ # Close firewall for incoming and outgoing IPinIP + AH + ESP traffic to the peers' IP + iptables --wait -D IPSECINPUT -i $PLUTO_INTERFACE -p IPIP \ + -s $PLUTO_PEER $S_PEER_PORT \ + -d $PLUTO_ME $D_MY_PORT -j ACCEPT @@ -184,11 +185,19 @@ index 34eaf68c7..9ed387a0a 100644 + iptables --wait -D IPSECINPUT -i $PLUTO_INTERFACE -p ESP \ + -s $PLUTO_PEER $S_PEER_PORT \ + -d $PLUTO_ME $D_MY_PORT -j ACCEPT -+ ++ iptables --wait -D IPSECINPUT -o $PLUTO_INTERFACE -p IPIP \ ++ -s $PLUTO_ME $D_MY_PORT \ ++ -d $PLUTO_PEER $S_PEER_PORT -j ACCEPT ++ iptables --wait -D IPSECINPUT -o $PLUTO_INTERFACE -p AH \ ++ -s $PLUTO_ME $D_MY_PORT \ ++ -d $PLUTO_PEER $S_PEER_PORT -j ACCEPT ++ iptables --wait -D IPSECINPUT -o $PLUTO_INTERFACE -p ESP \ ++ -s $PLUTO_ME $D_MY_PORT \ ++ -d $PLUTO_PEER $S_PEER_PORT -j ACCEPT ;; # # IPv6 -@@ -422,10 +406,10 @@ up-host-v6:iptables) +@@ -422,10 +423,10 @@ up-host-v6:iptables) # connection to me, with (left/right)firewall=yes, coming up # This is used only by the default updown script, not by your custom # ones, so do not mess with it; see CAUTION comment up at top. @@ -201,7 +210,7 @@ index 34eaf68c7..9ed387a0a 100644 -s $PLUTO_ME $S_MY_PORT $IPSEC_POLICY_OUT \ -d $PLUTO_PEER_CLIENT $D_PEER_PORT -j ACCEPT # -@@ -454,10 +438,10 @@ down-host-v6:iptables) +@@ -454,10 +455,10 @@ down-host-v6:iptables) # connection to me, with (left/right)firewall=yes, going down # This is used only by the default updown script, not by your custom # ones, so do not mess with it; see CAUTION comment up at top. @@ -214,7 +223,7 @@ index 34eaf68c7..9ed387a0a 100644 -s $PLUTO_ME $S_MY_PORT $IPSEC_POLICY_OUT \ -d $PLUTO_PEER_CLIENT $D_PEER_PORT -j ACCEPT # -@@ -487,10 +471,10 @@ up-client-v6:iptables) +@@ -487,10 +488,10 @@ up-client-v6:iptables) # ones, so do not mess with it; see CAUTION comment up at top. if [ "$PLUTO_PEER_CLIENT" != "$PLUTO_MY_SOURCEIP/128" ] then @@ -227,7 +236,7 @@ index 34eaf68c7..9ed387a0a 100644 -s $PLUTO_PEER_CLIENT $S_PEER_PORT \ -d $PLUTO_MY_CLIENT $D_MY_PORT $IPSEC_POLICY_IN -j ACCEPT fi -@@ -499,10 +483,10 @@ up-client-v6:iptables) +@@ -499,10 +500,10 @@ up-client-v6:iptables) # or sometimes host access via the internal IP is needed if [ -n "$PLUTO_MY_SOURCEIP" -o -n "$PLUTO_HOST_ACCESS" ] then @@ -240,7 +249,7 @@ index 34eaf68c7..9ed387a0a 100644 -s $PLUTO_MY_CLIENT $S_MY_PORT \ -d $PLUTO_PEER_CLIENT $D_PEER_PORT $IPSEC_POLICY_OUT -j ACCEPT fi -@@ -535,11 +519,11 @@ down-client-v6:iptables) +@@ -535,11 +536,11 @@ down-client-v6:iptables) # ones, so do not mess with it; see CAUTION comment up at top. if [ "$PLUTO_PEER_CLIENT" != "$PLUTO_MY_SOURCEIP/128" ] then @@ -254,7 +263,7 @@ index 34eaf68c7..9ed387a0a 100644 -s $PLUTO_PEER_CLIENT $S_PEER_PORT \ -d $PLUTO_MY_CLIENT $D_MY_PORT \ $IPSEC_POLICY_IN -j ACCEPT -@@ -549,11 +533,11 @@ down-client-v6:iptables) +@@ -549,11 +550,11 @@ down-client-v6:iptables) # or sometimes host access via the internal IP is needed if [ -n "$PLUTO_MY_SOURCEIP" -o -n "$PLUTO_HOST_ACCESS" ] then
-
Peter Müller