Changes fail2ban to use DOCKER-USER chain

docker-compose.yml

@@ -72,6 +72,7 @@ services:
       DNS1: 1.1.1.1
       DNS2: 1.0.0.1
       VIRTUAL_HOST: pihole.abhinavsarkar.net
+      TZ: "Asia/Kolkata"
     ports:
       - "53:53/tcp"
       - "53:53/udp"

fail2ban/iptables-pihole-geoip-fence.conf

@@ -11,23 +11,21 @@ before = iptables-blocktype.conf
 # Notes.:  command executed once at the start of Fail2Ban.
 # Values:  CMD
 #
-actionstart = iptables -N f2b-<name>
-              iptables -A f2b-<name> -j RETURN
-              iptables -I <chain> -p <protocol> -m multiport --dports <port> -j f2b-<name>
+actionstart = iptables -N DOCKER-USER
+              iptables -A DOCKER-USER -j RETURN
 
 # Option:  actionstop
 # Notes.:  command executed once at the end of Fail2Ban
 # Values:  CMD
 #
-actionstop = iptables -D <chain> -p <protocol> -m multiport --dports <port> -j f2b-<name>
-             iptables -F f2b-<name>
-             iptables -X f2b-<name>
+actionstop = iptables -F DOCKER-USER
+             iptables -X DOCKER-USER
 
 # Option:  actioncheck
 # Notes.:  command executed once before each actionban command
 # Values:  CMD
 #
-actioncheck = iptables -n -L <chain> | grep -q 'f2b-<name>[ \t]'
+actioncheck = iptables -n -L <chain> | grep -q 'DOCKER-USER[ \t]'
 
 # Option:  actionban
 # Notes.:  command executed when banning an IP. Take care that the
@@ -37,7 +35,7 @@ actioncheck = iptables -n -L <chain> | grep -q 'f2b-<name>[ \t]'
 #
 actionban = IP=<ip> &&
             COUNTRY=$(geoiplookup $IP | egrep "<country_list>") && [ "$COUNTRY" ] ||
-            (iptables -I f2b-<name> 1 -s <ip> -j <blocktype>)
+            (iptables -I DOCKER-USER 1 -s <ip> -j <blocktype>)
 
 # Option:  actionunban
 # Notes.:  command executed when unbanning an IP. Take care that the
@@ -47,7 +45,7 @@ actionban = IP=<ip> &&
 #
 actionunban = IP=<ip> &&
               COUNTRY=$(geoiplookup $IP | egrep "<country_list>") && [ "$COUNTRY" ] ||
-              (iptables -D f2b-<name> -s <ip> -j <blocktype>)
+              (iptables -D DOCKER-USER -s <ip> -j <blocktype>)
 
 [Init]
 
@@ -59,7 +57,7 @@ country_list = IN|India
 
 # Default name of the chain
 #
-name = pihole-geoip
+name = DOCKER-USER
 
 # Option:  port
 # Notes.:  specifies port to monitor