diff --git a/conf/post_declarations.conf b/conf/post_declarations.conf
new file mode 100644
index 0000000..e6a8137
--- /dev/null
+++ b/conf/post_declarations.conf
@@ -0,0 +1,621 @@
+#!/usr/bin/env bash
+
+
+# -----------
+# --- Define Arrays
+# -----------
+
+# ---
+# NAT (Masquerade) Network interfaces
+# ---
+
+declare -a nat_device_arr=()
+for _dev in $nat_devices ; do
+   if ! containsElement $_dev "${nat_device_arr[@]}" ; then
+      nat_device_arr+=("$_dev")
+   fi
+done
+
+
+# ---
+# IP Addresses LX Guest System
+# ---
+
+declare -a lxc_guest_ip_arr=()
+for _ip in $lxc_guest_ips ; do
+   lxc_guest_ip_arr+=("$_ip")
+done
+
+
+# ---
+# local Interfaces
+# ---
+
+declare -a local_ip_arr=()
+for _ip in $local_ips ; do
+   local_ip_arr+=("$_ip")
+done
+
+
+# ---
+# - IP Addresses to log
+# ---
+declare -a log_ip_arr
+for _ip in $log_ips ; do
+   log_ip_arr+=("$_ip")
+done
+
+
+# ---
+# - LOG CGI script Traffic out
+# ---
+declare -a cgi_script_user_arr=()
+for _user in $cgi_script_users ; do
+   cgi_script_user_arr+=($_user)
+done
+
+
+# ---
+# - IP-Addresses (Host, Guests (VServer, LX_Container)
+# ---
+declare -a ext_ip_arr
+for _ip in $ext_ips ; do
+   host_ip_arr+=("$_ip")
+done
+
+# ---
+# - Extern Interfaces
+# ---
+declare -a ext_if_arr
+for _dev in $ext_ifs ; do
+   ext_if_arr+=("$_dev")
+done
+
+# ---
+# - VPN Interfaces
+# ---
+declare -a vpn_if_arr
+for _dev in $vpn_ifs ; do
+   vpn_if_arr+=("$_dev")
+done
+
+# ---
+# - WireGuard Interfaces
+# ---
+declare -a wg_if_arr
+for _dev in $wg_ifs ; do
+   wg_if_arr+=("$_dev")
+done
+
+# ---
+# - Local Network Interfaces
+# ---
+declare -a local_if_arr
+for _dev in $local_ifs ; do
+   local_if_arr+=("$_dev")
+done
+
+# ---
+# - Network Interfaces completly blocked
+# ---
+declare -a blocked_if_arr
+for _dev in $blocked_ifs ; do
+   blocked_if_arr+=("$_dev")
+done
+
+# ---
+# - Network Interfaces not firewalled
+# ---
+declare -a unprotected_if_arr
+for _dev in $unprotected_ifs ; do
+   unprotected_if_arr+=("$_dev")
+done
+
+# ---
+# - Restrict local Servive to given IP-Address/Network
+# ---
+declare -a restrict_local_service_to_net_arr
+for _val in $restrict_local_service_to_net ; do
+   restrict_local_service_to_net_arr+=("$_val")
+done
+
+# ---
+# - Restrict local Network to given IP-Address/Network
+# ---
+declare -a restrict_local_net_to_net_arr
+for _val in $restrict_local_net_to_net ; do
+   restrict_local_net_to_net_arr+=("$_val")
+done
+
+# ---
+# - Allow extern Service 
+# ---
+declare -a allow_ext_service_arr
+for _val in $allow_ext_service ; do
+   allow_ext_service_arr+=("$_val")
+done
+
+# ---
+# - Allow extern IP-Address/Network
+# ---
+declare -a allow_ext_net_arr
+for _net in $allow_ext_net ; do
+   allow_ext_net_arr+=("$_net")
+done
+
+# ---
+# - Allow (non-standard) local Services 
+# ---
+declare -a allow_local_service_arr
+for _val in $allow_local_service ; do
+   allow_local_service_arr+=("$_val")
+done
+
+# ---
+# - Allow (non-standard) local Services from specified network
+# ---
+declare -a allow_local_service_from_network_arr
+for _service in $allow_local_service_from_networks ; do
+   allow_local_service_from_network_arr+=("$_service")
+done
+
+# ---
+# - Generally block ports
+# ---
+declare -a block_tcp_port_arr
+for _port in $block_tcp_ports ; do
+   block_tcp_port_arr+=("$_port")
+done
+
+declare -a block_udp_port_arr
+for _port in $block_udp_ports ; do
+   block_udp_port_arr+=("$_port")
+done
+
+# ---
+# - Private IPs / IP-Ranges allowed to forward
+# ---
+declare -a forward_private_ip_arr
+for _ip in $forward_private_ips ; do
+   forward_private_ip_arr+=("$_ip")
+done
+
+# ---
+# - Network Interfaces DHCP Service
+# ---
+declare -a dhcp_server_if_arr
+for _dev in $dhcp_server_ifs ; do
+   dhcp_server_if_arr+=($_dev)
+done
+declare -a dhcp_client_if_arr
+for _dev in $dhcp_client_ifs ; do
+   dhcp_client_if_arr+=($_dev)
+done
+
+# ---
+# - IP Addresses DNS Server
+# ---
+# - local
+declare -a dns_server_ip_arr
+for _ip in $dns_server_ips ; do
+   dns_server_ip_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_dns_server_ip_arr
+for _ip in $forward_dns_server_ips ; do
+   forward_dns_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - Netwoks allowed access to local DNS Resolver
+# ---
+declare -a resolver_allowed_network_arr
+for _net in $resolver_allowed_networks ; do
+   resolver_allowed_network_arr+=("$_net")
+done
+
+# ---
+# - IP Addresses VPN Server
+# ---
+# local
+declare -a vpn_server_ip_arr
+for _ip in $vpn_server_ips ; do
+   vpn_server_ip_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_vpn_server_ip_arr
+for _ip in $forward_vpn_server_ips ; do
+   forward_vpn_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - IP Addresses WireGuard Service
+# ---
+# local
+declare -a wireguard_server_ip_arr
+for _ip in $wireguard_server_ips ; do
+   wireguard_server_ip_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_wireguard_server_ip_arr
+for _ip in $forward_wireguard_server_ips ; do
+   forward_wireguard_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - IP Addresses SSH Server
+# ---
+# local
+declare -a ssh_server_ip_arr
+for _ip in $ssh_server_ips ; do
+   ssh_server_ip_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_ssh_server_ip_arr
+for _ip in $forward_ssh_server_ips ; do
+   forward_ssh_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - IP Addresses HTTP Server
+# ---
+# local
+declare -a http_server_ip_arr
+for _ip in $http_server_ips ; do
+   http_server_ip_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_http_server_ip_arr
+for _ip in $forward_http_server_ips ; do
+   forward_http_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - IP Addresses MatterMost Service
+# ---
+# local
+declare -a mm_server_ip_arr
+for _ip in $mm_server_ips ; do
+   mm_server_ip_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_mm_server_ip_arr
+for _ip in $forward_mm_server_ips ; do
+   forward_mm_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - IP Addresses FTP Server
+# ---
+# local
+declare -a ftp_server_ip_arr
+for _ip in $ftp_server_ips ; do
+   ftp_server_ip_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_ftp_server_ip_arr
+for _ip in $forward_ftp_server_ips ; do
+   forward_ftp_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - Mail SMTP Server
+# ---
+# local
+declare -a smtpd_ips_arr
+for _ip in $smtpd_ips ; do
+   smtpd_ips_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_smtpd_ip_arr
+for _ip in $forward_smtpd_ips ; do
+   forward_smtpd_ip_arr+=("$_ip")
+done
+
+
+# ---
+# Additional SMTP Listen Ports
+# ---
+declare -a smtpd_additional_listen_port_arr
+for _port in $smtpd_additional_listen_ports ; do
+   smtpd_additional_listen_port_arr+=("$_port")
+done
+
+
+# ---
+# Additional SMTP Outgoing Ports
+# ---
+declare -a smtpd_additional_outgoung_port_arr
+for _port in $smtpd_additional_outgoung_ports ; do
+   smtpd_additional_outgoung_port_arr+=("$_port")
+done
+
+
+
+# ---
+# - IP Addresses XMPP Service (Jabber - Prosody)
+# ---
+declare -a xmpp_server_ip_arr
+for _ip in $xmpp_server_ips ; do
+   xmpp_server_ip_arr+=("$_ip")
+done
+
+declare -a forward_xmpp_server_ip_arr
+for _ip in $forward_xmpp_server_ips ; do
+   forward_xmpp_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - XMPP Remote Dovecote Out Service
+# ---
+declare -a xmmp_remote_out_service_arr
+for _val in $xmmp_remote_out_services ; do
+   xmmp_remote_out_service_arr+=("$_val")
+done
+
+# ---
+# - Mail Services (smtps/pop(s)/imap(s)
+# ---
+# local
+declare -a mail_server_ips_arr
+for _ip in $mail_server_ips ; do
+   mail_server_ips_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_mail_server_ip_arr
+for _ip in $forward_mail_server_ips ; do
+   forward_mail_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - Mail client (smtps/pop(s)/imap(s)
+# ---
+# local
+declare -a mail_client_ips_arr
+for _ip in $mail_client_ips ; do
+   mail_client_ips_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_mail_client_ip_arr
+for _ip in $forward_mail_client_ips ; do
+   forward_mail_client_ip_arr+=("$_ip")
+done
+
+# ---
+# - (local) Dovecot auth service
+# ---
+declare -a dovecot_auth_allowed_network_arr
+for _ip in $dovecot_auth_allowed_networks ; do
+   dovecot_auth_allowed_network_arr+=("$_ip")
+done
+
+# ---
+# - IP Addresses Mumble Server
+# ---
+# local
+declare -a mumble_server_ip_arr
+for _ip in $mumble_server_ips ; do
+   mumble_server_ip_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_mumble_server_ip_arr
+for _ip in $forward_mumble_server_ips ; do
+   forward_mumble_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - IP Addresses Jitsi Video Conferencing Server
+# ---
+declare -a jitsi_server_ip_arr
+for _ip in $jitsi_server_ips ; do
+   jitsi_server_ip_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_jitsi_server_ip_arr
+for _ip in $forward_jitsi_server_ips ; do
+   forward_jitsi_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - IP Addresses Remote Jibri Server
+# ---
+declare -a jitsi_jibri_remote_ip_arr
+for _ip in $jitsi_jibri_remote_ips ; do
+   jitsi_jibri_remote_ip_arr+=("$_ip")
+done
+
+# ---
+# - IP Addresses Jibri Recording / Streaming Server
+# ---
+declare -a jibri_server_ip_arr
+for _ip in $jibri_server_ips ; do
+   jibri_server_ip_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_jibri_server_ip_arr
+for _ip in $forward_jibri_server_ips ; do
+   forward_jibri_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - IP Addresses TURN Server (Stun Server) (for Nextcloud 'talk' app)
+# ---
+# local
+declare -a nc_turn_server_ip_arr
+for _ip in $nc_turn_server_ips ; do
+   nc_turn_server_ip_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_nc_turn_server_ip_arr
+for _ip in $forward_nc_turn_server_ips ; do
+   forward_nc_turn_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - IP Addresses Telephone Systems
+# ---
+declare -a tel_sys_ip_arr
+for _ip in $tel_sys_ips ; do
+   tel_sys_ip_arr+=("$_ip")
+done
+
+# ---
+# - Prometheus Monitoring - local Server
+# ---
+declare -a prometheus_local_server_ip_arr
+for _ip in $prometheus_local_server_ips ; do
+   prometheus_local_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - Prometheus Monitoring - local Client
+# ---
+declare -a prometheus_local_client_ip_arr
+for _ip in $prometheus_local_client_ips; do
+   prometheus_local_client_ip_arr+=("$_ip")
+done
+declare -a prometheus_remote_server_ip_arr
+for _ip in $prometheus_remote_server_ips ; do
+   prometheus_remote_server_ip_arr+=("$_ip")
+done
+
+
+# ---
+# - IP Addresses Munin
+# ---
+# local
+declare -a munin_server_ip_arr
+for _ip in $munin_server_ips ; do
+   munin_server_ip_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_munin_server_ip_arr
+for _ip in $forward_munin_server_ips ; do
+   forward_munin_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - IP Addresses XyMon
+# ---
+declare -a xymon_server_ip_arr
+for _ip in $xymon_server_ips ; do
+   xymon_server_ip_arr+=("$_ip")
+done
+
+# ---
+# - IP Addresses Rsync Out
+# ---
+# local
+declare -a rsync_out_ip_arr
+for _ip in $rsync_out_ips ; do
+   rsync_out_ip_arr+=("$_ip")
+done
+# DMZ
+declare -a forward_rsync_out_ip_arr
+for _ip in $forward_rsync_out_ips ; do
+   forward_rsync_out_ip_arr+=("$_ip")
+done
+
+# ---
+# - SSH Ports
+# ---
+declare -a ssh_port_arr
+for _port in $ssh_ports ; do
+   ssh_port_arr+=("$_port")
+done
+
+# ---
+# - XMPP Service (Jabber - Prosody)
+# ---
+declare -a xmmp_tcp_in_port_arr
+for _port in $xmmp_tcp_in_ports ; do
+   xmmp_tcp_in_port_arr+=("$_port")
+done
+
+declare -a xmmp_tcp_out_port_arr
+for _port in $xmmp_tcp_out_ports ; do
+   xmmp_tcp_out_port_arr+=("$_port")
+done
+
+# ---
+# - VPN Ports
+# ---
+# local
+declare -a vpn_port_arr
+for _port in $vpn_ports ; do
+   vpn_port_arr+=("$_port")
+done
+
+# ---
+# - Wireguard Ports (local Service)
+# ---
+# local
+declare -a wireguard_server_port_arr
+for _port in $wireguard_server_ports ; do
+   wireguard_server_port_arr+=("$_port")
+done
+
+# ---
+# - Wireguard out Ports
+# ---
+# local
+declare -a wireguard_out_port_port_arr
+for _port in $wireguard_out_ports ; do
+   wireguard_out_port_port_arr+=("$_port")
+done
+
+
+# ---
+# - Rsync Out Ports
+# --
+declare -a rsync_port_arr
+for _port in $rsync_ports ; do
+   rsync_port_arr+=("$_port")
+done
+
+
+# ---
+# - Special TCP Ports OUT
+# ---
+# local
+declare -a tcp_out_port_arr
+for _port in $tcp_out_ports ; do
+   tcp_out_port_arr+=("$_port")
+done
+# DMZ
+declare -a forward_tcp_out_port_arr
+for _port in $forward_tcp_out_ports ; do
+   forward_tcp_out_port_arr+=("$_port")
+done
+
+# ---
+# - Special UDP Ports OUT
+# ---
+# local
+declare -a udp_out_port_arr
+for _port in $udp_out_ports ; do
+   udp_out_port_arr+=("$_port")
+done
+# DMZ
+declare -a forward_udp_out_port_arr
+for _port in $forward_udp_out_ports ; do
+   forward_udp_out_port_arr+=("$_port")
+done
+
+
+# ---
+# - Portforwrds TCP
+# ---
+declare -a portforward_tcp_arr
+for _str in $portforward_tcp ; do
+   portforward_tcp_arr+=("$_str")
+done
+
+# ---
+# - Portforwrds UDP
+# ---
+declare -a portforward_udp_arr
+for _str in $portforward_udp ; do
+   portforward_udp_arr+=("$_str")
+done
+
diff --git a/ipt-firewall-server b/ipt-firewall-server
index b45cdd5..ea05b4b 100755
--- a/ipt-firewall-server
+++ b/ipt-firewall-server
@@ -13,7 +13,7 @@ conf_logging=${ipt_conf_dir}/logging_ipv4.conf
 conf_interfaces=${ipt_conf_dir}/interfaces_ipv4.conf
 conf_default_settings=${ipt_conf_dir}/default_settings.conf
 conf_main=${ipt_conf_dir}/main_ipv4.conf
-conf_post_declarations=${ipt_conf_dir}/post_decalrations.conf
+conf_post_declarations=${ipt_conf_dir}/post_declarations.conf
 conf_ban_ipv4_list="${ipt_conf_dir}/ban_ipv4.list"
 
 
@@ -225,7 +225,7 @@ if ! is_container ; then
    ## - Logging of spoofed (source routed" and "redirect") packets
    ## -
    if $kernel_log_martians ; then
-      echo "0" > /proc/sys/net/ipv4/conf/all/log_martians
+      echo "1" > /proc/sys/net/ipv4/conf/all/log_martians
    fi
 
    ## - Keine ICMP Umleitungspakete akzeptieren.
@@ -478,12 +478,13 @@ fi
 echononl "\tAllow forwarding (private) IPs / IP-Ranges.."
 if [[ ${#forward_private_ip_arr[@]} -gt 0 ]] ; then
    for _ip in ${forward_private_ip_arr[@]}; do
+      # NOTE: These IPs/IP-ranges are intentionally not firewalled (pass-through).
       if $log_forwarding_priv_ip || $log_all ; then
-         $ipt -t mangle -A PREROUTING -d $_ip -j $LOG_TARGET $tag_log_prefix "$log_prefix Accept priv ip $_ip: "
-         $ipt -t mangle -A PREROUTING -s $_ip -j $LOG_TARGET $tag_log_prefix "$log_prefix Accept priv ip $_ip: "
+         $ipt -A FORWARD -d $_ip -j $LOG_TARGET $tag_log_prefix "$log_prefix Not firewalled (forward) $_ip: "
+         $ipt -A FORWARD -s $_ip -j $LOG_TARGET $tag_log_prefix "$log_prefix Not firewalled (forward) $_ip: "
       fi
-      $ipt -t mangle -A PREROUTING -d $_ip -j ACCEPT
-      $ipt -t mangle -A PREROUTING -s $_ip -j ACCEPT
+      $ipt -A FORWARD -d $_ip -j ACCEPT
+      $ipt -A FORWARD -s $_ip -j ACCEPT
    done
    echo_done
 else