diff --git a/data/filter.txt b/data/filter.txt
index 7177cee3c..8a84c0ec5 100644
--- a/data/filter.txt
+++ b/data/filter.txt
@@ -1,2 +1,29 @@
-# For Quagga Rules: 
-# For BIRD Rules:   (see also: utils/bgp-filter.rb)
+# For Quagga Rules:
+#   cat filter.txt | \
+#       grep -e  ^[0-9] | \
+#       awk '{ print "ip prefix-list dn42-in seq " $1 " " $2 " " $3 " ge " $4 " le " $5}' | \
+#       sed "s_/\([0-9]\+\) ge \1_/\1_g;s_/\([0-9]\+\) le \1_/\1_g"
+#
+# For BIRD Rules: (see also: utils/bgp-filter.rb)
+#   cat filter.txt | \
+#       awk 'BEGIN {printf "function is_valid_network() {\n return net ~ [\n" } \
+#            /^[0-9]/ && $2 ~ /permit/ {printf "     %s{%s,%s},\n", $3, $4, $5};' | \
+#       sed "$ s/,$/\n  ];\n}/"
+
+
+# Nr	Action	Prefix			MinLen	MaxLen
+0010	permit	172.20.0.0/14		21	29	# dn42 main net
+0011	permit	172.20.0.0/24		28	32	# dn42 Anycast range
+0012	permit  172.21.0.0/24		28	32	# dn42 Anycast range
+0013    permit  172.22.0.0/24           28      32      # dn42 Anycast range
+0014    permit  172.23.0.0/24           28      32      # dn42 Anycast range
+
+0020	deny	10.10.10.0/24		24	32	# kabel deutschland/superkabel has DNS servers there (IDIOTS)
+0021    permit  10.100.0.0/14           14      32      # chaosvpn
+0022	permit	10.0.0.0/8		15	22	# freifunk/chaosvpn
+
+0030    permit  172.24.0.0/16           21      29      # ORG-ETH2 Hacker spaces.
+0040	permit	172.31.0.0/16		16	32	# chaosvpn
+
+1000	deny	0.0.0.0/0		0	32	# block the rest 
+
diff --git a/data/filter6.txt b/data/filter6.txt
index 91a1a93e2..821a1e282 100644
--- a/data/filter6.txt
+++ b/data/filter6.txt
@@ -1,4 +1,17 @@
-# To Quagga Rules:       
-# For BIRD Rules:        (see also: utils/bgp-filter.rb)
-0010    deny      fc00:  :/8                     8      128       # ULA (undefined)
-0011    permit    fd00:  :/8                    48       80       # ULA (defined)
+# To Quagga Rules:
+#   cat filter6.txt | \
+#       grep -e  ^[0-9] | \
+#       awk '{ print "ipv prefix-list dn42v6-in seq " $1 " " $2 " " $3 " ge " $4 " le " $5}' | \
+#       sed "s_/\([0-9]\+\) ge \1_/\1_g;s_/\([0-9]\+\) le \1_/\1_g"
+#
+# For BIRD Rules: (see also: utils/bgp-filter.rb)
+#   cat filter6.txt | \
+#       awk 'BEGIN {printf "function is_valid_network() {\n return net ~ [\n" } \
+#            /^[0-9]/ && $2 ~ /permit/ {printf "     %s{%s,%s},\n", $3, $4, $5};' | \
+#       sed "$ s/,$/\n  ];\n}/"
+
+# Nr    Action    Prefix                      MinLen  MaxLen    # Comment
+0010    deny      fc00::/8                     8      128       # ULA (undefined)
+0011    permit    fd00::/8                    48       80       # ULA (defined)
+
+