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-rw-r--r--etc/examples/bgpd.conf41
1 files changed, 28 insertions, 13 deletions
diff --git a/etc/examples/bgpd.conf b/etc/examples/bgpd.conf
index 57cba1874b3..a5fa7234a3c 100644
--- a/etc/examples/bgpd.conf
+++ b/etc/examples/bgpd.conf
@@ -1,13 +1,14 @@
-# $OpenBSD: bgpd.conf,v 1.8 2017/09/29 11:00:39 phessler Exp $
+# $OpenBSD: bgpd.conf,v 1.9 2018/06/13 09:44:57 claudio Exp $
# sample bgpd configuration file
# see bgpd.conf(5)
#macros
+ASN="65001"
peer1="10.1.0.2"
peer2="10.1.0.3"
# global configuration
-AS 65001
+AS $ASN
router-id 10.0.0.1
# holdtime 180
# holdtime min 3
@@ -16,7 +17,13 @@ router-id 10.0.0.1
# fib-update no
# route-collector no
# log updates
-# network 10.0.1.0/24
+
+# prefix set of networks that may be announced
+prefix-set mynetworks { 192.0.2.0/24 }
+
+# Announce networks, tag them with a large community to ease filtering
+# network 192.0.2.0/24 set large-community $ASN:1:1
+# network static set large-community $ASN:1:2
# restricted socket for bgplg(8)
# socket "/var/www/run/bgpd.rsock" restricted
@@ -26,12 +33,10 @@ group "peering AS65002" {
remote-as 65002
neighbor $peer1 {
descr "AS 65001 peer 1"
- announce self
tcp md5sig password mekmitasdigoat
}
neighbor $peer2 {
descr "AS 65001 peer 2"
- announce all
local-address 10.0.0.8
ipsec esp ike
}
@@ -54,7 +59,7 @@ neighbor 10.0.1.0 {
passive
holdtime 180
holdtime min 3
- announce none
+ export none
tcp md5sig key deadbeef
}
@@ -79,14 +84,12 @@ neighbor 10.2.1.1 {
aes 4e0f2f1b5c4e3c0d0e2f2d3b8c5c8f0b
}
-# do not send or use routes from EBGP neighbors without
-# further explicit configuration
-deny from ebgp
-deny to ebgp
+##
+## inbound rules: default is deny
+##
-# allow updates to and from IBGP neighbors
+# IBGP: allow all updates from our neighbors
allow from ibgp
-allow to ibgp
# filter out prefixes longer than 24 or shorter than 8 bits for IPv4
# and longer than 48 or shorter than 16 bits for IPv6.
@@ -140,7 +143,19 @@ deny from any AS 23456 # AS_TRANS
deny from any AS 64496 - 64511 # Reserved for use in docs and code RFC5398
deny from any AS 64512 - 65534 # Reserved for Private Use RFC6996
deny from any AS 65535 # Reserved RFC7300
-deny from any AS 65536 - 65551 # Reserved for use in docs and code RFC5398
+deny from any AS 65536 - 65551 # Reserved for use in docs and code RFC5398
deny from any AS 65552 - 131071 # Reserved
deny from any AS 4200000000 - 4294967294 # Reserved for Private Use RFC6996
deny from any AS 4294967295 # Reserved RFC7300
+
+##
+## outbound rules: default is deny
+##
+
+# IBGP: allow all updates to our neighbors
+allow to ibgp
+
+# EBGP: only allow self originated networks to ebgp peers
+# Don't leak any routes from upstream or peering sessions. This is done
+# by checking for routes that are tagged with the large-community $ASN:1:1
+allow to ebgp prefix-set mynetworks large-community $ASN:1:1