I've came to a solution, using MACVLAN. Inspired on https://forum.archive.openwrt.org/viewtopic.php?id=65292.
First the kmod-macvlan
package should be installed with opkg
(or LUCI, or build in).
/etc/config/network
:
config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config globals 'globals'
option ula_prefix 'xxxxx02:a420::/48'
config device 'lan_eth0_1_dev'
option name 'eth0.1'
option macaddr 'xxxx6:0f'
config interface 'lan'
option ifname 'eth0.1'
option proto 'static'
option netmask '255.255.255.0'
option ip6assign '60'
option ipaddr '192.168.1.1'
config device 'wan_eth0_2_dev'
option name 'eth0.2'
option macaddr 'xxxxxx:10'
config interface 'wan'
option ifname 'eth0.2'
option proto 'pppoe'
option password 'blah'
option ipv6 'auto'
option username 'blah'
config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'
config switch_vlan
option device 'switch0'
option vlan '1'
option ports '1 2 3 4 6t'
config switch_vlan
option device 'switch0'
option vlan '2'
option ports '0 6t'
config interface 'guest'
option ifname 'veth4'
option proto 'static'
option netmask '255.255.255.0'
option ip6assign '60'
option ipaddr '192.168.3.1'
Changes: LAN interface (originally br-lan
) is now directly eth0.1
. Interface GUEST now uses veth4
virtuall ethernet port.
/etc/config/firewall
:
config defaults
option input 'ACCEPT'
option output 'ACCEPT'
option forward 'REJECT'
option synflood_protect '1'
config zone 'lan'
option name 'lan'
option output 'ACCEPT'
option network 'lan'
option input 'ACCEPT'
option forward 'REJECT'
config zone 'wan'
option name 'wan'
option input 'REJECT'
option output 'ACCEPT'
option forward 'REJECT'
option masq '1'
option mtu_fix '1'
option network 'wan'
config forwarding
option src 'lan'
option dest 'wan'
config rule
option name 'Allow-DHCP-Renew'
option src 'wan'
option proto 'udp'
option dest_port '68'
option target 'ACCEPT'
option family 'ipv4'
config rule
option name 'Allow-Ping'
option src 'wan'
option proto 'icmp'
option icmp_type 'echo-request'
option family 'ipv4'
option target 'ACCEPT'
config rule
option name 'Allow-IGMP'
option src 'wan'
option proto 'igmp'
option family 'ipv4'
option target 'ACCEPT'
config rule
option name 'Allow-DHCPv6'
option src 'wan'
option proto 'udp'
option src_ip 'fc00::/6'
option dest_ip 'fc00::/6'
option dest_port '546'
option family 'ipv6'
option target 'ACCEPT'
config rule
option name 'Allow-MLD'
option src 'wan'
option proto 'icmp'
option src_ip 'fe80::/10'
list icmp_type '130/0'
list icmp_type '131/0'
list icmp_type '132/0'
list icmp_type '143/0'
option family 'ipv6'
option target 'ACCEPT'
config rule
option name 'Allow-ICMPv6-Input'
option src 'wan'
option proto 'icmp'
list icmp_type 'echo-request'
list icmp_type 'echo-reply'
list icmp_type 'destination-unreachable'
list icmp_type 'packet-too-big'
list icmp_type 'time-exceeded'
list icmp_type 'bad-header'
list icmp_type 'unknown-header-type'
list icmp_type 'router-solicitation'
list icmp_type 'neighbour-solicitation'
list icmp_type 'router-advertisement'
list icmp_type 'neighbour-advertisement'
option limit '1000/sec'
option family 'ipv6'
option target 'ACCEPT'
config rule
option name 'Allow-ICMPv6-Forward'
option src 'wan'
option dest '*'
option proto 'icmp'
list icmp_type 'echo-request'
list icmp_type 'echo-reply'
list icmp_type 'destination-unreachable'
list icmp_type 'packet-too-big'
list icmp_type 'time-exceeded'
list icmp_type 'bad-header'
list icmp_type 'unknown-header-type'
option limit '1000/sec'
option family 'ipv6'
option target 'ACCEPT'
config rule
option name 'Allow-IPSec-ESP'
option src 'wan'
option dest 'lan'
option proto 'esp'
option target 'ACCEPT'
config rule
option name 'Allow-ISAKMP'
option src 'wan'
option dest 'lan'
option dest_port '500'
option proto 'udp'
option target 'ACCEPT'
config include
option path '/etc/firewall.user'
config include 'miniupnpd'
option type 'script'
option path '/usr/share/miniupnpd/firewall.include'
option family 'any'
option reload '1'
config rule 'wg'
option name 'Allow-WireGuard'
option src 'wan'
option dest_port '51820'
option proto 'udp'
option target 'ACCEPT'
config zone 'guest'
option name 'guest'
option output 'ACCEPT'
option forward 'REJECT'
option input 'ACCEPT'
option network 'guest'
config forwarding 'guest_wan'
option src 'guest'
option dest 'wan'
config rule 'guest_dns'
option name 'Allow-DNS-Guest'
option src 'guest'
option dest_port '53'
option proto 'tcp udp'
option target 'ACCEPT'
config forwarding
option dest 'guest'
option src 'lan'
config rule
option target 'ACCEPT'
list proto 'icmp'
option name 'Allow-ping-Guest'
option src 'guest'
config rule
option src 'guest'
option name 'Block-GUEST-LAN'
option dest 'lan'
option target 'DROP'
list proto 'all'
I've made the last rule to avoid weird messages on ping.
/etc/config/dhcp
:
config dnsmasq
option domainneeded '1'
option boguspriv '1'
option filterwin2k '0'
option localise_queries '1'
option rebind_protection '1'
option rebind_localhost '1'
option local '/lan/'
option domain 'lan'
option expandhosts '1'
option nonegcache '0'
option authoritative '1'
option readethers '1'
option leasefile '/tmp/dhcp.leases'
option resolvfile '/tmp/resolv.conf.auto'
option nonwildcard '1'
option localservice '1'
config dhcp 'lan'
option interface 'lan'
option start '100'
option limit '150'
option leasetime '12h'
option dhcpv6 'server'
option ra 'server'
option ra_management '1'
config dhcp 'wan'
option interface 'wan'
option ignore '1'
config odhcpd 'odhcpd'
option maindhcp '0'
option leasefile '/tmp/hosts/odhcpd'
option leasetrigger '/usr/sbin/odhcpd-update'
option loglevel '4'
config domain
option name 'router'
option ip '192.168.1.1'
config dhcp 'guest'
option interface 'guest'
option ra_management '1'
option ra 'server'
option dhcpv6 'server'
option ignore '1'
DHCP is disabled on GUEST network (virtual NIC and subnet).
lastly it's necessary to set-up the virtual macvlan interface outside /etc/config/network
(I tried to bring it up from inside, to no avail). Here is /etc/rc.local
file:
# Put your custom commands here that should be executed once
# the system init finished. By default this file does nothing.
ip link add link eth0.1 veth4 type macvlan
exit 0
Everything works as expected, with IPv6 too.
But I would like to thank you a lot for throwing light to some issues that arises when mixing traffic of two (or more) subnets on the same NIC. Broadcast, unicast, mDNS, arp-scan, DHCP... all of them may not work properly. On my special case when I'm planning three subnets - LAN, home automation and work (in this thread called GUEST) - it can be worst.
The drawback is the virtualized server (an Intel NUC box), with just one ethernet port. My solution seems to work with this port constrain, but is (very) ugly an insecure. I'm tempted to buy two USB3 ethernet dongles to connect NUC to three subnets, with three VLANs directly to three available ports on the router.
Cheers!