Openwrt Proxmox NO LINK Issue

writzthecat · March 19, 2025, 8:35pm

Hey Guys,

at the moment i'm running a CWWK i5-1235U 6 Port router with Proxmox and OPNSense as router. As i recently switched for some MX5300 i wanted to go all OpenWrt and my main router aswell and installed OpenWrt onto Proxmox.

My Router has in total 6 Ethernet Ports and i have created for all of them bridges in Proxmox. During OpenWrt setup i was asked to assign the WAN (eth1) and the LAN Port (eth0), what i did,

OpenWrt is running so far, PPPOE Connection is working and im connected through the Lan port i defined during installation, but the other ports are not working. They are shown in OpenWrt but even if a connect a cable they are listed with NO LINK.

When i plug / unplug a cable in Proxmox i see the changed link state. In OpenWrt i can't see it. Also not in Kernel.

Any idea how to solve this issues ?

br

writzthecat · March 19, 2025, 8:51pm

/etc$ ubus call system board
{
	"kernel": "6.6.73",
	"hostname": "OpenWrt",
	"system": "Common KVM processor",
	"model": "QEMU Standard PC (i440FX + PIIX, 1996)",
	"board_name": "qemu-standard-pc-i440fx-piix-1996",
	"rootfs_type": "ext4",
	"release": {
		"distribution": "OpenWrt",
		"version": "24.10.0",
		"revision": "r28427-6df0e3d02a",
		"target": "x86/64",
		"description": "OpenWrt 24.10.0 r28427-6df0e3d02a",
		"builddate": "1738624177"
	}
}

writzthecat · March 19, 2025, 8:53pm

/etc$ cat /etc/config/network

config interface 'loopback'
	option device 'lo'
	option proto 'static'
	option ipaddr '127.0.0.1'
	option netmask '255.0.0.0'

config globals 'globals'
	option ula_prefix 'fdf7:24e9:b772::/48'
	option packet_steering '1'

config device
	option name 'br-lan'
	option type 'bridge'
	list ports 'eth0'
	list ports 'eth2'
	list ports 'eth3'
	list ports 'eth4'
	list ports 'eth5'

config dsl 'dsl'
	option annex 'b'
	option tone 'bv'
	option xfer_mode 'ptm'

config interface 'wan'
	option proto 'pppoe'
	option _orig_ifname 'ptm0'
	option _orig_bridge 'false'
	option username 'xxx'
	option passwort 'xxx'
	option ipv6 'auto'
	option device 'dsl0.7'

config interface 'lan'
	option device 'eth0'
	option proto 'static'
	option ipaddr '192.168.178.1'
	option netmask '255.255.255.0'

config device
	option type '8021q'
	option ifname 'eth1'
	option vid '7'
	option name 'dsl0.7'

writzthecat · March 19, 2025, 8:53pm

/etc$ cat /etc/config/firewall
config defaults
	option syn_flood	1
	option input		REJECT
	option output		ACCEPT
	option forward		REJECT
# Uncomment this line to disable ipv6 rules
#	option disable_ipv6	1

config zone
	option name		lan
	list   network		'lan'
	option input		ACCEPT
	option output		ACCEPT
	option forward		ACCEPT

config zone
	option name		wan
	list   network		'wan'
	list   network		'wan6'
	option input		REJECT
	option output		ACCEPT
	option forward		REJECT
	option masq		1
	option mtu_fix		1

config forwarding
	option src		lan
	option dest		wan

# We need to accept udp packets on port 68,
# see https://dev.openwrt.org/ticket/4108
config rule
	option name		Allow-DHCP-Renew
	option src		wan
	option proto		udp
	option dest_port	68
	option target		ACCEPT
	option family		ipv4

# Allow IPv4 ping
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

# Allow DHCPv6 replies
# see https://github.com/openwrt/openwrt/issues/5066
config rule
	option name		Allow-DHCPv6
	option src		wan
	option proto		udp
	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

# Allow essential incoming IPv6 ICMP traffic
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

# Allow essential forwarded IPv6 ICMP traffic
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


### EXAMPLE CONFIG SECTIONS
# do not allow a specific ip to access wan
#config rule
#	option src		lan
#	option src_ip	192.168.45.2
#	option dest		wan
#	option proto	tcp
#	option target	REJECT

# block a specific mac on wan
#config rule
#	option dest		wan
#	option src_mac	00:11:22:33:44:66
#	option target	REJECT

# block incoming ICMP traffic on a zone
#config rule
#	option src		lan
#	option proto	ICMP
#	option target	DROP

# port redirect port coming in on wan to lan
#config redirect
#	option src			wan
#	option src_dport	80
#	option dest			lan
#	option dest_ip		192.168.16.235
#	option dest_port	80
#	option proto		tcp

# port redirect of remapped ssh port (22001) on wan
#config redirect
#	option src		wan
#	option src_dport	22001
#	option dest		lan
#	option dest_port	22
#	option proto		tcp

### FULL CONFIG SECTIONS
#config rule
#	option src		lan
#	option src_ip	192.168.45.2
#	option src_mac	00:11:22:33:44:55
#	option src_port	80
#	option dest		wan
#	option dest_ip	194.25.2.129
#	option dest_port	120
#	option proto	tcp
#	option target	REJECT

#config redirect
#	option src		lan
#	option src_ip	192.168.45.2
#	option src_mac	00:11:22:33:44:55
#	option src_port		1024
#	option src_dport	80
#	option dest_ip	194.25.2.129
#	option dest_port	120
#	option proto	tcp

writzthecat · March 19, 2025, 8:59pm

writzthecat · March 19, 2025, 9:41pm

Oh Boy...solved it by mysef...LAN Interface was still linked only with ETH0 device. Now that i change it to the br-lan1 Bridge it's working

slh · March 20, 2025, 1:21am

OpenWrt normally sets that up by default for hardware it knows about, but it can't know about x86_64 (a single image for all devices, vastly different ones) - so there it can only do the simple thing:

configure the first seen port as lan
if there is a second port, configure that as wan
everything else is up to you to assign
(there are a few more advanced settings for a handfull of 'firewall PCs', e.g. Sophos, where their users have contributed detection mechanisms and sensible preconfigurations, but that isn't really a possibility for VM)

system · March 30, 2025, 1:21am

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