/etc/systemd/system/network-mirrored.service

network-mirrored.service

[Unit]
Wants=network-pre.target
Before=network-pre.target shutdown.target

[Service]
User=root
ExecStart=/bin/sh -ec '\
  [ -x /usr/bin/wslinfo ] && [ "$(/usr/bin/wslinfo --networking-mode)" = "mirrored" ] || exit 0;\
  echo "\
  add chain   ip nat WSLPREROUTING { type nat hook prerouting priority dstnat - 1; policy accept; };\
  insert rule ip nat WSLPREROUTING iif loopback0  ip daddr 127.0.0.1 counter dnat to 127.0.0.1 comment mirrored;\
  "|nft -f -\
'
ExecStop=/bin/sh -ec '\
  [ -x /usr/bin/wslinfo ] && [ "$(/usr/bin/wslinfo --networking-mode)" = "mirrored" ] || exit 0;\
  for chain in "ip nat WSLPREROUTING";\
  do\
    handle=$(nft -a list chain $chain | sed -En "s/^.*comment \\"mirrored\\" # handle ([0-9]+)$/\\1/p");\
    for n in $handle; do echo "delete rule $chain handle $n"; done;\
  done|nft -f -\
'
RemainAfterExit=yes
[Install]
WantedBy=multi-user.target

root@xxx:~# hostname -i
127.0.1.1
root@xxx:~# hostname -I
10.0.0.147 172.18.0.1 172.17.0.1
root@xxx:~# cat /etc/hosts
# This file was automatically generated by WSL. To stop automatic generation of this file, add the following entry to /etc/wsl.conf:
# [network]
# generateHosts = false
127.0.0.1       localhost
127.0.1.1       myhost.  myhost

# The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
root@xxx:~# cat /etc/resolv.conf
# This file was automatically generated by WSL. To stop automatic generation of this file, add the following entry to /etc/wsl.conf:
# [network]
# generateResolvConf = false
nameserver 10.255.255.254
search lan
root@earth:~# ifconfig
br-9154cb03c575: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.18.0.1  netmask 255.255.0.0  broadcast 172.18.255.255
        ether 02:42:8e:9e:16:1f  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2  bytes 180 (180.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

docker0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.17.0.1  netmask 255.255.0.0  broadcast 172.17.255.255
        ether 02:42:84:ec:9d:e5  txqueuelen 0  (Ethernet)
        RX packets 740  bytes 2556700 (2.5 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 544  bytes 40789 (40.7 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 10.0.0.147  netmask 255.255.255.0  broadcast 10.0.0.255
        inet6 fe80::23e5:f7e7:e75f:b020  prefixlen 64  scopeid 0x20<link>
        ether d8:43:ae:24:60:63  txqueuelen 1000  (Ethernet)
        RX packets 1018  bytes 290244 (290.2 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 900  bytes 2591782 (2.5 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 71  bytes 5170 (5.1 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 71  bytes 5170 (5.1 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

loopback0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 00:15:5d:f1:17:2c  txqueuelen 1000  (Ethernet)
        RX packets 140  bytes 10220 (10.2 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 109  bytes 6366 (6.3 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

veth2195c28: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 7e:35:1f:a8:90:b9  txqueuelen 0  (Ethernet)
        RX packets 740  bytes 2567060 (2.5 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 544  bytes 40789 (40.7 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

vethd16839b: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        ether 6e:6e:0d:17:4f:04  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 2  bytes 180 (180.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

I have turned off all firewalls, including Hyper-V. Then I found that the problem should be that the port between wsl2 and the host in mirrored network mode cannot communicate. I looked for some related network configuration. I'm not sure if there's something wrong with that.

Anyway, thank you very much. It is indeed not a problem with network-mirrored.service. I think I need to find other related issues

@KingOfGitH
when configuring network settings such as NetworkManager on Linux, wsl may not be able to communicate, but i do not see anything wrong with the information provided.
send logs to https://github.com/microsoft/WSL/issues and microsoft may be able to provide a solution.

you can try it.

$ sudo systemctl --now enable network-mirrored

Very grateful for this, spent countless hours trying to figure it out, no amount of gpt could save me.

this script is no longer needed.

please use Docker 27.3.0 or later.