Help: Server LAN access with container 3x-ui

[janusn]

I failed to get a client accessing the LAN of the XRAY server. It has no problem to the rest of the world.

The XRAY server is installed by Docker container 3x-ui.
The routing object (The api rules is set by 3x-ui and cannot be removed):

  "routing": {
    "domainStrategy": "IPIfNonMatch",
    "rules": [
      {
        "inboundTag": [
          "api"
        ],
        "outboundTag": "api",
        "type": "field"
      },
      {
        "ip": [
          "geoip:private"
        ],
        "outboundTag": "direct",
        "type": "field"
      }
    ]
  },

when I try to nslookup in the client:

$ nslookup example.com
;; Got recursion not available from 10.43.0.10
;; Got recursion not available from 10.43.0.10
;; Got recursion not available from 10.43.0.10
Server:		10.43.0.10
Address:	10.43.0.10#53

** server can't find example.com: NXDOMAIN
$ nslookup google.com
;; Got recursion not available from 10.43.0.10
;; Got recursion not available from 10.43.0.10
;; Got recursion not available from 10.43.0.10
Server:		10.43.0.10
Address:	10.43.0.10#53

Non-authoritative answer:
Name:	google.com
Address: 142.251.14.100
Name:	google.com
Address: 142.251.14.113
Name:	google.com
Address: 142.251.14.101
Name:	google.com
Address: 142.251.14.138
Name:	google.com
Address: 142.251.14.102
Name:	google.com
Address: 142.251.14.139
Name:	google.com
Address: 2a00:1450:4001:c0f::64
Name:	google.com
Address: 2a00:1450:4001:c0f::8b
Name:	google.com
Address: 2a00:1450:4001:c0f::71
Name:	google.com
Address: 2a00:1450:4001:c0f::65

The same command works in the container:

$ nslookup example.com
Server:		127.0.0.11
Address:	127.0.0.11:53

Name:	example.com
Address: ::

Name:	example.com
Address: 10.27.0.202
Name:	example.com
Address: 10.27.0.194

Environment:

• Container: ghcr.io/mhsanaei/3x-ui:3.3.0
• xray version: 26.6.1
• Host OS: TrueNAS SCALE community-edition: 25.10.4 - Goldeye

Any pointer? Many thanks.