Able to nslookup .local address but Unable to ping

[AnnAngela]

Windows Version

Microsoft Windows [Version 10.0.19045.4780]

WSL Version

2.3.24.0

Are you using WSL 1 or WSL 2?

• WSL 2
• WSL 1

Kernel Version

Linux version 5.15.153.1-microsoft-standard-WSL2 (root@941d701f84f1) (gcc (GCC) 11.2.0, GNU ld (GNU Binutils) 2.37) #1 SMP Fri Mar 29 23:14:13 UTC 2024

Distro Version

Ubuntu 24.04

Other Software

No response

Repro Steps

Assume the hostname is foo.

After upgrading Ubuntu from 22.04.5 to 24.04.1:

1. ping foo.local in wsl

Expected Behavior

should ping IP like 172.18.160.1

Actual Behavior

$ ping foo.local -v
ping: sock4.fd: 3 (socktype: SOCK_RAW), sock6.fd: 4 (socktype: SOCK_RAW), hints.ai_family: AF_UNSPEC

ping: foo.local: Name or service not known

$ ping foo.local -v -4
ping: sock4.fd: 3 (socktype: SOCK_RAW), sock6.fd: -1 (socktype: 0), hints.ai_family: AF_INET

ping: foo.local: Name or service not known

$ ping foo.local -v -6
ping: sock4.fd: -1 (socktype: 0), sock6.fd: 3 (socktype: SOCK_RAW), hints.ai_family: AF_INET6

ping: foo.local: Name or service not known

---

curl cannot use foo.local as proxy:

$ curl 'https://api.ipify.org?format=json'
curl: (5) Could not resolve proxy: foo.local

if removed https_proxy env, curl can visit internet:

$ export https_proxy=""

$ curl 'https://api.ipify.org?format=json'
* Uses proxy env variable no_proxy == 'foo.local,localhost,mirrors.cloud.tencent.com'
* Host api.ipify.org:443 was resolved.
* IPv6: (none)
* IPv4: 104.26.12.205
*   Trying 104.26.12.205...
* Connected to api.ipify.org (104.26.12.205) port 443
* ALPN: curl offers h2,http/1.1
* TLSv1.3 (OUT), TLS handshake, Client hello (1):
*  CAfile: /etc/ssl/certs/ca-certificates.crt
*  CApath: /etc/ssl/certs
* TLSv1.3 (IN), TLS handshake, Server hello (2):
* TLSv1.3 (IN), TLS handshake, Encrypted Extensions (8):
* TLSv1.3 (IN), TLS handshake, Certificate (11):
* TLSv1.3 (IN), TLS handshake, CERT verify (15):
* TLSv1.3 (IN), TLS handshake, Finished (20):
* TLSv1.3 (OUT), TLS change cipher, Change cipher spec (1):
* TLSv1.3 (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / TLS_AES_256_GCM_SHA384 / X25519 / id-ecPublicKey
* ALPN: server accepted h2
* Server certificate:
*  subject: CN=ipify.org
*  start date: Sep 15 06:18:44 2024 GMT
*  expire date: Dec 14 06:18:43 2024 GMT
*  subjectAltName: host "api.ipify.org" matched cert's "*.ipify.org"
*  issuer: C=US; O=Google Trust Services; CN=WE1
*  SSL certificate verify ok.
*   Certificate level 0: Public key type EC/prime256v1 (256/128 Bits/secBits), signed using ecdsa-with-SHA256
*   Certificate level 1: Public key type EC/prime256v1 (256/128 Bits/secBits), signed using ecdsa-with-SHA384
*   Certificate level 2: Public key type EC/secp384r1 (384/192 Bits/secBits), signed using ecdsa-with-SHA384
* using HTTP/2
* [HTTP/2] [1] OPENED stream for https://api.ipify.org/?format=json
* [HTTP/2] [1] [:method: GET]
* [HTTP/2] [1] [:scheme: https]
* [HTTP/2] [1] [:authority: api.ipify.org]
* [HTTP/2] [1] [:path: /?format=json]
* [HTTP/2] [1] [user-agent: curl/8.5.0]
* [HTTP/2] [1] [accept: */*]
> GET /?format=json HTTP/2
> Host: api.ipify.org
> User-Agent: curl/8.5.0
> Accept: */*
>
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* TLSv1.3 (IN), TLS handshake, Newsession Ticket (4):
* old SSL session ID is stale, removing
< HTTP/2 200
< date: Fri, 01 Nov 2024 00:58:56 GMT
< content-type: application/json
< content-length: 24
< vary: Origin
< cf-cache-status: DYNAMIC
< server: cloudflare
< cf-ray: 8db7f0788bed84b2-HKG
<
* Connection #0 to host api.ipify.org left intact
{"ip":"***.***.***.***"}

---

But dig works fine:

$ dig foo.local

; <<>> DiG 9.18.28-0ubuntu0.24.04.1-Ubuntu <<>> foo.local
;; global options: +cmd
;; Got answer:
;; WARNING: .local is reserved for Multicast DNS
;; You are currently testing what happens when an mDNS query is leaked to DNS
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40653
;; flags: qr rd ad; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;foo.local.               IN      A

;; ANSWER SECTION:
foo.              0       IN      A       172.18.160.1
foo.              0       IN      A       172.18.176.1
foo.              0       IN      A       192.168.166.233
foo.              0       IN      A       169.254.242.21

;; Query time: 0 msec
;; SERVER: 172.18.160.1#53(172.18.160.1) (UDP)
;; WHEN: Thu Oct 31 16:25:54 CST 2024
;; MSG SIZE  rcvd: 106

nslookup too:

$ nslookup foo.local
;; Got recursion not available from 172.18.160.1
Server:         172.18.160.1
Address:        172.18.160.1#53

Non-authoritative answer:
Name:   foo
Address: 172.18.160.1
Name:   foo
Address: 172.18.176.1
Name:   foo
Address: 192.168.166.233
Name:   foo
Address: 169.254.242.21
;; Got recursion not available from 172.18.160.1
Name:   foo
Address: fe80::ac52:a8c7:50a7:7374
Name:   foo
Address: fe80::1486:e7a8:3ccc:79a9

Diagnostic Logs

No response

[github-actions]

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View similar issues

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it!

Open similar issues:

• HOSTNAME.local: Name or service not known (#10077), similarity score: 0.76
• mDNS stopped working in WSL2 after Windows 11 Pro update (#11022), similarity score: 0.72

Closed similar issues:

• Cannot ping both from Windows host and WSL (#8462), similarity score: 0.73
• Networking mirrored (#10652), similarity score: 0.73
• .local names can only be resolved from wsl2 connected via Ethernet but not via WiFi (#5944), similarity score: 0.73

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[AnnAngela]

/emailed-logs

[github-actions]

Diagnostic information

Found '/emailed-logs', adding tag 'emailed-logs'

[alexvorobiev]

#11022 (comment) fixed mDNS in WSL2 for me.