Really looking for some help/answers to some DNS resolution issues I've been seeing - I've been trying to troubleshoot this for two days now and it's driving me crazy.
I have a completely fresh install of proxmox, but it can't access the internet - I noticed when scripts weren't working. When I try to ping github.com for example (same for facebook.com, google.com, etc), I get
Here's /etc/resolv.conf:
Here's hosts:
I have Adguard Home set up as my DNS server on an OpenWRT router at 192.168.1.1 listening on port 53. I don't believe AGH/my router are the issues here because no other machine/device connected to the internet has any problems connecting to the internet. The weird thing is that I've confirmed that AGH seems to be seeing and responding to the DNS queries, but they just aren't getting returned to proxmox - all the pings do come through in the AGH logs and show as processed.
Proxmox can ping 192.168.1.1 directly:
It can also ping other public DNS servers:
It can also ping github's IP address (140.82.116.3) directly!
nslookup, dig, and getent hosts also appear to work correctly:
I also don't have any firewall rules impacting port 53. I've tried disabling IPv6 to see if that was the issue (it wasn't). I've tried googling and it does seem like there are other people who have had this issue, but I didn't find a way to resolve it other than just to use a different DNS server - which yes, does work. The only way I've been able to get it to connect has been to create a port forwarding exception that allows proxmox to bypass AGH and reach an external DNS server (e.g., 1.1.1.1 or 9.9.9.9 etc). I get that I could leave it at that, but I'd really like to understand why this is happening.
Anyways, I've been tearing my hair out over this for what feels like forever at this point. If anybody can save me I'd really appreciate it.
I have a completely fresh install of proxmox, but it can't access the internet - I noticed when scripts weren't working. When I try to ping github.com for example (same for facebook.com, google.com, etc), I get
ping: github.com: Temporary failure in name resolutionHere's /etc/resolv.conf:
Code:
search lan
nameserver 192.168.1.1Here's hosts:
Code:
127.0.0.1 localhost.localdomain localhost
192.168.1.7 pve.lan pve
# 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
ff02::3 ip6-allhostsProxmox can ping 192.168.1.1 directly:
Code:
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
64 bytes from 192.168.1.1: icmp_seq=1 ttl=64 time=0.900 ms
64 bytes from 192.168.1.1: icmp_seq=2 ttl=64 time=1.28 ms
64 bytes from 192.168.1.1: icmp_seq=3 ttl=64 time=0.893 ms
64 bytes from 192.168.1.1: icmp_seq=4 ttl=64 time=0.777 ms
Code:
PING 1.1.1.1 (1.1.1.1) 56(84) bytes of data.
64 bytes from 1.1.1.1: icmp_seq=1 ttl=57 time=13.5 ms
64 bytes from 1.1.1.1: icmp_seq=2 ttl=57 time=13.3 ms
64 bytes from 1.1.1.1: icmp_seq=3 ttl=57 time=12.4 ms
64 bytes from 1.1.1.1: icmp_seq=4 ttl=57 time=12.7 ms
Code:
PING 140.82.116.3 (140.82.116.3) 56(84) bytes of data.
64 bytes from 140.82.116.3: icmp_seq=1 ttl=55 time=37.6 ms
64 bytes from 140.82.116.3: icmp_seq=2 ttl=55 time=37.6 ms
64 bytes from 140.82.116.3: icmp_seq=3 ttl=55 time=37.6 ms
64 bytes from 140.82.116.3: icmp_seq=4 ttl=55 time=37.3 ms
Code:
nslookup github.com
Server: 192.168.1.1
Address: 192.168.1.1#53
Non-authoritative answer:
Name: github.com
Address: 140.82.116.4
--------------------------
; <<>> DiG 9.18.33-1~deb12u2-Debian <<>> github.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16621
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
;; QUESTION SECTION:
;github.com. IN A
;; ANSWER SECTION:
github.com. 43 IN A 140.82.116.3
;; Query time: 21 msec
;; SERVER: 192.168.1.1#53(192.168.1.1) (UDP)
;; WHEN: Sun Mar 23 01:41:40 MST 2025
;; MSG SIZE rcvd: 55
--------------------------
getent hosts github.com
140.82.116.3 github.comAnyways, I've been tearing my hair out over this for what feels like forever at this point. If anybody can save me I'd really appreciate it.
