wifi connected but unable to ping,etc

I'm running Debian 9.13 (stretch) on a Pinebook Pro. Wifi worked when I first installed it, but I didn't use the laptop for a few months.

Now, I'm connected to wifi, but I can't do anything.
- If I try to do

sudo apt update

I get

Failed to fetch...Temporary failure resolving...

.
- If I try to ping a URL such as google.com, I get

Temporary failure in name resolution.

- If I try to ping DNS such as 1.1.1.1, I get

ping: sendmsg: operation not permitted.

- If I ping my gateway (192.168.0.1) it does work.

/etc/resolvconf contains:

nameserver 1.1.1.1
nameserver 1.0.0.1
nameserver 8.8.8.8
nameserver 8.8.4.4

It was empty so I added these manually and they persist on reboot and NetworkManager restart.

I'm at a total loss as to how to resolve this. Any help appreciated.

iptables?

Add your routers IP to the nameservers list

Since the OP can ping the gateway but not the internet I am guessing there is no route. Post the output of the command

ip r

I also assume that other devices on your home network can connect like the Windows 10 computer you are using to post to this forum.

Originally Posted by Fearless Fred Add your routers IP to the nameservers list

Actually, make it FIRST in the nameservers list!

You shouldn't really have to add the nameservers to resolvconf as your dhcp server (usually your home router) should provide your laptop with the dns servers.

Following on the instructions from users michaelk & wpeckham, as the root user also please provide the output of:
1. ifconfig
2. nslookup www.linuxquestions.org 8.8.8.8
3. rfkill list
4. iptables -L

I've found these steps useful in diagnosing such issues:

Test with a wired connection to verify that the machine is capable of network connectivity.

Ping a known internet ip address, such as 8.8.8.8 (that's a Google ip). If that gets a response and ping google.com doesn't, you likely have a DNS issue.

Use the traceroute command to both local and internet addresses. That will give you some idea where the connection is breaking. See man traceroute for more.

If you can ping neither a local nor an internet address, I'd be suspicious that it may be an issue with the wireless card itself.

Just a few thoughts.

OP, please consider posts #6 and #7.
Additionally, there's no file called "/etc/resolvconf" - it's either "/etc/resolv.conf" or "/etc/resolvconf.conf".
But, as pointed out, neither should be required.

You can ping the gateway so the WiFi interface is good. If you have access to your gateway you should check if the gateway can access the Internet.

Best