Spitz says "No internet connection"

Since a few days ago, my spitz no longer connects to the internet (via Modem/4G). Well, the modem does connect and does get an IP-address, but there is no connection, and if I try ping (logged in as root to busybox), I get:

root@spitz:~# ping
PING ( 56 data bytes
ping: sendto: Operation not permitted

Doing ifconfig does show it has gotten an IP address from my provider:

wwan0     Link encap:Ethernet  HWaddr 3A:13:9B:85:5B:57  
          inet addr:  Bcast:  Mask:
          inet6 addr: fe80::3813:9bff:fe85:5b57/64 Scope:Link
          RX packets:207 errors:0 dropped:0 overruns:0 frame:0
          TX packets:473 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:15626 (15.2 KiB)  TX bytes:38416 (37.5 KiB)

and interestingly also shows some packages have been sent back/forth. Replacing the SIM card with another one does not help, reboot also not. I should add that it has been running 24/7 for weeks without problems and that I do have the hardware fix (removal of capacitor) done.

stupid question: does your SIM’s data plan need to be charged?

Stupid questions don’t exist! However, the answer is no, and I can happily use the same SIM in another device. My fear is that either there is a hardware failure.

OK, the error was mine. I had a semi configured guest network, that was done wrong and which for whatever reason had added a default route going to nowhere.

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