Internet doesn't work when the zerotier service is running

brink · June 20, 2023, 4:43pm

I’m on a raspberry pi 4 using Raspian OS: when zerotier is up I can’t ping anything outside the local network. When the service is disabled everything works normally and I can ping outside my network.

AndrewZ · June 20, 2023, 5:42pm

Show your routing table (from RPi).

brink · June 20, 2023, 8:56pm

ip route
default dev ztuzev6bkp scope link
default via 192.168.68.1 dev wlan0 src 192.168.68.80 metric 303
10.147.17.0/24 dev ztuzev6bkp proto kernel scope link src 10.147.17.41
169.254.0.0/16 dev ztuzev6bkp proto kernel scope link src 169.254.74.198
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown
172.18.0.0/16 dev br-1a270539dc6c proto kernel scope link src 172.18.0.1 linkdown
192.168.68.0/24 dev wlan0 proto dhcp scope link src 192.168.68.80 metric 303

AndrewZ · June 20, 2023, 8:58pm

That is the answer. Is this intended?

brink · June 20, 2023, 9:27pm

Absolutely not. I don’t even know what it even means.
How do I change that?

zt-travis · June 23, 2023, 4:53pm

I don’t think the zerotier service is doing that. Did you change the network manager from whatever the default in raspbian is?

brink · June 23, 2023, 6:55pm

I didn’t change that.

This is the default route while the zerotier service is disabled

ip route
default via 192.168.68.1 dev wlan0 src 192.168.68.80 metric 303
10.147.17.0/24 dev ztuzev6bkp proto kernel scope link src 10.147.17.41
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown
172.18.0.0/16 dev br-1a270539dc6c proto kernel scope link src 172.18.0.1 linkdown
192.168.68.0/24 dev wlan0 proto dhcp scope link src 192.168.68.80 metric 303

zt-travis · June 23, 2023, 9:41pm

ZeroTier doesn’t add routes like that. Something else must be doing it.

169.254.0.0/16 dev ztuzev6bkp proto kernel scope link src 169.254.74.198 isn’t normal either.
Something is trying to do dhcp on the zerotier interface. Another user that was having similar trouble found that it was conman that was causing it.

github.com/zerotier/ZeroTierOne

ZeroTier overrides default route without being configured to

opened 10:20PM - 13 May 23 UTC

TanyaEleventhGoddess

Happening on: zerotier-one 1.10.6 debian package What I expect: ZeroTier only… generates an interface on my machine with the subnet I specified on my account What I get (`route -n` output): ```Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 0.0.0.0 255.255.255.255 UH 0 0 0 zt2lr7xjrf 0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 zt2lr7xjrf 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 zt2lr7xjrf 192.168.1.0 0.0.0.0 255.255.255.0 U 600 0 0 wlan0 192.168.1.0 0.0.0.0 255.255.255.0 U 3003 0 0 wlan0 192.168.1.1 0.0.0.0 255.255.255.255 UH 0 0 0 wlan0 192.168.80.0 0.0.0.0 255.255.255.0 U 0 0 0 zt2lr7xjrf ``` I should ONLY see the last route pointing to the subnet specified on my account - Why did it delete my default route directing the traffic on `wlan0`? - Why did it set a default route for his interface? - What's that weird subnet I never specified anywhere (`169.254.0.0`) coming up under the global one generated by zerotier?

brink · June 24, 2023, 9:57am

I disabled connman service and now everything works

This was the service status

● connman.service - Connection service
     Loaded: loaded (/lib/systemd/system/connman.service; enabled; vendor preset: enabled)
     Active: active (running) since Tue 2023-06-20 18:17:06 CEST; 3 days ago
   Main PID: 362 (connmand)
      Tasks: 1 (limit: 3594)
        CPU: 22.299s
     CGroup: /system.slice/connman.service
             └─362 /usr/sbin/connmand -n

giu 24 11:49:09 server connmand[362]: Removing default interface route failed (No such device)
giu 24 11:49:09 server connmand[362]: Removing default interface route failed (No such device)
giu 24 11:49:09 server connmand[362]: (null) {del} route fe80:: gw :: scope 0 <UNIVERSE>
giu 24 11:49:09 server connmand[362]: (null) {del} address 10.147.17.41/24 label ztuzev6bkp
giu 24 11:49:09 server connmand[362]: (null) {del} address 169.254.134.76/16 label ztuzev6bkp
giu 24 11:49:09 server connmand[362]: ztuzev6bkp {dellink} index 11 operstate 2 <DOWN>
giu 24 11:49:09 server connmand[362]: (null) {RX} 0 packets 0 bytes
giu 24 11:49:09 server connmand[362]: (null) {TX} 1364 packets 81235 bytes
giu 24 11:49:09 server connmand[362]: (null) {remove} index 11
giu 24 11:49:09 server connmand[362]: Remove interface (null) [ ethernet ]

system · July 24, 2023, 9:58am

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