Bad argument `eth0' openvpn after update

[JLX89]

Is anyone else getting a "Bad argument `eth0' openvpn" after updating OpenVPN with the IPv6 update?

[ApplegateR]

@girish

I getting this error...

[ApplegateR]

@ApplegateR updated automatically yesterday and it can't run it was not respond.

[JLX89]

@ApplegateR , we might want to spin this off into a support topic. @girish Can we get this split into a new topic?

[girish]

@ApplegateR @JLX89 Can you tell me which Ubuntu version you are on?

Also, I assume both of you are already on 7.2.1 ?

[ApplegateR]

@girish
Platform versionv7.2.1 (Ubuntu 20.04.4 LTS)

[girish]

@ApplegateR Does your server have IPv6 ?

Maybe the auto detection logic in the package is wrong. I did test all the combinations (ubuntu+ipv6 availability+iptables/nftables) but looks like I missed something.

[girish]

@ApplegateR Ah! Sorry, I know what the problem is. There is a bug in the update.

Can you please add this line in /app/data/openvpn.conf using the File manager:

server-ipv6 fd42:feed:feed:feed::/64

That should fix it. I will make a new package in the meantime.

[ApplegateR]

@girish it does fixed, thank you now I am testing to make sure.

[girish]

@ApplegateR Your IPv6 should also be hidden now (only if your server has IPv6 though). You can use https://www.whatismyip.com/ or https://www.iplocation.net/find-ip-address

[ApplegateR]

@girish alright going to test that

[ApplegateR]

@ApplegateR great work. My server disabled ipv6. And it still detected my phone tower ipv6 instead cloudron server was it because my cloudron disabled ipv6?

If I try switch to public on ipv6 I still get error this message

AddressUnable to detect IPv6.
API server (ipv6.api.cloudron.io) unreachable

[girish]

@ApplegateR said in Bad argument `eth0' openvpn after update:

If I try switch to public on ipv6 I still get error this message

Currently, the IPv6 detection is only done on the app startup. So, if you add/remove IPv6 on the fly, you have to restart the app.

[ApplegateR]

@girish okay it disabled and I did restart the app and I still get leak ipv6. So I guessing something configure is missing that bypass ipv6 I think.. but will look more into it

[girish]

@ApplegateR The openvpn.conf should have push "redirect-gateway def1 ipv6 bypass-dhcp" . If it does, then it's probably a client side thing. Are you on a Mac ? I only tested this the setting on linux.

[ApplegateR]

@girish i on phone galaxy but I notice my Linux wasn't show ipv6 which is working great.

[ApplegateR]

@ApplegateR

In openvpn.conf

push "redirect-gateway def1 bypass-dhcp"

Not showing ipv6 so I added second line below that. Let see test see if it works.

push "redirect-gateway def1 bypass-dhcp"
push "redirect-gateway def1 ipv6 bypass-dhcp"

[ApplegateR]

This post is deleted!

[ApplegateR]

@ApplegateR switch to data on my phone and it still get ipv6 however on wifi does not show ipv6

[JLX89]

@ApplegateR Thanks! Yes, the app will now start without issue, but it's not pushing the IPv6 address -- which isn't a huge issue for us at the moment.