Unable to add IPv6 leak protection connection/interface

[numonedad]

trafficstars

Seeing this when trying to start on a headless Ubuntu

==> /home/drew/.cache/protonvpn/logs/protonvpn-cli.log <==
2021-10-01 13:25:55,232 — cli_wrapper.py — ERROR — connect:268 — Unable to add IPv6 leak protection connection/interface
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/protonvpn_cli/cli_wrapper.py", line 184, in connect
    protocol=protocol
  File "/usr/lib/python3/dist-packages/protonvpn_nm_lib/api.py", line 145, in setup_connection
    self._env.connection_backend.setup(**data)
  File "/usr/lib/python3/dist-packages/protonvpn_nm_lib/core/connection_backend/nm_client/nm_client.py", line 81, in setup
    self._pre_setup_connection(kwargs.get("entry_ip"))
  File "/usr/lib/python3/dist-packages/protonvpn_nm_lib/core/connection_backend/nm_client/nm_client.py", line 223, in _pre_setup_connection
    ipv6_lp.manage(KillSwitchActionEnum.ENABLE)
  File "/usr/lib/python3/dist-packages/protonvpn_nm_lib/core/killswitch/ipv6_leak_protection.py", line 62, in manage
    self.add_leak_protection()
  File "/usr/lib/python3/dist-packages/protonvpn_nm_lib/core/killswitch/ipv6_leak_protection.py", line 103, in add_leak_protection
    subprocess_command
  File "/usr/lib/python3/dist-packages/protonvpn_nm_lib/core/killswitch/ipv6_leak_protection.py", line 178, in run_subprocess
    raise exception(exception_msg)
protonvpn_nm_lib.exceptions.EnableIPv6LeakProtectionError: Unable to add IPv6 leak protection connection/interface
2021-10-01 13:27:09,167 — cli.py — INFO — __init__:27 —

[numonedad]

Found the answer here, you need permissions to modify network in dbus https://djangocas.dev/blog/linux/troubleshooting-protonvpn-EnableIPv6LeakProtectionError-Unable-to-add-IPv6-leak-protection-connection-interface/

apt-get install policykit-1-gnome

Create a file here

/etc/polkit-1/localauthority/50-local.d/org.freedesktop.NetworkManager.pkla, the content as below:

[nm-applet]
Identity=unix-user:<your username>
Action=org.freedesktop.NetworkManager.*
ResultAny=yes
ResultInactive=no
ResultActive=yes

Afterwards, connect was attempted even though it hangs forever and all egress traffic is blocked.

[NickDiMucci]

Having the same issue. Raspberry Pi OS in headless mode. I tried the solution above but as already noted, it just hangs when trying to connect. I've been waiting for awhile and it still hasn't connected.

[calexandru2018]

Hey, please check this comment here

[alexdibella]

Having the same issue on Ubuntu Server 20.04 with Proton VPN CLI v3.12.0 (protonvpn-nm-lib v3.11.0; proton-client v0.7.1). The solution suggested by @numonedad makes protonvpn-cli trying the connection, but hanging indefinitely

[WolfangAukang]

Having this issue on protonvpn-nm-lib 3.13.0, ProtonVPN CLI 3.12.0

-------------------------------------------------

-----------	Initialized protonvpn-cli	-----------

-------------------------------------------------
2022-09-19 22:34:03,208 — cli.py — INFO — __init__:29 — Proton VPN CLI v3.12.0 (protonvpn-nm-lib v3.13.0; proton-client v0.7.1)
2022-09-19 22:34:03,212 — cli.py — INFO — __init__:64 — CLI command: Namespace(command='c', version=False, help=False, get_logs=False)
2022-09-19 22:34:03,212 — cli.py — INFO — connect:128 — Options: Namespace(servername=None, fastest=False, random=False, cc=None, sc=False, p2p=False, tor=False, protocol=None, help=False)
2022-09-19 22:34:07,282 — cli_dialog.py — INFO — start:59 — Selected country: "Netherlands"
2022-09-19 22:34:09,450 — cli_dialog.py — INFO — start:63 — Selected server: "NL-FREE#126"
2022-09-19 22:34:10,226 — cli_dialog.py — INFO — start:67 — Selected protocol: "udp"
2022-09-19 22:34:12,094 — cli_wrapper.py — ERROR — connect:379 — Unable to add IPv6 leak protection connection/interface
Traceback (most recent call last):
  File "/nix/store/x4zgdzz3svhm4s150fhsm17mxd7gwrn4-protonvpn-cli-3.12.0/lib/python3.10/site-packages/protonvpn_cli/cli_wrapper.py", line 277, in connect
    self.protonvpn.setup_connection(
  File "/nix/store/8h1fwnyvkjv1xm37a9qb8xs0acmq8ig0-python3.9-protonvpn-nm-lib-3.13.0/lib/python3.9/site-packages/protonvpn_nm_lib/api.py", line 158, in setup_connection
    self._env.connection_backend.setup(**data)
  File "/nix/store/8h1fwnyvkjv1xm37a9qb8xs0acmq8ig0-python3.9-protonvpn-nm-lib-3.13.0/lib/python3.9/site-packages/protonvpn_nm_lib/core/connection_backend/nm_client/nm_client.py", line 81, in setup
    self._pre_setup_connection(kwargs.get("entry_ip"))
  File "/nix/store/8h1fwnyvkjv1xm37a9qb8xs0acmq8ig0-python3.9-protonvpn-nm-lib-3.13.0/lib/python3.9/site-packages/protonvpn_nm_lib/core/connection_backend/nm_client/nm_client.py", line 233, in _pre_setup_connection
    ipv6_lp.manage(KillSwitchActionEnum.ENABLE)
  File "/nix/store/8h1fwnyvkjv1xm37a9qb8xs0acmq8ig0-python3.9-protonvpn-nm-lib-3.13.0/lib/python3.9/site-packages/protonvpn_nm_lib/core/killswitch/ipv6_leak_protection.py", line 62, in manage
    self.add_leak_protection()
  File "/nix/store/8h1fwnyvkjv1xm37a9qb8xs0acmq8ig0-python3.9-protonvpn-nm-lib-3.13.0/lib/python3.9/site-packages/protonvpn_nm_lib/core/killswitch/ipv6_leak_protection.py", line 100, in add_leak_protection
    self.run_subprocess(
  File "/nix/store/8h1fwnyvkjv1xm37a9qb8xs0acmq8ig0-python3.9-protonvpn-nm-lib-3.13.0/lib/python3.9/site-packages/protonvpn_nm_lib/core/killswitch/ipv6_leak_protection.py", line 178, in run_subprocess
    raise exception(exception_msg)
protonvpn_nm_lib.exceptions.EnableIPv6LeakProtectionError: Unable to add IPv6 leak protection connection/interface