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Hetzner & Google IPv6

From time to time Hetzner seems to have problems with IPv6 routing to Google so these are ways you can work around that problem.

Disable IPv6 Temporarily

sudo sysctl -w net.ipv6.conf.all.disable_ipv6=1
sudo sysctl -w net.ipv6.conf.default.disable_ipv6=1
sudo sysctl -w net.ipv6.conf.lo.disable_ipv6=1

Disable IPv6 permanently

Add the following to /etc/sysctl.conf

net.ipv6.conf.all.disable_ipv6=1
net.ipv6.conf.default.disable_ipv6=1
net.ipv6.conf.lo.disable_ipv6=1

Then run

sudo sysctl -p

Alternately you can disable IPv6 using GRUB by editing /etc/default/grub and adding the following to GRUB_CMDLINE_LINUX_DEFAULT and GRUB_CMDLINE_LINUX

ipv6.disable=1

External resource: here

Make Rclone use IPv4

For the mount this is done by toggling ipv4_only in /srv/git/saltbox/adv_settings.yml like so:

mounts:
  remote: rclone_vfs
  ipv4_only: yes
  feeder: no

Then run

sb install mounts_override

For Cloudplow you could add something like:

            "rclone_extras": {
                "--user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36",
                "--checkers": 16,
                "--drive-chunk-size": "128M",
                "--stats": "60s",
                "--transfers": 8,
                "--verbose": 1,
                "--skip-links": null,
                "--retries": 1,
                "--low-level-retries": 2,
                "--drive-stop-on-upload-limit": null,
                "--bind": "<Insert Your WAN IP>"
            },

For crop you would add the following to the global params that you are utilizing:

- '--bind=<Insert Your WAN IP>'

After doing any changes to Cloudplow or crop configuration remember to restart their respective service.

Use a script to bind traffic to Google API endpoints to a specific IP

Setup this script and let it modify your hosts file.

Markschrik has created a version of the script that will do the required setup for you if you are using the default Saltbox setup; it can be found here. Download it, mark it executable, and run it.

wget https://raw.githubusercontent.com/markschrik/Saltbox-GoogleBandwith/main/bandwithtest.sh chmod +x bandwithtest.sh ./bandwithtest.sh

You can also add this to your crontab to execute it automatically.