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docs(troubleshooting.md): add firewalld related docs (#403)
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@ -18,7 +18,7 @@ If you use `adguardhome`, `mosdns` in `dns` section, refer to [external-dns](con
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### Troubleshoot firewall
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If you bind to wan, make sure firewall is stopped or `12345` is allowed by firewall. Don't worry about the security of this port because this port has its own firewall rule.
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If you bind to wan, make sure firewall is stopped or mark `0x8000000` is allowed by firewall. Don't worry about the security of this port because this port has its own firewall rule.
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Usual firewalls on Linux:
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@ -27,6 +27,8 @@ ufw
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firewalld
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```
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#### ufw
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UFW users may need some extra steps to make sure `Binding to LAN` working.
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Such as adding as follows to `/etc/ufw/before*.rules`:
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@ -39,6 +41,14 @@ Such as adding as follows to `/etc/ufw/before*.rules`:
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-A ufw6-before-input -m mark --mark 0x8000000 -j ACCEPT
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```
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#### firewalld
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If you use firewalld, it is hard to add mark support. You have to execute following commands every time machine boot and firewall rule changes:
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```bash
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sudo nft 'insert rule inet firewalld filter_INPUT mark 0x8000000 accept'
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```
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### Troubleshoot PPPoE
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dae does not support PPPoE due to it is too complexity for a ebpf program. Binding to LAN for other machines should work fine. If you want to proxy the machine itself, see <<https://github.com/daeuniverse/dae/discussions/304>.
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