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reword it to be generic instead of focusing on netcup

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Laurence
2026-02-18 07:56:13 +00:00
parent 4ac01fecf9
commit fae58ba9fb
1 changed files with 1 additions and 5 deletions
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self-host/advanced/wild-card-domains.mdx
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@@ -255,12 +255,8 @@ Traefik supports most DNS providers. You can find a full list of supported provi
- Check API token permissions and scope
- Ensure DNS propagation has completed
- Review provider-specific configuration
- If your DNS provider has a firewall in place, ensure it allows incoming DNS traffic (typically UDP on port **53**). Adding an ingress rule to permit such traffic may help resolve the issue, especially if the firewall is stateless.
<Info>
**Known issue with Netcup**: DNS-01 can fail on Netcup due to how their provider firewall handles UDP. DNS replies may be treated as inbound traffic **from source port `53`** and get dropped.
**Workaround**: Allow **ingress UDP** with **source port `53`** (to your server's UDP ports, or `ANY`). Repeat this for other UDP-based services if needed.
</Info>
</Accordion>
<Accordion title="Old certificates still being used">