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20 lines
884 B
Markdown
20 lines
884 B
Markdown
# Troubleshooting
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## Firewall
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Running DHCP or proxyDHCP with `poseidon/dnsmasq` on a host requires that the Firewall allow DHCP and TFTP (for chainloading) services to run.
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## Port collision
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Running DHCP or proxyDHCP can cause port already in use collisions depending on what's running. Fedora runs bootp listening on udp/67 for example. Find the service using the port.
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```sh
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$ sudo lsof -i :67
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```
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Evaluate whether you can configure the existing service or whether you'd like to stop it and test with `poseidon/dnsmasq`.
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## No boot filename received
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PXE client firmware did not receive a DHCP Offer with PXE-Options after several attempts. If you're using the `poseidon/dnsmasq` image with `-d`, each request should log to stdout. Using the wrong `-i` interface is the most common reason DHCP requests are not received. Otherwise, wireshark can be useful for investigating.
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