Messages in this thread | | | Date | Mon, 12 Oct 2009 23:50:13 +0200 | From | lkml@makubi ... | Subject | Re: DHCP and iptables |
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Well, I just looked for "ethernet protocol" and read some things about DHCP again.
What's an ethernet protocol?
I also read, that "DHCP is built directly on UDP and IP" (RFC 2131).
It uses Ports (UDP 67/68) and the source address of the DHCP server is an IP address.
Could you answer me more in detail, why I get an IP, but block everything with iptables?
Sincerely yours Mathias Kub
-------------------- 12.10.2009 Mathias Kub <lkml@makubi.at>
| Thank you very much for that quick reply. | | Yours Mathias Kub | | -------------------- | 12.10.2009 Arnd Bergmann <arndbergmann@googlemail.com> | | | On Monday 12 October 2009, lkml@makubi.at wrote: | | > The last few days I have been wondering about the fact, that I get | | > an IP address via | | > DHCP if all chains at iptables are set to drop and no accept rules | | > set. | | > | | > Does this happen on purpose? | | | | DHCP is an ethernet protocol, not an IP protocol, so you have to use | | ebtables instead of iptables to filter it. | | | | Arnd <>< | | -- | To unsubscribe from this list: send the line "unsubscribe linux-kernel" | in the body of a message to majordomo@vger.kernel.org | More majordomo info at http://vger.kernel.org/majordomo-info.html | Please read the FAQ at http://www.tux.org/lkml/ |
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