[CentOS] UEFI and PXE

Fri Apr 26 00:46:11 UTC 2019
Chris Adams <linux at cmadams.net>

Once upon a time, Steven Tardy <sjt5atra at gmail.com> said:
> The “ICMP unreachable” should be a dead giveaway. . .

You cut out the part of the email where the OP said that the UEFI system
was ignoring the next-server part of the DHCP reply and trying to TFTP
to the DHCP server instead of the TFTP server.  Of course that got ICMP
unreachable, but it isn't a firewall problem.

To the OP: can you post a full tcpdump decode of the DHCP offer?  I
seem to remember having some issue with ISC DHCP in the past not getting
the next server set correctly - maybe a packet will jog some memory (and
I'll go try to grab the same from my dnsmasq DHCP for comparison).

Chris Adams <linux at cmadams.net>