Discussion:
[Dnsmasq-discuss] dnsmasq proxy with uefi pxe not working
Louis Garcia
2015-11-17 19:48:08 UTC
Permalink
I have a dns proxy running on F23 and configured for older BIOS pxe and all
is working. On newer uefi I get a ip assigned and get to the "Press F8 for
the Menu." After that everything quits and returns to the bios. Here is
some info. If there are more debugging options let me know? I am running
dnsmasq-2.75 with a patch from Michael Kuron earlier on this list.


/etc/dnsmasq.conf

# Configuration file for dnsmasq:

# Turn on the debugging
log-dhcp

# Don't function as a DNS server
port=0

# kill multicast
dhcp-option=vendor:PXEClient,6,2b

# Disable re-use of the DHCP servername and filename fields as extra
# option space. That's to avoid confusing some old or broken DHCP clients.
dhcp-no-override

# This range(s) is for the public interface, where dnsmasq functions
# as a proxy DHCP server providing boot information but no IP leases.
# Any ip in the subnet will do, so you may just put your server NIC ip here.
dhcp-range=192.168.0.5,proxy

# Set the boot filename for netboot/PXE. You will only need this if you
want to
# boot machines over the network and you will need the built in TFTP server.

# BIOS PXE clients
dhcp-boot=pxelinux.0

# UEFI PXE clients
dhcp-match=set:efi-x86_64,option:client-arch,7
dhcp-boot=tag:efi-x86_64,uefi/shim.efi

#pxe-prompt="What system shall I netboot?", timeout before first available
action is taken:
pxe-prompt="Press F8 for the Menu.", 5

#Loads <tftp-root>/pxelinux.0 from dnsmasq TFTP server.
pxe-service=x86PC, "Install Fedora Workstation, (BIOS)", pxelinux

#Loads <tftp-root>/uefi/shim.efi from dnsmasq TFTP server.
pxe-service=X86-64_EFI, "Boot From Network, (UEFI)", uefi/shim.efi

# Enable dnsmasq's built-in TFTP server
enable-tftp

# Set the root directory for files available via FTP.
tftp-root=/srv/tftpboot


logs:

systemd[1]: Started DNS caching server..
dnsmasq[1897]: started, version 2.75 DNS disabled
systemd[1]: Starting DNS caching server....
dnsmasq[1897]: compile time options: IPv6 GNU-getopt DBus no-i18n IDN DHCP
DHCPv6 no-Lua TFTP no-conntrack ipset auth DNSSEC loop-detect inotify
dnsmasq-dhcp[1897]: DHCP, proxy on subnet 192.168.0.5
dnsmasq-tftp[1897]: TFTP root is /srv/tftpboot
dnsmasq-dhcp[1897]: 1005692705 available DHCP subnet:
192.168.0.5/255.255.255.0
dnsmasq-dhcp[1897]: 1005692705 vendor class:
PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 1005692705 PXE(enp0s25) b8:ae:ed:73:6f:9b proxy
dnsmasq-dhcp[1897]: 1005692705 tags: efi-x86_64, enp0s25
dnsmasq-dhcp[1897]: 1005692705 bootfile name: uefi/shim.efi
dnsmasq-dhcp[1897]: 1005692705 broadcast response
dnsmasq-dhcp[1897]: 1005692705 sent size: 1 option: 53 message-type 2
dnsmasq-dhcp[1897]: 1005692705 sent size: 4 option: 54 server-identifier
192.168.0.5
dnsmasq-dhcp[1897]: 1005692705 sent size: 9 option: 60 vendor-class
50:58:45:43:6c:69:65:6e:74
dnsmasq-dhcp[1897]: 1005692705 sent size: 17 option: 97 client-machine-id
00:00:3f:65:c8:77:72:e3:11:93:4d:b8:ae:ed...
dnsmasq-dhcp[1897]: 1005692705 available DHCP subnet:
192.168.0.5/255.255.255.0
dnsmasq-dhcp[1897]: 1005692705 vendor class:
PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 378552196 available DHCP subnet:
192.168.0.5/255.255.255.0
dnsmasq-dhcp[1897]: 378552196 vendor class: PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 378552196 PXE(enp0s25) b8:ae:ed:73:6f:9b proxy
dnsmasq-dhcp[1897]: 378552196 tags: efi-x86_64, enp0s25
dnsmasq-dhcp[1897]: 378552196 bootfile name: uefi/shim.efi
dnsmasq-dhcp[1897]: 378552196 sent size: 1 option: 53 message-type 5
dnsmasq-dhcp[1897]: 378552196 sent size: 4 option: 54 server-identifier
192.168.0.5
dnsmasq-dhcp[1897]: 378552196 sent size: 9 option: 60 vendor-class
50:58:45:43:6c:69:65:6e:74
dnsmasq-dhcp[1897]: 378552196 sent size: 17 option: 97 client-machine-id
00:00:3f:65:c8:77:72:e3:11:93:4d:b8:ae:ed...
dnsmasq-dhcp[1897]: 378552196 sent size: 38 option: 43 vendor-encap
06:01:08:0a:1d:05:50:72:65:73:73:20:46:38...
dnsmasq-dhcp[1897]: 1005692706 available DHCP subnet:
192.168.0.5/255.255.255.0
dnsmasq-dhcp[1897]: 1005692706 vendor class:
PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 1005692706 PXE(enp0s25) b8:ae:ed:73:6f:9b proxy
dnsmasq-dhcp[1897]: 1005692706 tags: efi-x86_64, enp0s25
dnsmasq-dhcp[1897]: 1005692706 bootfile name: uefi/shim.efi
dnsmasq-dhcp[1897]: 1005692706 broadcast response
dnsmasq-dhcp[1897]: 1005692706 sent size: 1 option: 53 message-type 2
dnsmasq-dhcp[1897]: 1005692706 sent size: 4 option: 54 server-identifier
192.168.0.5
dnsmasq-dhcp[1897]: 1005692706 sent size: 9 option: 60 vendor-class
50:58:45:43:6c:69:65:6e:74
dnsmasq-dhcp[1897]: 1005692706 sent size: 17 option: 97 client-machine-id
00:00:3f:65:c8:77:72:e3:11:93:4d:b8:ae:ed...
dnsmasq-dhcp[1897]: 1005692706 available DHCP subnet:
192.168.0.5/255.255.255.0
dnsmasq-dhcp[1897]: 1005692706 vendor class:
PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 735833248 available DHCP subnet:
192.168.0.5/255.255.255.0
dnsmasq-dhcp[1897]: 735833248 vendor class: PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 735833248 PXE(enp0s25) b8:ae:ed:73:6f:9b proxy
dnsmasq-dhcp[1897]: 735833248 tags: efi-x86_64, enp0s25
dnsmasq-dhcp[1897]: 735833248 bootfile name: uefi/shim.efi
dnsmasq-dhcp[1897]: 735833248 sent size: 1 option: 53 message-type 5
dnsmasq-dhcp[1897]: 735833248 sent size: 4 option: 54 server-identifier
192.168.0.5
dnsmasq-dhcp[1897]: 735833248 sent size: 9 option: 60 vendor-class
50:58:45:43:6c:69:65:6e:74
dnsmasq-dhcp[1897]: 735833248 sent size: 17 option: 97 client-machine-id
00:00:3f:65:c8:77:72:e3:11:93:4d:b8:ae:ed...
dnsmasq-dhcp[1897]: 735833248 sent size: 38 option: 43 vendor-encap
06:01:08:0a:1d:05:50:72:65:73:73:20:46:38...
Michael Kuron
2015-11-18 14:54:30 UTC
Permalink
In proxy mode, you can leave out the dhcp-boot lines. Also, note that some hardware incorrectly reports an architecture of 9 (BC_EFI) instead of 7 (X86-64_EFI), so in general you’ll need to have lines for both in your config.
I assume you’re using my patch from October 31st? The pxe-service line for EFI should not have a file extension, .efi is added automatically. Also, I’ve never needed dhcp-no-override or dhcp-option in proxy mode.

A Wireshark trace on UDP ports 67, 68, 69 and 4011 is generally the most useful thing to help you debug the issue. Check if the server address and file name are correctly sent to the client and make sure it requests the TFTP download correctly. The log output you sent looks fine.

Michael
I have a dns proxy running on F23 and configured for older BIOS pxe and all is working. On newer uefi I get a ip assigned and get to the "Press F8 for the Menu." After that everything quits and returns to the bios. Here is some info. If there are more debugging options let me know? I am running dnsmasq-2.75 with a patch from Michael Kuron earlier on this list.
/etc/dnsmasq.conf
# Turn on the debugging
log-dhcp
# Don't function as a DNS server
port=0
# kill multicast
dhcp-option=vendor:PXEClient,6,2b
# Disable re-use of the DHCP servername and filename fields as extra
# option space. That's to avoid confusing some old or broken DHCP clients.
dhcp-no-override
# This range(s) is for the public interface, where dnsmasq functions
# as a proxy DHCP server providing boot information but no IP leases.
# Any ip in the subnet will do, so you may just put your server NIC ip here.
dhcp-range=192.168.0.5,proxy
# Set the boot filename for netboot/PXE. You will only need this if you want to
# boot machines over the network and you will need the built in TFTP server.
# BIOS PXE clients
dhcp-boot=pxelinux.0
# UEFI PXE clients
dhcp-match=set:efi-x86_64,option:client-arch,7
dhcp-boot=tag:efi-x86_64,uefi/shim.efi
pxe-prompt="Press F8 for the Menu.", 5
#Loads <tftp-root>/pxelinux.0 from dnsmasq TFTP server.
pxe-service=x86PC, "Install Fedora Workstation, (BIOS)", pxelinux
#Loads <tftp-root>/uefi/shim.efi from dnsmasq TFTP server.
pxe-service=X86-64_EFI, "Boot From Network, (UEFI)", uefi/shim.efi
# Enable dnsmasq's built-in TFTP server
enable-tftp
# Set the root directory for files available via FTP.
tftp-root=/srv/tftpboot
systemd[1]: Started DNS caching server..
dnsmasq[1897]: started, version 2.75 DNS disabled
systemd[1]: Starting DNS caching server....
dnsmasq[1897]: compile time options: IPv6 GNU-getopt DBus no-i18n IDN DHCP DHCPv6 no-Lua TFTP no-conntrack ipset auth DNSSEC loop-detect inotify
dnsmasq-dhcp[1897]: DHCP, proxy on subnet 192.168.0.5
dnsmasq-tftp[1897]: TFTP root is /srv/tftpboot
dnsmasq-dhcp[1897]: 1005692705 available DHCP subnet: 192.168.0.5/255.255.255.0 <http://192.168.0.5/255.255.255.0>
dnsmasq-dhcp[1897]: 1005692705 vendor class: PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 1005692705 PXE(enp0s25) b8:ae:ed:73:6f:9b proxy
dnsmasq-dhcp[1897]: 1005692705 tags: efi-x86_64, enp0s25
dnsmasq-dhcp[1897]: 1005692705 bootfile name: uefi/shim.efi
dnsmasq-dhcp[1897]: 1005692705 broadcast response
dnsmasq-dhcp[1897]: 1005692705 sent size: 1 option: 53 message-type 2
dnsmasq-dhcp[1897]: 1005692705 sent size: 4 option: 54 server-identifier 192.168.0.5
dnsmasq-dhcp[1897]: 1005692705 sent size: 9 option: 60 vendor-class 50:58:45:43:6c:69:65:6e:74
dnsmasq-dhcp[1897]: 1005692705 sent size: 17 option: 97 client-machine-id 00:00:3f:65:c8:77:72:e3:11:93:4d:b8:ae:ed...
dnsmasq-dhcp[1897]: 1005692705 available DHCP subnet: 192.168.0.5/255.255.255.0 <http://192.168.0.5/255.255.255.0>
dnsmasq-dhcp[1897]: 1005692705 vendor class: PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 378552196 available DHCP subnet: 192.168.0.5/255.255.255.0 <http://192.168.0.5/255.255.255.0>
dnsmasq-dhcp[1897]: 378552196 vendor class: PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 378552196 PXE(enp0s25) b8:ae:ed:73:6f:9b proxy
dnsmasq-dhcp[1897]: 378552196 tags: efi-x86_64, enp0s25
dnsmasq-dhcp[1897]: 378552196 bootfile name: uefi/shim.efi
dnsmasq-dhcp[1897]: 378552196 sent size: 1 option: 53 message-type 5
dnsmasq-dhcp[1897]: 378552196 sent size: 4 option: 54 server-identifier 192.168.0.5
dnsmasq-dhcp[1897]: 378552196 sent size: 9 option: 60 vendor-class 50:58:45:43:6c:69:65:6e:74
dnsmasq-dhcp[1897]: 378552196 sent size: 17 option: 97 client-machine-id 00:00:3f:65:c8:77:72:e3:11:93:4d:b8:ae:ed...
dnsmasq-dhcp[1897]: 378552196 sent size: 38 option: 43 vendor-encap 06:01:08:0a:1d:05:50:72:65:73:73:20:46:38...
dnsmasq-dhcp[1897]: 1005692706 available DHCP subnet: 192.168.0.5/255.255.255.0 <http://192.168.0.5/255.255.255.0>
dnsmasq-dhcp[1897]: 1005692706 vendor class: PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 1005692706 PXE(enp0s25) b8:ae:ed:73:6f:9b proxy
dnsmasq-dhcp[1897]: 1005692706 tags: efi-x86_64, enp0s25
dnsmasq-dhcp[1897]: 1005692706 bootfile name: uefi/shim.efi
dnsmasq-dhcp[1897]: 1005692706 broadcast response
dnsmasq-dhcp[1897]: 1005692706 sent size: 1 option: 53 message-type 2
dnsmasq-dhcp[1897]: 1005692706 sent size: 4 option: 54 server-identifier 192.168.0.5
dnsmasq-dhcp[1897]: 1005692706 sent size: 9 option: 60 vendor-class 50:58:45:43:6c:69:65:6e:74
dnsmasq-dhcp[1897]: 1005692706 sent size: 17 option: 97 client-machine-id 00:00:3f:65:c8:77:72:e3:11:93:4d:b8:ae:ed...
dnsmasq-dhcp[1897]: 1005692706 available DHCP subnet: 192.168.0.5/255.255.255.0 <http://192.168.0.5/255.255.255.0>
dnsmasq-dhcp[1897]: 1005692706 vendor class: PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 735833248 available DHCP subnet: 192.168.0.5/255.255.255.0 <http://192.168.0.5/255.255.255.0>
dnsmasq-dhcp[1897]: 735833248 vendor class: PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 735833248 PXE(enp0s25) b8:ae:ed:73:6f:9b proxy
dnsmasq-dhcp[1897]: 735833248 tags: efi-x86_64, enp0s25
dnsmasq-dhcp[1897]: 735833248 bootfile name: uefi/shim.efi
dnsmasq-dhcp[1897]: 735833248 sent size: 1 option: 53 message-type 5
dnsmasq-dhcp[1897]: 735833248 sent size: 4 option: 54 server-identifier 192.168.0.5
dnsmasq-dhcp[1897]: 735833248 sent size: 9 option: 60 vendor-class 50:58:45:43:6c:69:65:6e:74
dnsmasq-dhcp[1897]: 735833248 sent size: 17 option: 97 client-machine-id 00:00:3f:65:c8:77:72:e3:11:93:4d:b8:ae:ed...
dnsmasq-dhcp[1897]: 735833248 sent size: 38 option: 43 vendor-encap 06:01:08:0a:1d:05:50:72:65:73:73:20:46:38...
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Louis Garcia
2015-11-18 18:39:09 UTC
Permalink
Thank you Michael. Now my uefi client can boot to a grub prompt. Though my
client did not accept shim.efi to boot it did accept grubx64.efi in both
secure mode and unsecure mode, I thought shim.efi had the efi keys. Any
thoughts?

grub boots into a prompt not to a menu, I do have a grub.cfg in the same
location as grubx64.efi. I know this is outside the scope of this mailing
list. I read that grub needs to be rebuilt with the new cfg file. Would
this loose the efi keys?


# Configuration file for dnsmasq:

# Turn on the debugging
log-dhcp

# Don't function as a DNS server
port=0

# kill multicast
dhcp-option=vendor:PXEClient,6,2b

# This range(s) is for the public interface, where dnsmasq functions
# as a proxy DHCP server providing boot information but no IP leases.
# Any ip in the subnet will do, so you may just put your server NIC ip here.
dhcp-range=192.168.0.5,proxy

# Set the boot filename for netboot/PXE. You will only need this if you
want to
# boot machines over the network and you will need the built in TFTP server.

#pxe-prompt="What system shall I netboot?", timeout before first available
action is taken:
pxe-prompt="Press F8 for the Menu.", 5

#Loads <tftp-root>/pxelinux.0 from dnsmasq TFTP server.
pxe-service=x86PC, "Install Fedora Workstation, (BIOS)", bios/pxelinux

#Loads <tftp-root>/uefi/shim.efi from dnsmasq TFTP server.
pxe-service=X86-64_EFI, "Boot From Network, (UEFI)", uefi/grubx64
pxe-service=BC_EFI, "Boot From Network, (UEFI)", uefi/grubx64

# Enable dnsmasq's built-in TFTP server
enable-tftp

# Set the root directory for files available via FTP.
tftp-root=/srv/tftpboot


On Wed, Nov 18, 2015 at 9:54 AM, Michael Kuron <
Post by Michael Kuron
In proxy mode, you can leave out the dhcp-boot lines. Also, note that some
hardware incorrectly reports an architecture of 9 (BC_EFI) instead of 7
(X86-64_EFI), so in general you’ll need to have lines for both in your
config.
I assume you’re using my patch from October 31st? The pxe-service line for
EFI should not have a file extension, .efi is added automatically. Also,
I’ve never needed dhcp-no-override or dhcp-option in proxy mode.
A Wireshark trace on UDP ports 67, 68, 69 and 4011 is generally the most
useful thing to help you debug the issue. Check if the server address and
file name are correctly sent to the client and make sure it requests the
TFTP download correctly. The log output you sent looks fine.
Michael
I have a dns proxy running on F23 and configured for older BIOS pxe and
all is working. On newer uefi I get a ip assigned and get to the "Press F8
for the Menu." After that everything quits and returns to the bios. Here is
some info. If there are more debugging options let me know? I am running
dnsmasq-2.75 with a patch from Michael Kuron earlier on this list.
/etc/dnsmasq.conf
# Turn on the debugging
log-dhcp
# Don't function as a DNS server
port=0
# kill multicast
dhcp-option=vendor:PXEClient,6,2b
# Disable re-use of the DHCP servername and filename fields as extra
# option space. That's to avoid confusing some old or broken DHCP clients.
dhcp-no-override
# This range(s) is for the public interface, where dnsmasq functions
# as a proxy DHCP server providing boot information but no IP leases.
# Any ip in the subnet will do, so you may just put your server NIC ip here.
dhcp-range=192.168.0.5,proxy
# Set the boot filename for netboot/PXE. You will only need this if you want to
# boot machines over the network and you will need the built in TFTP server.
# BIOS PXE clients
dhcp-boot=pxelinux.0
# UEFI PXE clients
dhcp-match=set:efi-x86_64,option:client-arch,7
dhcp-boot=tag:efi-x86_64,uefi/shim.efi
pxe-prompt="Press F8 for the Menu.", 5
#Loads <tftp-root>/pxelinux.0 from dnsmasq TFTP server.
pxe-service=x86PC, "Install Fedora Workstation, (BIOS)", pxelinux
#Loads <tftp-root>/uefi/shim.efi from dnsmasq TFTP server.
pxe-service=X86-64_EFI, "Boot From Network, (UEFI)", uefi/shim.efi
# Enable dnsmasq's built-in TFTP server
enable-tftp
# Set the root directory for files available via FTP.
tftp-root=/srv/tftpboot
systemd[1]: Started DNS caching server..
dnsmasq[1897]: started, version 2.75 DNS disabled
systemd[1]: Starting DNS caching server....
dnsmasq[1897]: compile time options: IPv6 GNU-getopt DBus no-i18n IDN DHCP
DHCPv6 no-Lua TFTP no-conntrack ipset auth DNSSEC loop-detect inotify
dnsmasq-dhcp[1897]: DHCP, proxy on subnet 192.168.0.5
dnsmasq-tftp[1897]: TFTP root is /srv/tftpboot
192.168.0.5/255.255.255.0
PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 1005692705 PXE(enp0s25) b8:ae:ed:73:6f:9b proxy
dnsmasq-dhcp[1897]: 1005692705 tags: efi-x86_64, enp0s25
dnsmasq-dhcp[1897]: 1005692705 bootfile name: uefi/shim.efi
dnsmasq-dhcp[1897]: 1005692705 broadcast response
dnsmasq-dhcp[1897]: 1005692705 sent size: 1 option: 53 message-type 2
dnsmasq-dhcp[1897]: 1005692705 sent size: 4 option: 54 server-identifier
192.168.0.5
dnsmasq-dhcp[1897]: 1005692705 sent size: 9 option: 60 vendor-class
50:58:45:43:6c:69:65:6e:74
dnsmasq-dhcp[1897]: 1005692705 sent size: 17 option: 97 client-machine-id
00:00:3f:65:c8:77:72:e3:11:93:4d:b8:ae:ed...
192.168.0.5/255.255.255.0
PXEClient:Arch:00007:UNDI:003016
192.168.0.5/255.255.255.0
PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 378552196 PXE(enp0s25) b8:ae:ed:73:6f:9b proxy
dnsmasq-dhcp[1897]: 378552196 tags: efi-x86_64, enp0s25
dnsmasq-dhcp[1897]: 378552196 bootfile name: uefi/shim.efi
dnsmasq-dhcp[1897]: 378552196 sent size: 1 option: 53 message-type 5
dnsmasq-dhcp[1897]: 378552196 sent size: 4 option: 54 server-identifier
192.168.0.5
dnsmasq-dhcp[1897]: 378552196 sent size: 9 option: 60 vendor-class
50:58:45:43:6c:69:65:6e:74
dnsmasq-dhcp[1897]: 378552196 sent size: 17 option: 97 client-machine-id
00:00:3f:65:c8:77:72:e3:11:93:4d:b8:ae:ed...
dnsmasq-dhcp[1897]: 378552196 sent size: 38 option: 43 vendor-encap
06:01:08:0a:1d:05:50:72:65:73:73:20:46:38...
192.168.0.5/255.255.255.0
PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 1005692706 PXE(enp0s25) b8:ae:ed:73:6f:9b proxy
dnsmasq-dhcp[1897]: 1005692706 tags: efi-x86_64, enp0s25
dnsmasq-dhcp[1897]: 1005692706 bootfile name: uefi/shim.efi
dnsmasq-dhcp[1897]: 1005692706 broadcast response
dnsmasq-dhcp[1897]: 1005692706 sent size: 1 option: 53 message-type 2
dnsmasq-dhcp[1897]: 1005692706 sent size: 4 option: 54 server-identifier
192.168.0.5
dnsmasq-dhcp[1897]: 1005692706 sent size: 9 option: 60 vendor-class
50:58:45:43:6c:69:65:6e:74
dnsmasq-dhcp[1897]: 1005692706 sent size: 17 option: 97 client-machine-id
00:00:3f:65:c8:77:72:e3:11:93:4d:b8:ae:ed...
192.168.0.5/255.255.255.0
PXEClient:Arch:00007:UNDI:003016
192.168.0.5/255.255.255.0
PXEClient:Arch:00007:UNDI:003016
dnsmasq-dhcp[1897]: 735833248 PXE(enp0s25) b8:ae:ed:73:6f:9b proxy
dnsmasq-dhcp[1897]: 735833248 tags: efi-x86_64, enp0s25
dnsmasq-dhcp[1897]: 735833248 bootfile name: uefi/shim.efi
dnsmasq-dhcp[1897]: 735833248 sent size: 1 option: 53 message-type 5
dnsmasq-dhcp[1897]: 735833248 sent size: 4 option: 54 server-identifier
192.168.0.5
dnsmasq-dhcp[1897]: 735833248 sent size: 9 option: 60 vendor-class
50:58:45:43:6c:69:65:6e:74
dnsmasq-dhcp[1897]: 735833248 sent size: 17 option: 97 client-machine-id
00:00:3f:65:c8:77:72:e3:11:93:4d:b8:ae:ed...
dnsmasq-dhcp[1897]: 735833248 sent size: 38 option: 43 vendor-encap
06:01:08:0a:1d:05:50:72:65:73:73:20:46:38...
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