2 个月前我的 PXE 安装运行正常，现在它无法发送文件 grubx64.efi 来开始 PXE 安装。
juil. 08 08:03:05 install-server.my.domain dnsmasq[5913]: started, version 2.79 DNS disabled
juil. 08 08:03:05 install-server.my.domain dnsmasq[5913]: compile time options: IPv6 GNU-getopt DBus no-i18n IDN2 DHCP DHCPv6 no-Lua TFTP no-conntrack ipset auth DNSSEC loop-detect inotify
juil. 08 08:03:05 install-server.my.domain dnsmasq-dhcp[5913]: DHCP, IP range 192.168.0.2 -- 192.168.0.50, lease time 2m
juil. 08 08:03:05 install-server.my.domain dnsmasq-tftp[5913]: TFTP root is /tftpboot
juil. 08 08:04:20 install-server.my.domain dnsmasq-dhcp[5913]: DHCPDISCOVER(eth0) aa:bb:cc:11:22:33
juil. 08 08:04:20 install-server.my.domain dnsmasq-dhcp[5913]: DHCPOFFER(eth0) 192.168.0.2 aa:bb:cc:11:22:33
juil. 08 08:04:24 install-server.my.domain dnsmasq-dhcp[5913]: DHCPREQUEST(eth0) 192.168.0.2 aa:bb:cc:11:22:33
juil. 08 08:04:24 install-server.my.domain dnsmasq-dhcp[5913]: DHCPACK(eth0) 192.168.0.2 aa:bb:cc:11:22:33
juil. 08 08:04:25 install-server.my.domain dnsmasq-dhcp[5913]: PXE(eth0) 192.168.0.2 aa:bb:cc:11:22:33 grubx64.efi
juil. 08 08:06:40 install-server.my.domain dnsmasq-tftp[5913]: failed sending /tftpboot/grubx64.efi to 192.168.0.2
juil. 08 08:06:44 install-server.my.domain dnsmasq-tftp[5913]: failed sending /tftpboot/grubx64.efi to 192.168.0.2
juil. 08 08:06:48 install-server.my.domain dnsmasq-tftp[5913]: failed sending /tftpboot/grubx64.efi to 192.168.0.2
如您所见，主机发出 DHCP 请求并根据 /etc/dnsmas.d/pxe.conf 中配置的掩码获取 IP
interface=eth0
#bind-interfaces
domain=my.domain
# DHCP range-leases
dhcp-range=eth0,192.168.0.2,192.168.0.50,255.255.255.0,2m
#DHCP-HOST
dhcp-host=aa:bb:cc:11:22:33,192.168.0.2
# PXE
dhcp-boot=pxlinux.0,install-server.my.domain,192.168.1.185
dhcp-boot=grubx64.efi,install-server.my.domain,192.168.1.185
# Gateway
dhcp-option=3,192.168.0.254
# Broadcast Address
dhcp-option=28,10.0.0.255
# NTP Server
dhcp-option=42,0.0.0.0
pxe-prompt="Press F8 for menu.", 60
pxe-service=X86-64_EFI, "UEFI RHEL8/Centos8 from server 192.168.1.185", grubx64.efi
pxe-service=X86-64_EFI, "LEGACY RHEL8/Centos8 from server 192.168.1.185", pxelinux
enable-tftp
tftp-root=/tftpboot
安装服务器位于另一个网络中，但我在网络上的物理防火墙中有一个 DHCP 转发。这是我检查主机 ip（因此在 DHCP 请求之后）的 tcpdump 日志。
08:04:25.408381 IP (tos 0x0, ttl 64, id 22212, offset 0, flags [DF], proto UDP (17), length 384)
client-host.my.domain.pxe > install-server.my.domain.pxe: [udp sum ok] UDP, length 356
08:04:25.408520 IP (tos 0xc0, ttl 64, id 51864, offset 0, flags [none], proto UDP (17), length 338)
install-server.my.domain.pxe > client-host.my.domain.pxe: [bad udp cksum 0x3239 -> 0x8627!] UDP, length 310
08:04:26.212512 IP (tos 0x0, ttl 64, id 22213, offset 0, flags [none], proto UDP (17), length 82)
client-host.my.domain.msmq > install-server.my.domain.tftp: [udp sum ok] 54 RRQ "grubx64.efi" octet tsize 0 blksize 1468 windowsize 4
08:04:26.212631 IP (tos 0x0, ttl 64, id 52643, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.37879 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0x1642!] UDP, length 16
08:04:26.213928 IP (tos 0x0, ttl 255, id 22214, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 52643, offset 0, flags [none], proto UDP (17), length 44, bad cksum 6cec (->7c34)!)
install-server.my.domain.37879 > client-host.my.domain.msmq: UDP, length 16
08:04:28.215103 IP (tos 0x0, ttl 64, id 53840, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.37879 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0x1642!] UDP, length 16
08:04:28.216469 IP (tos 0x0, ttl 255, id 22215, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 53840, offset 0, flags [none], proto UDP (17), length 44, bad cksum 683f (->7787)!)
install-server.my.domain.37879 > client-host.my.domain.msmq: UDP, length 16
08:04:30.247594 IP (tos 0x0, ttl 64, id 22216, offset 0, flags [none], proto UDP (17), length 82)
client-host.my.domain.msmq > install-server.my.domain.tftp: [udp sum ok] 54 RRQ "grubx64.efi" octet tsize 0 blksize 1468 windowsize 4
08:04:30.247715 IP (tos 0x0, ttl 64, id 55676, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.63703 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xb161!] UDP, length 16
08:04:30.249021 IP (tos 0x0, ttl 255, id 22217, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 55676, offset 0, flags [none], proto UDP (17), length 44, bad cksum 6113 (->705b)!)
install-server.my.domain.63703 > client-host.my.domain.msmq: UDP, length 16
08:04:31.248883 IP (tos 0x0, ttl 64, id 56468, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.37879 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0x1642!] UDP, length 16
08:04:31.250047 IP (tos 0x0, ttl 255, id 22218, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 56468, offset 0, flags [none], proto UDP (17), length 44, bad cksum 5dfb (->6d43)!)
install-server.my.domain.37879 > client-host.my.domain.msmq: UDP, length 16
08:04:32.250069 IP (tos 0x0, ttl 64, id 57252, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.63703 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xb161!] UDP, length 16
08:04:32.251593 IP (tos 0x0, ttl 255, id 22219, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 57252, offset 0, flags [none], proto UDP (17), length 44, bad cksum 5aeb (->6a33)!)
install-server.my.domain.63703 > client-host.my.domain.msmq: UDP, length 16
08:04:34.288725 IP (tos 0x0, ttl 64, id 22220, offset 0, flags [none], proto UDP (17), length 82)
client-host.my.domain.msmq > install-server.my.domain.tftp: [udp sum ok] 54 RRQ "grubx64.efi" octet tsize 0 blksize 1468 windowsize 4
08:04:34.288893 IP (tos 0x0, ttl 64, id 57487, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.52881 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xdba7!] UDP, length 16
08:04:34.290134 IP (tos 0x0, ttl 255, id 22221, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 57487, offset 0, flags [none], proto UDP (17), length 44, bad cksum 5a00 (->6948)!)
install-server.my.domain.52881 > client-host.my.domain.msmq: UDP, length 16
08:04:35.040026 IP (tos 0x0, ttl 64, id 57726, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.63703 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xb161!] UDP, length 16
08:04:35.041168 IP (tos 0x0, ttl 255, id 22222, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 57726, offset 0, flags [none], proto UDP (17), length 44, bad cksum 5911 (->6859)!)
install-server.my.domain.63703 > client-host.my.domain.msmq: UDP, length 16
08:04:36.041381 IP (tos 0x0, ttl 64, id 58255, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.52881 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xdba7!] UDP, length 16
08:04:36.041390 IP (tos 0x0, ttl 64, id 58256, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.37879 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0x1642!] UDP, length 16
08:04:36.042695 IP (tos 0x0, ttl 255, id 22223, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 58255, offset 0, flags [none], proto UDP (17), length 44, bad cksum 5700 (->6648)!)
install-server.my.domain.52881 > client-host.my.domain.msmq: UDP, length 16
08:04:36.042701 IP (tos 0x0, ttl 255, id 22224, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 58256, offset 0, flags [none], proto UDP (17), length 44, bad cksum 56ff (->6647)!)
install-server.my.domain.37879 > client-host.my.domain.msmq: UDP, length 16
08:04:38.325832 IP (tos 0x0, ttl 64, id 22225, offset 0, flags [none], proto UDP (17), length 82)
client-host.my.domain.msmq > install-server.my.domain.tftp: [udp sum ok] 54 RRQ "grubx64.efi" octet tsize 0 blksize 1468 windowsize 4
08:04:38.325937 IP (tos 0x0, ttl 64, id 59359, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.65269 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xab43!] UDP, length 16
08:04:38.327234 IP (tos 0x0, ttl 255, id 22226, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 59359, offset 0, flags [none], proto UDP (17), length 44, bad cksum 52b0 (->61f8)!)
install-server.my.domain.65269 > client-host.my.domain.msmq: UDP, length 16
08:04:39.076826 IP (tos 0x0, ttl 64, id 59949, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.52881 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xdba7!] UDP, length 16
08:04:39.078267 IP (tos 0x0, ttl 255, id 22227, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 59949, offset 0, flags [none], proto UDP (17), length 44, bad cksum 5062 (->5faa)!)
install-server.my.domain.52881 > client-host.my.domain.msmq: UDP, length 16
08:04:40.078109 IP (tos 0x0, ttl 64, id 60833, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.65269 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xab43!] UDP, length 16
08:04:40.078128 IP (tos 0x0, ttl 64, id 60834, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.63703 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xb161!] UDP, length 16
08:04:40.079297 IP (tos 0x0, ttl 255, id 22228, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 60834, offset 0, flags [none], proto UDP (17), length 44, bad cksum 4ced (->5c35)!)
install-server.my.domain.63703 > client-host.my.domain.msmq: UDP, length 16
08:04:40.079306 IP (tos 0x0, ttl 255, id 22229, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 60833, offset 0, flags [none], proto UDP (17), length 44, bad cksum 4cee (->5c36)!)
install-server.my.domain.65269 > client-host.my.domain.msmq: UDP, length 16
08:04:42.362965 IP (tos 0x0, ttl 64, id 22230, offset 0, flags [none], proto UDP (17), length 82)
client-host.my.domain.msmq > install-server.my.domain.tftp: [udp sum ok] 54 RRQ "grubx64.efi" octet tsize 0 blksize 1468 windowsize 4
08:04:42.363200 IP (tos 0x0, ttl 64, id 62336, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.43294 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0x011b!] UDP, length 16
08:04:42.364362 IP (tos 0x0, ttl 255, id 22231, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 62336, offset 0, flags [none], proto UDP (17), length 44, bad cksum 470f (->5657)!)
install-server.my.domain.43294 > client-host.my.domain.msmq: UDP, length 16
08:04:43.114150 IP (tos 0x0, ttl 64, id 62456, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.65269 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xab43!] UDP, length 16
08:04:43.115391 IP (tos 0x0, ttl 255, id 22232, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 62456, offset 0, flags [none], proto UDP (17), length 44, bad cksum 4697 (->55df)!)
install-server.my.domain.65269 > client-host.my.domain.msmq: UDP, length 16
08:04:44.115353 IP (tos 0x0, ttl 64, id 63169, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.43294 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0x011b!] UDP, length 16
08:04:44.115374 IP (tos 0x0, ttl 64, id 63170, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.52881 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xdba7!] UDP, length 16
08:04:44.116952 IP (tos 0x0, ttl 255, id 22233, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 63169, offset 0, flags [none], proto UDP (17), length 44, bad cksum 43ce (->5316)!)
install-server.my.domain.43294 > client-host.my.domain.msmq: UDP, length 16
08:04:44.116960 IP (tos 0x0, ttl 255, id 22234, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 63170, offset 0, flags [none], proto UDP (17), length 44, bad cksum 43cd (->5315)!)
install-server.my.domain.52881 > client-host.my.domain.msmq: UDP, length 16
08:04:45.116587 IP (tos 0x0, ttl 64, id 63574, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.37879 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0x1642!] UDP, length 16
08:04:45.118479 IP (tos 0x0, ttl 255, id 22235, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 63574, offset 0, flags [none], proto UDP (17), length 44, bad cksum 4239 (->5181)!)
install-server.my.domain.37879 > client-host.my.domain.msmq: UDP, length 16
08:04:46.403078 IP (tos 0x0, ttl 64, id 22236, offset 0, flags [none], proto UDP (17), length 82)
client-host.my.domain.msmq > install-server.my.domain.tftp: [udp sum ok] 54 RRQ "grubx64.efi" octet tsize 0 blksize 1468 windowsize 4
08:04:46.403202 IP (tos 0x0, ttl 64, id 63654, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.45854 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xf71a!] UDP, length 16
08:04:46.404463 IP (tos 0x0, ttl 255, id 22237, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 63654, offset 0, flags [none], proto UDP (17), length 44, bad cksum 41e9 (->5131)!)
install-server.my.domain.45854 > client-host.my.domain.msmq: UDP, length 16
08:04:47.154159 IP (tos 0x0, ttl 64, id 64313, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.43294 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0x011b!] UDP, length 16
08:04:47.155554 IP (tos 0x0, ttl 255, id 22238, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 64313, offset 0, flags [none], proto UDP (17), length 44, bad cksum 3f56 (->4e9e)!)
install-server.my.domain.43294 > client-host.my.domain.msmq: UDP, length 16
08:04:48.155383 IP (tos 0x0, ttl 64, id 64897, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.45854 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xf71a!] UDP, length 16
08:04:48.155402 IP (tos 0x0, ttl 64, id 64898, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.65269 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xab43!] UDP, length 16
08:04:48.156575 IP (tos 0x0, ttl 255, id 22239, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 64897, offset 0, flags [none], proto UDP (17), length 44, bad cksum 3d0e (->4c56)!)
install-server.my.domain.45854 > client-host.my.domain.msmq: UDP, length 16
08:04:48.156584 IP (tos 0x0, ttl 255, id 22240, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 64898, offset 0, flags [none], proto UDP (17), length 44, bad cksum 3d0d (->4c55)!)
install-server.my.domain.65269 > client-host.my.domain.msmq: UDP, length 16
08:04:49.156662 IP (tos 0x0, ttl 64, id 350, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.63703 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xb161!] UDP, length 16
08:04:49.158131 IP (tos 0x0, ttl 255, id 22241, offset 0, flags [none], proto ICMP (1), length 56)
client-host.my.domain > install-server.my.domain: ICMP client-host.my.domain udp port msmq unreachable, length 36
IP (tos 0x0, ttl 64, id 350, offset 0, flags [none], proto UDP (17), length 44, bad cksum 3932 (->487a)!)
install-server.my.domain.63703 > client-host.my.domain.msmq: UDP, length 16
08:04:51.159273 IP (tos 0x0, ttl 64, id 2296, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.45854 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xf71a!] UDP, length 16
08:04:52.160713 IP (tos 0x0, ttl 64, id 2710, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.43294 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0x011b!] UDP, length 16
08:04:53.162031 IP (tos 0x0, ttl 64, id 3266, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.52881 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xdba7!] UDP, length 16
08:04:56.165878 IP (tos 0x0, ttl 64, id 4452, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.45854 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xf71a!] UDP, length 16
08:04:57.167255 IP (tos 0x0, ttl 64, id 4533, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.65269 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xab43!] UDP, length 16
08:05:01.172591 IP (tos 0x0, ttl 64, id 8065, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.43294 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0x011b!] UDP, length 16
08:05:02.173884 IP (tos 0x0, ttl 64, id 9037, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.37879 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0x1642!] UDP, length 16
08:05:05.179113 IP (tos 0x0, ttl 64, id 10580, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.45854 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xf71a!] UDP, length 16
08:05:06.180485 IP (tos 0x0, ttl 64, id 11167, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.63703 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xb161!] UDP, length 16
08:05:10.185410 IP (tos 0x0, ttl 64, id 13844, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.52881 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xdba7!] UDP, length 16
08:05:14.190443 IP (tos 0x0, ttl 64, id 14710, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.65269 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xab43!] UDP, length 16
08:05:18.195328 IP (tos 0x0, ttl 64, id 15745, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.43294 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0x011b!] UDP, length 16
08:05:22.200379 IP (tos 0x0, ttl 64, id 18804, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.45854 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xf71a!] UDP, length 16
08:05:35.216476 IP (tos 0x0, ttl 64, id 27301, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.37879 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0x1642!] UDP, length 16
08:05:39.221480 IP (tos 0x0, ttl 64, id 27378, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.63703 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xb161!] UDP, length 16
08:05:43.226525 IP (tos 0x0, ttl 64, id 30252, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.52881 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xdba7!] UDP, length 16
08:05:47.231051 IP (tos 0x0, ttl 64, id 31405, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.65269 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xab43!] UDP, length 16
08:05:51.235911 IP (tos 0x0, ttl 64, id 35187, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.43294 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0x011b!] UDP, length 16
08:05:55.241080 IP (tos 0x0, ttl 64, id 37681, offset 0, flags [none], proto UDP (17), length 44)
install-server.my.domain.45854 > client-host.my.domain.msmq: [bad udp cksum 0x3113 -> 0xf71a!] UDP, length 16
如果有人知道问题可能出在哪里？我找了很多地方，但似乎没有发现什么（尝试在安装服务器上禁用软件防火墙，在物理防火墙中禁用任何 -> 任何，禁用 SELinux。因此基础设施没有问题，因为它与正常工作时相同）。
可以肯定的是，DNSMASQ发生了变化，因此它可能改变了它的某些行为。
更多信息：
- 名称/IP 为占位符
- 操作系统 Redhat 8.6：4.18.0-372.13.1el8_6.x86_64
- dnsmasq 版本 2.79
更新 2022 年 11 月 23 日我在已经安装的同一台机器上安装了 tftp 客户端，获取文件没有问题
我在 dnsmasq 上停用了 tftp 启动，并在独立模式下设置了 tftp 服务器。我收到了以下新日志
nov. 23 08:48:48 install-server.my.domain in.tftpd[22012]: RRQ from ::ffff:192.168.0.2 filename grubx64.efi
nov. 23 08:48:48 install-server.my.domain in.tftpd[22012]: tftpd: read: Connection refused
尝试禁用所有安全措施（selinux、逻辑和物理防火墙），但仍然没有效果
没有更新客户端的 bios。可能是在 dnsmasq/tftp-server 更新后它就坏了