Reputation: 1
I expect the host machine to receive TFTP requests. When testing with tftpboot and busybox_tftp_client, I can successfully download the file using:
tftp -g -l /tmp/testfile -r testfile tftpboot
However, it fails when running on the host machine.
Below is the docker-compose configuration:
services:
tftpboot:
container_name: tftpboot
image: pghalliday/tftp:latest
volumes:
- ~/Documents/dev/tftp:/var/tftpboot
command: /var/tftpboot
tty: true
ports:
- "69:69/udp"
networks:
- mytftp
busybox_tftp_client:
container_name: busybox_tftp_client
image: busybox:1.33.1-uclibc
# command: tftp -g -l /tmp/testfile -r testfile tftpboot
tty: true
volumes:
- ~/Documents/dev/tftp_client:/tmp
networks:
- mytftp
networks:
mytftp:
driver: bridge
I have already disabled the Windows firewall on the host machine. Below is the packet capture from tftpboot when the host machine receives a TFTP request:
# tcpdump -vv
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
09:01:04.892316 IP (tos 0x0, ttl 64, id 43302, offset 0, flags [DF], proto UDP (17), length 48)
172.22.0.1.37680 > 77e71dbd5167.69: [bad udp cksum 0x585d -> 0xc5a7!] 20 RRQ "testfile" netascii
09:01:04.892357 IP (tos 0xc0, ttl 64, id 55622, offset 0, flags [none], proto ICMP (1), length 76)
77e71dbd5167 > 172.22.0.1: ICMP 77e71dbd5167 udp port 69 unreachable, length 56
IP (tos 0x0, ttl 64, id 43302, offset 0, flags [DF], proto UDP (17), length 48)
172.22.0.1.37680 > 77e71dbd5167.69: [bad udp cksum 0x585d -> 0xc5a7!] 20 RRQ "testfile" netascii
09:01:04.892811 IP (tos 0x0, ttl 64, id 55719, offset 0, flags [DF], proto UDP (17), length 69)
77e71dbd5167.60685 > 192.168.65.7.53: [bad udp cksum 0xae0a -> 0x9c77!] 57639+ PTR? 1.0.22.172.in-addr.arpa. (41)
09:01:04.900630 IP (tos 0x0, ttl 63, id 1178, offset 0, flags [DF], proto UDP (17), length 69)
192.168.65.7.53 > 77e71dbd5167.60685: [bad udp cksum 0xae0a -> 0x1bf4!] 57639 NXDomain q: PTR? 1.0.22.172.in-addr.arpa. 0/0/0 (41)
09:01:04.901230 IP (tos 0x0, ttl 64, id 4839, offset 0, flags [DF], proto UDP (17), length 71)
77e71dbd5167.59054 > 192.168.65.7.53: [bad udp cksum 0xae0c -> 0xd09d!] 18503+ PTR? 7.65.168.192.in-addr.arpa. (43)
09:01:04.906643 IP (tos 0x0, ttl 63, id 1179, offset 0, flags [DF], proto UDP (17), length 71)
192.168.65.7.53 > 77e71dbd5167.59054: [bad udp cksum 0xae0c -> 0x501a!] 18503 NXDomain q: PTR? 7.65.168.192.in-addr.arpa. 0/0/0 (43)
09:01:05.890694 IP (tos 0x0, ttl 64, id 49861, offset 0, flags [DF], proto UDP (17), length 48)
172.22.0.1.45057 > 77e71dbd5167.69: [bad udp cksum 0x585d -> 0xa8d6!] 20 RRQ "testfile" netascii
09:01:05.890735 IP (tos 0xc0, ttl 64, id 55649, offset 0, flags [none], proto ICMP (1), length 76)
77e71dbd5167 > 172.22.0.1: ICMP 77e71dbd5167 udp port 69 unreachable, length 56
IP (tos 0x0, ttl 64, id 49861, offset 0, flags [DF], proto UDP (17), length 48)
172.22.0.1.45057 > 77e71dbd5167.69: [bad udp cksum 0x585d -> 0xa8d6!] 20 RRQ "testfile" netascii
09:01:07.895175 IP (tos 0x0, ttl 64, id 38962, offset 0, flags [DF], proto UDP (17), length 48)
172.22.0.1.35623 > 77e71dbd5167.69: [bad udp cksum 0x585d -> 0xcdb0!] 20 RRQ "testfile" netascii
09:01:07.895214 IP (tos 0xc0, ttl 64, id 55726, offset 0, flags [none], proto ICMP (1), length 76)
77e71dbd5167 > 172.22.0.1: ICMP 77e71dbd5167 udp port 69 unreachable, length 56
IP (tos 0x0, ttl 64, id 38962, offset 0, flags [DF], proto UDP (17), length 48)
172.22.0.1.35623 > 77e71dbd5167.69: [bad udp cksum 0x585d -> 0xcdb0!] 20 RRQ "testfile" netascii
09:01:09.954317 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has 172.22.0.1 tell 77e71dbd5167, length 28
09:01:09.954348 ARP, Ethernet (len 6), IPv4 (len 4), Reply 172.22.0.1 is-at 02:42:1b:60:5d:3d (oui Unknown), length 28
09:01:11.902952 IP (tos 0x0, ttl 64, id 21821, offset 0, flags [DF], proto UDP (17), length 48)
172.22.0.1.47451 > 77e71dbd5167.69: [bad udp cksum 0x585d -> 0x9f7c!] 20 RRQ "testfile" netascii
09:01:11.902994 IP (tos 0xc0, ttl 64, id 55744, offset 0, flags [none], proto ICMP (1), length 76)
77e71dbd5167 > 172.22.0.1: ICMP 77e71dbd5167 udp port 69 unreachable, length 56
IP (tos 0x0, ttl 64, id 21821, offset 0, flags [DF], proto UDP (17), length 48)
172.22.0.1.47451 > 77e71dbd5167.69: [bad udp cksum 0x585d -> 0x9f7c!] 20 RRQ "testfile" netascii
I expect the host machine to receive TFTP requests. When testing with tftpboot and busybox_tftp_client, I can successfully download the file using:
tftp -g -l /tmp/testfile -r testfile tftpboot
However, it fails when running on the host machine.
Upvotes: 0
Views: 18