netboot from router usb - asuswrt-merlin - RT-AC87U problem

[filip]

Hello,
I am following this blog on easy setup for pxe booting from usb connected to router.

after booting the client, I am getting this message:

PXE-T01 : File not found (/tmp/pxelinux.0)

my dnsmasq.conf.add:

# index file which will start boot
dhcp-boot=pxelinux.0

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

# put here the full path to your netboot image on a flash-drive
tftp-root=/tmp/mnt/PUPPY/netboot

log-dhcp

winscp-screenshot for the filestructure:

could anybody help please?

 

[ColinTaylor]

There appeared to be a bug in @RMerlin's implementation of tftp/dnsmasq as seen here.

It was working at a later date (at least with @john9527's firmware) as seen here.

What firmware version are you running?

 

[filip]

There appeared to be a bug in @RMerlin's implementation of tftp/dnsmasq as seen here.

It was working at a later date (at least with @john9527's firmware) as seen here.

What firmware version are you running?

Hello Colin,
many thanks for your response, yeah it seems as it is exactly same issue as at @RMerlin (strange was searching the net two days for this issue and have not foud that thread). I tried to test pxelinux.0 in /tmp/ folder and it got loaded.

my firmware version is: 384.4_2 - just checked that is the most recent - I will try the beta version or revert to older one - lets see if that helps!

 

[filip]

no success so far,

syslog:

dnsmasq-dhcp[1766]: DHCP, IP range 192.168.1.100 -- 192.168.1.254, lease time 1d
dnsmasq-tftp[1766]: TFTP root is /tmp/mnt/PUPPY/netboot

same issue
PXE-T01 : File not found (/tmp/pxelinux.0)

tested with firmware:
recent38.4-2; 380.68_4 and 380.70beta

usb sharing setup:

 

[ColinTaylor]

What can I say... it works for me using John's firmware.

It's probably worth double-checking that it's a tftp-root problem and not a client issue. From a LAN client's command prompt can you issue the following:

tftp 192.168.1.1 get zzzz

You should then see what path it is defaulting to in the router's syslog:

Apr 3 20:36:43 dnsmasq-tftp[21490]: file /tmp/mnt/VERBATIM/ASUS/pxe/bios/zzzz not found
Apr 3 20:36:44 dnsmasq-tftp[21490]: file /tmp/mnt/VERBATIM/ASUS/pxe/bios/zzzz not found
Apr 3 20:36:46 dnsmasq-tftp[21490]: file /tmp/mnt/VERBATIM/ASUS/pxe/bios/zzzz not found
Apr 3 20:36:50 dnsmasq-tftp[21490]: file /tmp/mnt/VERBATIM/ASUS/pxe/bios/zzzz not found
Apr 3 20:36:58 dnsmasq-tftp[21490]: file /tmp/mnt/VERBATIM/ASUS/pxe/bios/zzzz not found

 

[filip]

dont know linux and just few days in pxe... I understand what I want, but dont understand much how to do it and what I am doing...

after ssh to 192.168.1.1 from different pc your command nothing happen in syslog (192.168.1.1/tmp/syslog.log).
here is what happens in putty:

filip@RT-AC87U:/tmp/home/root# netstat -an|grep 69
tcp 0 0 169.254.39.49:669 169.254.39.53:686 ESTABLISHED
tcp 0 0 169.254.39.49:679 169.254.39.53:686 ESTABLISHED
udp 0 0 0.0.0.0:69 0.0.0.0:*
filip@RT-AC87U:/tmp/home/root# tftp 192.168.1.1 get zzzz
BusyBox v1.25.1 (2018-03-31 20:06:45 EDT) multi-call binary.

Usage: tftp [OPTIONS] HOST [PORT]

Transfer a file from/to tftp server

-l FILE Local FILE
-r FILE Remote FILE
-g Get file
-p Put file
filip@RT-AC87U:/tmp/home/root#
filip@RT-AC87U:/tmp/home/root#

after unsuccessfull diskless client in syslog:

Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 available DHCP range: 192.168.1.100 -- 192.168.1.254
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 vendor class: PXEClient:Arch:00000:UNDI:002001
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 DHCPDISCOVER(br0) fc:aa:14:07:ed:b5
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 tags: lan, br0
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 DHCPOFFER(br0) 192.168.1.122 fc:aa:14:07:ed:b5
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 requested options: 1:netmask, 2:time-offset, 3:router, 4, 5,
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 requested options: 6:dns-server, 11, 12:hostname, 13:boot-file-size,
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 requested options: 15:domain-name, 16:swap-server, 17:root-path,
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 requested options: 18:extension-path, 22:max-datagram-reassembly,
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 requested options: 23:default-ttl, 28:broadcast, 40:nis-domain,
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 requested options: 41:nis-server, 42:ntp-server, 43:vendor-encap,
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 requested options: 50:requested-address, 51:lease-time, 54:server-identifier,
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 requested options: 58:T1, 59:T2, 60:vendor-class, 66:tftp-server,
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 requested options: 67:bootfile-name, 128, 129, 130, 131, 132,
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 requested options: 133, 134, 135
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 next server: 192.168.1.1
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 broadcast response
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 sent size: 1 option: 53 message-type 2
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 sent size: 4 option: 54 server-identifier 192.168.1.1
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 sent size: 4 option: 51 lease-time 1d
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 sent size: 11 option: 67 bootfile-name pxelinux.0
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 sent size: 4 option: 58 T1 12h
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 sent size: 4 option: 59 T2 21h
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 sent size: 4 option: 1 netmask 255.255.255.0
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 sent size: 4 option: 28 broadcast 192.168.1.255
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 sent size: 4 option: 6 dns-server 192.168.1.1
Apr 3 22:54:06 dnsmasq-dhcp[1344]: 352841141 sent size: 4 option: 3 router 192.168.1.1

johns firmware unfortunately for older routers only... cannot test on my ac87u

 

[ColinTaylor]

This is from a Windows command prompt:

tftp 192.168.1.1 get zzzz

tftp is a Windows Feature. I can't remember whether it's installed by default.

 

[filip]

took me a while to figure that out - needs to be enabled on win10
anyway the result is:

C:\WINDOWS\system32>tftp 192.168.1.1 get zzzz
Connect request failed

anything in syslog

is it enabled as in dnsmasq.conf.add? is there anything else I need to do for activation?

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

thanks for your help so far! now filip get zzzZZZzzz

 

[ColinTaylor]

Sorry, I'm out of ideas.