-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 There's no DHCP traffic in that capture. It appears to all be ssh.
Wrong interface? Cheers, Simon. On 24/01/17 08:50, Steven Shiau wrote: > Hi Simon, > > Attached please find the dump file of the command "tcpdump -s 0 -w > capturefile". Let me know if you need more info. Thank you very > much. > > Steven > > > On 1/24/2017 AM 05:25, Simon Kelley wrote: Thanks for the reply. > Please could you repeat the tcpdump using the command > > tcpdump -s 0 -w capturefile > > and send me the resulting file? That has far more information than > tcpdump prints. > > > Cheers, > > Simon. > > On 20/01/17 08:39, Steven Shiau wrote: >>>> Hi Simon, >>>> >>>> Thanks for your reply. I am answering you in the following. >>>> >>>> On 2017/01/20 06:47, Simon Kelley wrote: >>>>> Your example 3 - I'm confused why that shouldn't work - the >>>>> PXE client seems to be making further requests which are >>>>> bring ignored. Would it be possible for you to get a packet >>>>> dump of that exchange using tcpdump? >>>> $ sudo tcpdump -ni ens38 'udp port 67 and udp port 68' >>>> tcpdump: verbose output suppressed, use -v or -vv for full >>>> protocol decode listening on ens38, link-type EN10MB >>>> (Ethernet), capture size 262144 bytes 16:18:33.208355 IP >>>> 0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from >>>> 00:0c:29:1d:9a:d1, length 347 16:18:36.205647 IP >>>> 192.168.22.254.67 > 255.255.255.255.68: BOOTP/DHCP, Reply, >>>> length 341 16:18:36.385548 IP 0.0.0.0.68 > >>>> 255.255.255.255.67: BOOTP/DHCP, Request from >>>> 00:0c:29:1d:9a:d1, length 359 16:18:36.386212 IP >>>> 192.168.22.254.67 > 255.255.255.255.68: BOOTP/DHCP, Reply, >>>> length 341 ^C 4 packets captured 4 packets received by filter >>>> 0 packets dropped by kernel >>>> >>>>> Example 4 looks quite hopeful - the client is >>>>> succerssfully downloading the bootx64.efi file (ignore the >>>>> error before, that's just testing for the existance of the >>>>> file. >>>>> >>>>> Can you see what's displayed on the client system at this >>>>> point? >>>> It's blank screen due to the background_image for grub is >>>> not downloaded, and in the end the grub shows no grub.cfg >>>> error, as attached. That format is from the grub prefix we >>>> added by: ======================================= set >>>> prefix=(tftp)/grub-efi.cfg echo "Grub CPU and platform: >>>> \$grub_cpu, \$grub_platform" echo 'Network status: ' >>>> net_ls_cards net_ls_addr net_ls_routes >>>> >>>> tr --set pretty_mac x: x- \$net_default_mac >>>> >>>> echo "Loading config file >>>> \$prefix/grub.cfg-01-\$pretty_mac..." configfile >>>> \$prefix/grub.cfg-01-\$pretty_mac >>>> >>>> echo "Loading config file >>>> \$prefix/grub.cfg-\$net_default_ip..." configfile >>>> \$prefix/grub.cfg-\$net_default_ip >>>> >>>> echo "Loading config file: \$prefix/grub.cfg" configfile >>>> \$prefix/grub.cfg >>>> >>>> echo "Could not find config file >>>> \$prefix/grub.cfg-\$pretty_mac, >>>> \$prefix/grub.cfg-\$net_default_ip or \$prefix/grub.cfg!" >>>> sleep 15 ======================================= This is >>>> exactly the same problem as mentioned here: >>>> http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2016q4/010 931 > >>>> .html >>>> > i.e., only grub efi is downloaded, while the rest of required files > are >>>> not downloaded. As I mentioned for comparison, for non-proxy >>>> mode with same configuration, it works well. >>>> >>>> Thanks again. >>>> >>>> Steven >>>> >>>> >>>> >>>> _______________________________________________ >>>> Dnsmasq-discuss mailing list >>>> Dnsmasq-discuss@lists.thekelleys.org.uk >>>> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss >>>> >> >> >>>> _______________________________________________ >> Dnsmasq-discuss mailing list >> Dnsmasq-discuss@lists.thekelleys.org.uk >> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss > > > > _______________________________________________ Dnsmasq-discuss > mailing list Dnsmasq-discuss@lists.thekelleys.org.uk > http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss > -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQIcBAEBCAAGBQJYiksHAAoJEBXN2mrhkTWin7IP+gNguubssPNtRugS0v84q0fp FJqaaPClvxugayygm8BP/J0xD0Gy+2jV9mdOVDpIJpJFzOPYI418KhoH81fbYVa1 W26UdvWwMii4dcxhw/fqcufW/OnmZYvr9yu/N9Vchz14MAtSUKqKEekH1sXohKxP wTywXgX7dBisbWaROiO/1EZxRN3YMJxgV4psqqsdndRqdB00HIeJmDxkUG75AqbE JnWfwqQEod9t1SV8kMbyBxO0w6ol+eoRXHRLyfp9EyN9WjoSyUkCZxgRt/I5GB4X cmqvChPcaicQAFwp13RJPd5LeM0NGUDZSHL2ekkvyeIKB2qlOXk87YGLPoTlmucy FBYWAaCnj7oXdFMWQYFyl9hBU0rD03LhTnq0ss4m3SBxpYcf95ScoGF6VPKMiSwF YuVrYDpDm4dmEfAIRCgUsd86JYG8uMoD3s9mvu4G5SbluYlB9s++OJapASTWPEvy GLeDKZX/iQJl2TUYJKOPwYkn7Ng/LbzErIuc+ODx7Ea/m7tFqAElT4KvOVf3/olA jNZ3dGpr9iP83brMUeu38L0AXJljFI8vjBk79p6uW7Z6LlRuasjaWrz27tQ2uL2e xLxp8yt4hWE4cZTZ6OqqtQnSokaM1tbBDQFvx9SZ78K2dk4ilp/fQcKVjM/9NKco dDDQm0EmfDQqc+A6k1q9 =dJa0 -----END PGP SIGNATURE----- _______________________________________________ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss