Am 18.08.20 um 20:30 schrieb Tauno Voipio:
Thank you for your support.

> ...
> The protocol to look at is UDP, ports 67 and 68.

It looks ok to me. Here is the client output:

After restart I am beginning with
--- route
Kernel-IP-Routentabelle
Ziel            Router          Genmask         Flags Metric Ref    Use
Iface
192.168.1.64    m-router.dmz.kn 255.255.255.192 UG    202    0        0 eth0
192.168.2.0     0.0.0.0         255.255.255.0   U     202    0        0 eth0
---- end
Thats OK but missing defaut GW.

--- dhclient -v eth0
Internet Systems Consortium DHCP Client 4.4.1
Copyright 2004-2018 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/eth0/dc:a6:32:87:69:13
Sending on   LPF/eth0/dc:a6:32:87:69:13
Sending on   Socket/fallback
DHCPREQUEST for 192.168.2.14 on eth0 to 255.255.255.255 port 67
DHCPNAK from 192.168.2.1
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4
DHCPOFFER of 192.168.2.14 from 192.168.2.4
DHCPREQUEST for 192.168.2.14 on eth0 to 255.255.255.255 port 67
DHCPACK of 192.168.2.14 from 192.168.2.4
Warning: The unit file, source configuration file or drop-ins of
systemd-timesyncd.service changed on disk. Run 'systemctl daemon-reload'
to reload units.
bound to 192.168.2.14 -- renewal in 37999 seconds
--- end

Normaly dhcp/dns at 192.168.2.1 is off. Same result if it is on/off, no
default GW.


Starting tcpdump on the client with capturining udp 67,68 into file. On
a second terminal doing

--- dhclient -v -r eth0
Killed old client process
Internet Systems Consortium DHCP Client 4.4.1
Copyright 2004-2018 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/eth0/dc:a6:32:87:69:13
Sending on   LPF/eth0/dc:a6:32:87:69:13
Sending on   Socket/fallback
DHCPRELEASE of 192.168.2.14 on eth0 to 192.168.2.4 port 67
Warning: The unit file, source configuration file or drop-ins of
systemd-timesyncd.service changed on disk. Run 'systemctl daemon-reload'
to reload units.
--- end
Stopping tcpdump

--- dcpdump file
P (tos 0x0, ttl 64, id 36249, offset 0, flags [DF], proto UDP (17),
length 328)
    192.168.2.14.68 > 192.168.2.4.67: BOOTP/DHCP, Request from
dc:a6:32:87:69:13, length 300, xid 0x1c37e372, Flags [none]
   Client-IP 192.168.2.14
   Client-Ethernet-Address dc:a6:32:87:69:13
   Vendor-rfc1048 Extensions
     Magic Cookie 0x63825363
     DHCP-Message Option 53, length 1: Release
     Server-ID Option 54, length 4: 192.168.2.4
     Hostname Option 12, length 6: "hoshi2"
IP (tos 0x0, ttl 64, id 9930, offset 0, flags [none], proto UDP (17),
length 365)
    0.0.0.0.68 > 255.255.255.255.67: BOOTP/DHCP, Request from
dc:a6:32:87:69:13, length 337, xid 0x830907f7, Flags [none]
   Client-Ethernet-Address dc:a6:32:87:69:13
   Vendor-rfc1048 Extensions
     Magic Cookie 0x63825363
     DHCP-Message Option 53, length 1: Request
     Client-ID Option 61, length 7: ether dc:a6:32:87:69:13
     Requested-IP Option 50, length 4: 192.168.2.14
     MSZ Option 57, length 2: 1472
     Vendor-Class Option 60, length 45:
"dhcpcd-8.1.2:Linux-5.4.51-v7l+:armv7l:BCM2711"
     Hostname Option 12, length 6: "hoshi2"
     T145 Option 145, length 1: 1
     Parameter-Request Option 55, length 14:
       Subnet-Mask, Classless-Static-Route, Static-Route,
--> Default-Gateway <-- Thats the request for default GW
       Domain-Name-Server, Hostname, Domain-Name, MTU
       BR, Lease-Time, Server-ID, RN
       RB, Option 119
IP (tos 0x0, ttl 64, id 9930, offset 0, flags [none], proto UDP (17),
length 576)
    192.168.2.1.67 > 255.255.255.255.68: BOOTP/DHCP, Reply, length 548,
xid 0x830907f7, Flags [Broadcast]
   Server-IP 192.168.2.1
   Client-Ethernet-Address dc:a6:32:87:69:13
   Vendor-rfc1048 Extensions
     Magic Cookie 0x63825363
     DHCP-Message Option 53, length 1: NACK
IP (tos 0xc0, ttl 64, id 26735, offset 0, flags [none], proto UDP (17),
length 419)
    192.168.2.4.67 > 192.168.2.14.68: BOOTP/DHCP, Reply, length 391, xid
0x830907f7, Flags [none]
-->   Your-IP 192.168.2.14   <-- Thats the Client IP
-->   Server-IP 192.168.2.4  <-- Thats my dnsmasq
   Client-Ethernet-Address dc:a6:32:87:69:13
   Vendor-rfc1048 Extensions
     Magic Cookie 0x63825363
     DHCP-Message Option 53, length 1: ACK
     Server-ID Option 54, length 4: 192.168.2.4
     Lease-Time Option 51, length 4: 82800
     RN Option 58, length 4: 41400
     RB Option 59, length 4: 72450
     Subnet-Mask Option 1, length 4: 255.255.255.0
     BR Option 28, length 4: 192.168.2.255
     Hostname Option 12, length 6: "hoshi2"
     Classless-Static-Route Option 121, length 9:
(192.168.1.64/26:192.168.2.2)
     T119 Option 119, length 58:
868,28026,2667,28261,26996,26990,26469,29187,28261,29696,1388,28515,24940,49156
,1382,29289,29818,866,28536,192,1034,27502,25961,29801,28263,25970,1134,24941,2
5856
     Domain-Name Option 15, length 18: "dmz.kneitinger.net"
     Domain-Name-Server Option 6, length 4: 192.168.2.4
-->     Default-Gateway Option 3, length 4: 192.168.2.1 <-- Thats the
defaultgw
--- end
Seems to be ok, for me.

--- route
Kernel-IP-Routentabelle
Ziel            Router          Genmask         Flags Metric Ref    Use
Iface
192.168.1.64    m-router.dmz.kn 255.255.255.192 UG    202    0        0 eth0
192.168.2.0     0.0.0.0         255.255.255.0   U     202    0        0 eth0
--- end
Again, no default GW is set.

Someone an idea whats going wrong?

--
cu
hawe

--- SoupGate-Win32 v1.05