Ich habe um besser loggen zu können einen alten Debianserver reaktiviert und verwende diesen nun als DHCP-Server. Den der Fritz!Box habe ich ausgeschaltet. Das Problem bleibt bestehen, scheint also schonmal nicht am Router zu liegen. Der DHCP-Server hat nun die IP 192.168.178.10 und heißt rechner06.
Verbindungsaufbau über den kleinen Switch (schlägt fehl):
DHCP-Server:
12:14:44.263694 B 00:22:15:58:1d:12 ethertype IPv4 (0x0800), length 344: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from 00:22:15:58:1d:12, length 300, xid 0x123dd947, Flags [none] (0x0000)
Client-Ethernet-Address 00:22:15:58:1d:12
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Discover
Hostname Option 12, length 9: "rechner00"
Parameter-Request Option 55, length 18:
Subnet-Mask, BR, Time-Zone, Default-Gateway
Domain-Name, Domain-Name-Server, Option 119, Hostname
Netbios-Name-Server, Netbios-Scope, MTU, Classless-Static-Route
NTP, Classless-Static-Route, Classless-Static-Route-Microsoft, Static-Route
Option 252, NTP
END Option 255, length 0
PAD Option 0, length 0, occurs 25
12:14:44.264043 Out 00:20:0c:24:52:78 ethertype IPv4 (0x0800), length 344: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328)
192.168.178.10.67 > 192.168.178.25.68: [udp sum ok] BOOTP/DHCP, Reply, length 300, xid 0x123dd947, Flags [none] (0x0000)
Your-IP 192.168.178.25
Client-Ethernet-Address 00:22:15:58:1d:12
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Offer
Server-ID Option 54, length 4: 192.168.178.10
Lease-Time Option 51, length 4: 600
Subnet-Mask Option 1, length 4: 255.255.255.0
Default-Gateway Option 3, length 4: 192.168.178.1
Domain-Name Option 15, length 9: "fritz.box"
Domain-Name-Server Option 6, length 4: 8.8.8.8
END Option 255, length 0
PAD Option 0, length 0, occurs 15
/var/log/syslog:
Sep 25 12:30:05 rechner06 dhcpd: DHCPDISCOVER from 00:22:15:58:1d:12 (rechner00) via eth1
Sep 25 12:30:05 rechner06 dhcpd: DHCPOFFER on 192.168.178.25 to 00:22:15:58:1d:12 (rechner00) via eth1
Am Client kommt auf Port 67/68 nichts an.
Verbindungsaufbau ohne den kleinen Switch (funktioniert):
DHCP-Server:
12:22:44.758220 B 00:22:15:58:1d:12 ethertype IPv4 (0x0800), length 344: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328)
0.0.0.0.68 > 255.255.255.255.67: [udp sum ok] BOOTP/DHCP, Request from 00:22:15:58:1d:12, length 300, xid 0x888c94d, Flags [none] (0x0000)
Client-Ethernet-Address 00:22:15:58:1d:12
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Request
Requested-IP Option 50, length 4: 192.168.178.25
Hostname Option 12, length 9: "rechner00"
Parameter-Request Option 55, length 18:
Subnet-Mask, BR, Time-Zone, Default-Gateway
Domain-Name, Domain-Name-Server, Option 119, Hostname
Netbios-Name-Server, Netbios-Scope, MTU, Classless-Static-Route
NTP, Classless-Static-Route, Classless-Static-Route-Microsoft, Static-Route
Option 252, NTP
END Option 255, length 0
PAD Option 0, length 0, occurs 19
12:22:45.141288 Out 00:20:0c:24:52:78 ethertype IPv4 (0x0800), length 344: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328)
192.168.178.10.67 > 192.168.178.25.68: [udp sum ok] BOOTP/DHCP, Reply, length 300, xid 0x888c94d, Flags [none] (0x0000)
Your-IP 192.168.178.25
Client-Ethernet-Address 00:22:15:58:1d:12
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: ACK
Server-ID Option 54, length 4: 192.168.178.10
Lease-Time Option 51, length 4: 600
Subnet-Mask Option 1, length 4: 255.255.255.0
Default-Gateway Option 3, length 4: 192.168.178.1
Domain-Name Option 15, length 9: "fritz.box"
Domain-Name-Server Option 6, length 4: 8.8.8.8
END Option 255, length 0
PAD Option 0, length 0, occurs 15
/var/log/syslog:
Sep 25 12:27:02 rechner06 dhcpd: DHCPREQUEST for 192.168.178.25 from 00:22:15:58:1d:12 (rechner00) via eth1
Sep 25 12:27:02 rechner06 dhcpd: DHCPACK on 192.168.178.25 to 00:22:15:58:1d:12 (rechner00) via eth1
Client:
12:17:51.265438 In 00:20:0c:24:52:78 ethertype IPv4 (0x0800), length 344: (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328)
192.168.178.10.67 > 192.168.178.25.68: [udp sum ok] BOOTP/DHCP, Reply, length 300, xid 0x34182d7b, Flags [none] (0x0000)
Your-IP 192.168.178.25
Client-Ethernet-Address 00:22:15:58:1d:12
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: ACK
Server-ID Option 54, length 4: 192.168.178.10
Lease-Time Option 51, length 4: 600
Subnet-Mask Option 1, length 4: 255.255.255.0
Default-Gateway Option 3, length 4: 192.168.178.1
Domain-Name Option 15, length 9: "fritz.box"
Domain-Name-Server Option 6, length 4: 8.8.8.8