DHCP: Unterschied zwischen den Versionen

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 *[[DHCP Grundlagen]]
-= Einrichten eines DHCP-Servers auf Debian =
+*[[DHCP-Servers auf Debian]]
-== Installation ==
-* '''apt install isc-dhcp-server'''
-== Konfiguration der aktiven Netzwerkkarten ==
-* Zusätzlich wird hier die zu benutzende Daemon-Konfiguration angegeben
-* '''vim /etc/default/isc-dhcp-server'''
- DHCPDv4_CONF=/etc/dhcp/dhcpd.conf
- INTERFACESv4="''interface_1'' ''interface_2''"
-== Konfiguration der zu vergebenden Netzwerkparameter ==
-* '''vim /etc/dhcp/dhcpd.conf'''
- option domain-name "lab100.it";
- option domain-name-servers 10.0.100.254;
- default-lease-time 600;
- max-lease-time 7200;
- authoritative;
- # Subnet der ersten angegeben Netzwerkkarte
- subnet 10.0.100.0 netmask 255.255.255.0 {
-     range 10.0.100.50 10.0.100.100;
-     option routers 10.0.100.1;
- }
- # Subnet der zweiten angegeben Netzwerkkarte
- subnet 192.168.0.0 netmask 255.255.255.0 {
-     range 192.168.0.50 192.168.0.100;
-     option routers 192.168.0.1;
- }
- # Feste IP-Adresse für eine bestimmte MAC-Adresse
- host controller {
-     hardware ethernet fe:fe:fe:fe:fe:fe;
-     fixed-address 192.168.0.2;
-     option routers 192.168.0.1;
- }
-* Dienst mit der neuen Konfiguration starten und überprüfen
-* '''systemctl restart isc-dhcp-server'''
-* '''systemctl status isc-dhcp-server'''
-= Logs =
-* '''tail -f -n 100 /var/log/syslog | grep dhcp'''
- Apr 20 09:20:42 fw dhcpd[3217]: DHCPREQUEST for 10.0.100.51 (10.0.100.1) from be:98:60:d1:af:88 via ens19: wrong network.
- Apr 20 09:20:42 fw dhcpd[3217]: DHCPNAK on 10.0.100.51 to be:98:60:d1:af:88 via ens19
- Apr 20 09:20:43 fw dhcpd[3217]: reuse_lease: lease age 1 (secs) under 25% threshold, reply with unaltered, existing lease for 10.0.10.50
- Apr 20 09:20:43 fw dhcpd[3217]: DHCPDISCOVER from be:98:60:d1:af:88 (archiso) via ens19
- Apr 20 09:20:43 fw dhcpd[3217]: DHCPOFFER on 10.0.10.50 to be:98:60:d1:af:88 (archiso) via ens19
- Apr 20 09:20:43 fw dhcpd[3217]: reuse_lease: lease age 1 (secs) under 25% threshold, reply with unaltered, existing lease for 10.0.10.50
- Apr 20 09:20:43 fw dhcpd[3217]: DHCPREQUEST for 10.0.10.50 (10.0.10.1) from be:98:60:d1:af:88 (archiso) via ens19
- Apr 20 09:20:43 fw dhcpd[3217]: DHCPACK on 10.0.10.50 to be:98:60:d1:af:88 (archiso) via ens19
- Apr 20 09:22:27 fw dhcpd[3217]: DHCPDISCOVER from fe:fe:fe:fe:fe:fe via ens20
- Apr 20 09:22:27 fw dhcpd[3217]: DHCPOFFER on 192.168.0.2 to fe:fe:fe:fe:fe:fe via ens20
- Apr 20 09:22:27 fw dhcpd[3217]: DHCPREQUEST for 192.168.0.2 (192.168.0.1) from fe:fe:fe:fe:fe:fe via ens20
- Apr 20 09:22:27 fw dhcpd[3217]: DHCPACK on 192.168.0.2 to fe:fe:fe:fe:fe:fe via ens20
- Apr 20 09:23:41 fw dhcpd[3217]: DHCPDISCOVER from 76:54:06:7a:bd:48 via ens20
- Apr 20 09:23:42 fw dhcpd[3217]: DHCPOFFER on 192.168.0.50 to 76:54:06:7a:bd:48 (archiso) via ens20
- Apr 20 09:23:42 fw dhcpd[3217]: uid lease 192.168.0.50 for client 76:54:06:7a:bd:48 is duplicate on 192.168.0.0/24
- Apr 20 09:23:42 fw dhcpd[3217]: DHCPREQUEST for 192.168.0.53 (192.168.0.1) from 76:54:06:7a:bd:48 via ens20
- Apr 20 09:23:42 fw dhcpd[3217]: DHCPACK on 192.168.0.53 to 76:54:06:7a:bd:48 (archiso) via ens20
- Apr 20 09:25:07 fw dhcpd[3217]: DHCPRELEASE of 192.168.0.53 from 76:54:06:7a:bd:48 (archiso) via ens20 (found)
- Apr 20 09:28:03 fw dhcpd[3217]: DHCPREQUEST for 192.168.0.51 from 5e:12:1a:8d:b8:b6 via ens20
- Apr 20 09:28:03 fw dhcpd[3217]: DHCPACK on 192.168.0.51 to 5e:12:1a:8d:b8:b6 (debian) via ens20
- Apr 20 09:32:14 fw dhcpd[3217]: DHCPREQUEST for 192.168.0.51 from 5e:12:1a:8d:b8:b6 (debian) via ens20
- Apr 20 09:32:14 fw dhcpd[3217]: DHCPACK on 192.168.0.51 to 5e:12:1a:8d:b8:b6 (debian) via ens20
-= DHCP Anfragen über die Kommandozeile =
-* '''apt install isc-dhcp-common'''
-* Bei den folgenden Befehlen kann man auch eine spezifische Netzwerkkarte angeben
-== neue IP-Adresse anfragen ==
-* '''dhclient'''
-== Lease der IP-Adresse verlängern ==
-* '''dhclient -r'''

DHCP: Unterschied zwischen den Versionen

Version vom 12. Juni 2023, 06:41 Uhr

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