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linux_router:ipoe [2025-01-04 Sat wk01 17:40] – [Firewall Modifications] baumkplinux_router:ipoe [2025-01-04 Sat wk01 18:36] (current) – [References] baumkp
Line 71: Line 71:
   *To manual request a dhcp lease connection on eno1: ''sudo dhclient -4 eno1'' , the ''-4'' flag restricts operation to IPv4.    *To manual request a dhcp lease connection on eno1: ''sudo dhclient -4 eno1'' , the ''-4'' flag restricts operation to IPv4. 
 ++++ ++++
 +
 +++++dhclient negoitiation|
 +
 +''sudo journalctl -b | grep dh*''
 +
 +<code>Jan 04 07:34:29 kptr dhclient[763]: Internet Systems Consortium DHCP Client 4.4.3-P1
 +Jan 04 07:34:29 kptr ifup[763]: For info, please visit https://www.isc.org/software/dhcp/
 +Jan 04 07:34:29 kptr dhclient[763]: Copyright 2004-2022 Internet Systems Consortium.
 +Jan 04 07:34:29 kptr dhclient[763]: All rights reserved.
 +Jan 04 07:34:29 kptr dhclient[763]: For info, please visit https://www.isc.org/software/dhcp/
 +Jan 04 07:34:29 kptr dhclient[763]: 
 +Jan 04 07:34:29 kptr dhclient[763]: Listening on LPF/enp1s0/00:e2:59:01:7d:ab
 +Jan 04 07:34:29 kptr dhclient[763]: Sending on   LPF/enp1s0/00:e2:59:01:7d:ab
 +Jan 04 07:34:29 kptr dhclient[763]: Sending on   Socket/fallback
 +Jan 04 07:34:29 kptr dhclient[763]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 8
 +Jan 04 07:34:37 kptr dhclient[763]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 11
 +Jan 04 07:34:49 kptr dhclient[763]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 18
 +Jan 04 07:35:07 kptr dhclient[763]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 12
 +Jan 04 07:35:19 kptr dhclient[763]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 11
 +Jan 04 07:35:30 kptr dhclient[763]: No DHCPOFFERS received.
 +Jan 04 07:35:30 kptr dhclient[763]: No working leases in persistent database - sleeping.
 +Jan 04 07:39:48 kptr dhclient[763]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 8
 +Jan 04 07:39:56 kptr dhclient[763]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 10
 +Jan 04 07:40:06 kptr dhclient[763]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 9
 +Jan 04 07:40:15 kptr dhclient[763]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 15
 +Jan 04 07:40:30 kptr dhclient[763]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 8
 +Jan 04 07:40:38 kptr dhclient[763]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 11
 +Jan 04 07:40:49 kptr dhclient[763]: No DHCPOFFERS received.
 +Jan 04 07:40:49 kptr dhclient[763]: No working leases in persistent database - sleeping.
 +Jan 04 07:44:30 kptr dhclient[763]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 6
 +Jan 04 07:44:30 kptr dhclient[763]: DHCPOFFER of 202.7.254.38 from 202.7.254.1
 +Jan 04 07:44:30 kptr dhclient[763]: DHCPREQUEST for 202.7.254.38 on enp1s0 to 255.255.255.255 port 67
 +Jan 04 07:44:30 kptr dhclient[763]: DHCPACK of 202.7.254.38 from 202.7.254.1
 +Jan 04 07:44:30 kptr dhclient[763]: bound to 202.7.254.38 -- renewal in 264 seconds.
 +Jan 04 07:47:33 kptr sudo[2504]:   baumkp : TTY=tty1 ; PWD=/home/baumkp ; USER=root ; COMMAND=/usr/sbin/dhclient
 +Jan 04 07:47:33 kptr dhclient[2507]: DHCPDISCOVER on vnet0 to 255.255.255.255 port 67 interval 5
 +Jan 04 07:47:33 kptr dhclient[2507]: DHCPDISCOVER on br0 to 255.255.255.255 port 67 interval 6
 +Jan 04 07:47:33 kptr dhclient[2507]: DHCPDISCOVER on enp8s0 to 255.255.255.255 port 67 interval 5
 +Jan 04 07:47:33 kptr dhclient[2507]: DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 3
 +Jan 04 07:47:33 kptr dhclient[2507]: DHCPDISCOVER on enp7s0 to 255.255.255.255 port 67 interval 6
 +Jan 04 07:47:33 kptr dhclient[2507]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 5
 +Jan 04 07:47:33 kptr dhclient[2507]: DHCPOFFER of 192.168.1.100 from 192.168.1.2
 +Jan 04 07:47:33 kptr dhclient[2507]: DHCPREQUEST for 192.168.1.100 on br0 to 255.255.255.255 port 67
 +Jan 04 07:47:33 kptr dhclient[2507]: DHCPOFFER of 192.168.1.102 from 192.168.1.2
 +Jan 04 07:47:33 kptr dhclient[2507]: DHCPREQUEST for 192.168.1.102 on vnet0 to 255.255.255.255 port 67
 +Jan 04 07:47:33 kptr dhclient[2507]: DHCPACK of 192.168.1.100 from 192.168.1.2
 +Jan 04 07:47:33 kptr dhclient[2507]: bound to 192.168.1.100 -- renewal in 953 seconds.
 +Jan 04 07:47:33 kptr dhclient[2507]: DHCPACK of 192.168.1.102 from 192.168.1.2
 +Jan 04 07:47:33 kptr dhclient[2507]: bound to 192.168.1.102 -- renewal in 754 seconds.
 +Jan 04 07:47:37 kptr dhclient[2507]: DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 5
 +Jan 04 07:47:38 kptr dhclient[2587]: Internet Systems Consortium DHCP Client 4.4.3-P1
 +Jan 04 07:47:38 kptr dhclient[2587]: Copyright 2004-2022 Internet Systems Consortium.
 +Jan 04 07:47:38 kptr dhclient[2587]: All rights reserved.
 +Jan 04 07:47:38 kptr dhclient[2587]: For info, please visit https://www.isc.org/software/dhcp/
 +Jan 04 07:47:38 kptr dhclient[2587]: Unknown command: --usage
 +Jan 04 07:47:38 kptr dhclient[2587]: Usage: dhclient [-4|-6] [-SNTPRI1dvrxi] [-nw] [-p <port>] [-D LL|LLT]
 +                                            dhclient {--version|--help|-h}
 +Jan 04 07:47:38 kptr dhclient[2587]: 
 +Jan 04 07:47:38 kptr dhclient[2587]: If you think you have received this message due to a bug rather
 +Jan 04 07:47:38 kptr dhclient[2587]: than a configuration issue please read the section on submitting
 +Jan 04 07:47:38 kptr dhclient[2587]: bugs on either our web page at www.isc.org or in the README file
 +Jan 04 07:47:38 kptr dhclient[2587]: before submitting a bug.  These pages explain the proper
 +Jan 04 07:47:38 kptr dhclient[2587]: process and the information we find helpful for debugging.
 +Jan 04 07:47:38 kptr dhclient[2587]: 
 +Jan 04 07:47:38 kptr dhclient[2587]: exiting.
 +Jan 04 07:47:38 kptr dhclient[2597]: Internet Systems Consortium DHCP Client 4.4.3-P1
 +Jan 04 07:47:38 kptr dhclient[2597]: Copyright 2004-2022 Internet Systems Consortium.
 +Jan 04 07:47:38 kptr dhclient[2597]: All rights reserved.
 +Jan 04 07:47:38 kptr dhclient[2597]: For info, please visit https://www.isc.org/software/dhcp/
 +Jan 04 07:47:38 kptr dhclient[2597]: Unknown command: --usage
 +Jan 04 07:47:38 kptr dhclient[2597]: Usage: dhclient [-4|-6] [-SNTPRI1dvrxi] [-nw] [-p <port>] [-D LL|LLT]
 +                                            dhclient {--version|--help|-h}
 +Jan 04 07:47:38 kptr dhclient[2597]: 
 +Jan 04 07:47:38 kptr dhclient[2597]: If you think you have received this message due to a bug rather
 +Jan 04 07:47:38 kptr dhclient[2597]: than a configuration issue please read the section on submitting
 +Jan 04 07:47:38 kptr dhclient[2597]: bugs on either our web page at www.isc.org or in the README file
 +Jan 04 07:47:38 kptr dhclient[2597]: before submitting a bug.  These pages explain the proper
 +Jan 04 07:47:38 kptr dhclient[2597]: process and the information we find helpful for debugging.
 +Jan 04 07:47:38 kptr dhclient[2597]: 
 +Jan 04 07:47:38 kptr dhclient[2597]: exiting.
 +Jan 04 07:47:38 kptr dhclient[2507]: DHCPDISCOVER on enp8s0 to 255.255.255.255 port 67 interval 5
 +Jan 04 07:47:38 kptr sudo[2603]:   baumkp : TTY=tty1 ; PWD=/home/baumkp ; USER=root ; COMMAND=/usr/sbin/dhclient -h
 +Jan 04 07:47:39 kptr dhclient[2507]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 10
 +Jan 04 07:47:39 kptr dhclient[2507]: DHCPDISCOVER on enp7s0 to 255.255.255.255 port 67 interval 14
 +Jan 04 07:47:42 kptr dhclient[2507]: DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 14
 +Jan 04 07:47:43 kptr dhclient[2507]: DHCPDISCOVER on enp8s0 to 255.255.255.255 port 67 interval 6
 +Jan 04 07:47:49 kptr dhclient[2507]: DHCPDISCOVER on enp8s0 to 255.255.255.255 port 67 interval 6
 +Jan 04 07:47:49 kptr dhclient[2507]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 16
 +Jan 04 07:47:53 kptr dhclient[2507]: DHCPDISCOVER on enp7s0 to 255.255.255.255 port 67 interval 8
 +Jan 04 07:47:55 kptr dhclient[2639]: Internet Systems Consortium DHCP Client 4.4.3-P1
 +Jan 04 07:47:55 kptr dhclient[2639]: Copyright 2004-2022 Internet Systems Consortium.
 +Jan 04 07:47:55 kptr dhclient[2639]: All rights reserved.
 +Jan 04 07:47:55 kptr dhclient[2639]: For info, please visit https://www.isc.org/software/dhcp/
 +Jan 04 07:47:55 kptr dhclient[2639]: Unknown command: --usage
 +Jan 04 07:47:55 kptr dhclient[2639]: Usage: dhclient [-4|-6] [-SNTPRI1dvrxi] [-nw] [-p <port>] [-D LL|LLT]
 +                                            dhclient {--version|--help|-h}
 +Jan 04 07:47:55 kptr dhclient[2639]: 
 +Jan 04 07:47:55 kptr dhclient[2639]: If you think you have received this message due to a bug rather
 +Jan 04 07:47:55 kptr dhclient[2639]: than a configuration issue please read the section on submitting
 +Jan 04 07:47:55 kptr dhclient[2639]: bugs on either our web page at www.isc.org or in the README file
 +Jan 04 07:47:55 kptr dhclient[2639]: before submitting a bug.  These pages explain the proper
 +Jan 04 07:47:55 kptr dhclient[2639]: process and the information we find helpful for debugging.
 +Jan 04 07:47:55 kptr dhclient[2639]: 
 +Jan 04 07:47:55 kptr dhclient[2639]: exiting.
 +Jan 04 07:47:55 kptr dhclient[2507]: DHCPDISCOVER on enp8s0 to 255.255.255.255 port 67 interval 8
 +Jan 04 07:47:56 kptr sudo[2645]:   baumkp : TTY=tty1 ; PWD=/home/baumkp ; USER=root ; COMMAND=/usr/sbin/dhclient --help
 +Jan 04 07:47:56 kptr dhclient[2507]: DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 18
 +Jan 04 07:48:01 kptr dhclient[2507]: DHCPDISCOVER on enp7s0 to 255.255.255.255 port 67 interval 12
 +Jan 04 07:48:03 kptr dhclient[2507]: DHCPDISCOVER on enp8s0 to 255.255.255.255 port 67 interval 8
 +Jan 04 07:48:05 kptr dhclient[2507]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 19
 +Jan 04 07:48:11 kptr dhclient[2507]: DHCPDISCOVER on enp8s0 to 255.255.255.255 port 67 interval 14
 +Jan 04 07:48:13 kptr dhclient[2507]: DHCPDISCOVER on enp7s0 to 255.255.255.255 port 67 interval 10
 +Jan 04 07:48:14 kptr dhclient[2507]: DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 11
 +Jan 04 07:48:23 kptr dhclient[2507]: DHCPDISCOVER on enp7s0 to 255.255.255.255 port 67 interval 9
 +Jan 04 07:48:24 kptr dhclient[2507]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 10
 +Jan 04 07:48:25 kptr dhclient[2507]: DHCPDISCOVER on enp8s0 to 255.255.255.255 port 67 interval 9
 +Jan 04 07:48:25 kptr dhclient[2507]: DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 9
 +Jan 04 07:48:32 kptr dhclient[2507]: DHCPDISCOVER on enp7s0 to 255.255.255.255 port 67 interval 2
 +Jan 04 07:48:34 kptr dhclient[2507]: No DHCPOFFERS received.
 +Jan 04 07:48:34 kptr dhclient[2507]: No working leases in persistent database - sleeping.
 +Jan 04 07:48:34 kptr dhclient[2507]: No DHCPOFFERS received.
 +Jan 04 07:48:34 kptr dhclient[2507]: No working leases in persistent database - sleeping.
 +Jan 04 07:48:34 kptr dhclient[2507]: No DHCPOFFERS received.
 +Jan 04 07:48:34 kptr dhclient[2507]: No working leases in persistent database - sleeping.
 +Jan 04 07:48:34 kptr dhclient[2507]: No DHCPOFFERS received.
 +Jan 04 07:48:34 kptr dhclient[2507]: No working leases in persistent database - sleeping.
 +Jan 04 07:48:54 kptr dhclient[763]: DHCPREQUEST for 202.7.254.38 on enp1s0 to 202.7.254.1 port 67
 +Jan 04 07:48:54 kptr dhclient[763]: DHCPACK of 202.7.254.38 from 202.7.254.1
 +Jan 04 07:48:54 kptr dhclient[763]: bound to 202.7.254.38 -- renewal in 285 seconds.
 +Jan 04 07:53:02 kptr dhclient[2507]: DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 4
 +Jan 04 07:53:06 kptr dhclient[2507]: DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 6
 +Jan 04 07:53:12 kptr dhclient[2507]: DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 13
 +Jan 04 07:53:12 kptr dhclient[2507]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 3
 +Jan 04 07:53:15 kptr dhclient[2507]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 5
 +Jan 04 07:53:20 kptr dhclient[2507]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 10
 +Jan 04 07:53:25 kptr dhclient[2507]: DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 17
 +Jan 04 07:53:30 kptr dhclient[2507]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 10
 +Jan 04 07:53:39 kptr dhclient[763]: DHCPREQUEST for 202.7.254.38 on enp1s0 to 202.7.254.1 port 67
 +Jan 04 07:53:39 kptr dhclient[763]: DHCPACK of 202.7.254.38 from 202.7.254.1
 +Jan 04 07:53:39 kptr dhclient[763]: bound to 202.7.254.38 -- renewal in 274 seconds.
 +Jan 04 07:53:40 kptr dhclient[2507]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 12
 +Jan 04 07:53:42 kptr dhclient[2507]: DHCPDISCOVER on enp2s0 to 255.255.255.255 port 67 interval 21
 +Jan 04 07:53:52 kptr dhclient[2507]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 15
 +Jan 04 07:54:03 kptr dhclient[2507]: No DHCPOFFERS received.
 +Jan 04 07:54:03 kptr dhclient[2507]: No working leases in persistent database - sleeping.
 +Jan 04 07:54:07 kptr dhclient[2507]: DHCPDISCOVER on enp1s0 to 255.255.255.255 port 67 interval 6
 +Jan 04 07:54:13 kptr dhclient[2507]: No DHCPOFFERS received.
 +Jan 04 07:54:13 kptr dhclient[2507]: No working leases in persistent database - sleeping.
 +Jan 04 07:55:10 kptr dhclient[2507]: DHCPDISCOVER on enp7s0 to 255.255.255.255 port 67 interval 6
 +Jan 04 07:55:16 kptr dhclient[2507]: DHCPDISCOVER on enp7s0 to 255.255.255.255 port 67 interval 17
 +Jan 04 07:55:33 kptr dhclient[2507]: DHCPDISCOVER on enp7s0 to 255.255.255.255 port 67 interval 20
 +Jan 04 07:55:39 kptr dhclient[2507]: DHCPDISCOVER on enp8s0 to 255.255.255.255 port 67 interval 7
 +Jan 04 07:55:46 kptr dhclient[2507]: DHCPDISCOVER on enp8s0 to 255.255.255.255 port 67 interval 18
 +Jan 04 07:55:53 kptr dhclient[2507]: DHCPDISCOVER on enp7s0 to 255.255.255.255 port 67 interval 8
 +Jan 04 07:56:01 kptr dhclient[2507]: DHCPDISCOVER on enp7s0 to 255.255.255.255 port 67 interval 10
 +Jan 04 07:56:04 kptr dhclient[2507]: DHCPDISCOVER on enp8s0 to 255.255.255.255 port 67 interval 11
 +Jan 04 07:56:11 kptr dhclient[2507]: No DHCPOFFERS received.
 +Jan 04 07:56:11 kptr dhclient[2507]: No working leases in persistent database - sleeping.
 +Jan 04 07:56:15 kptr dhclient[2507]: DHCPDISCOVER on enp8s0 to 255.255.255.255 port 67 interval 12
 +Jan 04 07:56:27 kptr dhclient[2507]: DHCPDISCOVER on enp8s0 to 255.255.255.255 port 67 interval 7
 +Jan 04 07:56:34 kptr dhclient[2507]: DHCPDISCOVER on enp8s0 to 255.255.255.255 port 67 interval 6
 +Jan 04 07:56:40 kptr dhclient[2507]: No DHCPOFFERS received.
 +Jan 04 07:56:40 kptr dhclient[2507]: No working leases in persistent database - sleeping.
 +Jan 04 07:58:13 kptr dhclient[763]: DHCPREQUEST for 202.7.254.38 on enp1s0 to 202.7.254.1 port 67
 +Jan 04 07:58:13 kptr dhclient[763]: DHCPACK of 202.7.254.38 from 202.7.254.1
 +Jan 04 07:58:13 kptr dhclient[763]: bound to 202.7.254.38 -- renewal in 284 seconds.</code> ++++
  
 ====Firewall Modifications==== ====Firewall Modifications====
Line 83: Line 249:
   *[[https://manpages.debian.org/unstable/ifupdown/interfaces.5.en.html#The_dhcp_Method|The_dhcp_Method]]   *[[https://manpages.debian.org/unstable/ifupdown/interfaces.5.en.html#The_dhcp_Method|The_dhcp_Method]]
   *[[https://www.computerhope.com/unix/dhclient.htm|Linux dhclient command]]   *[[https://www.computerhope.com/unix/dhclient.htm|Linux dhclient command]]
 +  *[[https://www.computernetworkingnotes.com/ccna-study-guide/how-dhcp-works-explained-with-examples.html|How DHCP works Explained with Examples]]
 +  *[[http://www.tcpipguide.com/free/t_DHCPLeaseRenewalandRebindingProcesses-2.htm|DHCP Lease Renewal and Rebinding Processes]]
  
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