6
votes
Accepted
Setting up an Access Point, Raspberry Pi, and Laptop to serve a website in a classroom. "The internet in a suitcase"
That all sounds like a perfectly sensible solution to your problem, and you've more or less answered your own questions correctly already.
Specifically:
I am not sure how the Raspberry Pi knows that ...
- 2,622
4
votes
Two DHCP, One PXE
DHCP could not be "pxe-enabled". Network booting is not a DHCP duty. The only role DHCP takes in this is to present a client an information about boot file server address and boot ...
- 9,483
3
votes
Accepted
Should my device combine local DNS and static DNS?
You should always use DHCP assigned DNS name servers.
If the customer has misconfigured those, then the customer likely experiences other networking related issues too, and the customer should fix ...
- 36.1k
3
votes
Accepted
Can DHCP Option121 work with DHCP Option3 together?
"If the DHCP server returns both a Classless Static Routes option and a Router option, the DHCP client MUST ignore the Router option."
https://www.rfc-editor.org/rfc/rfc3442.html
- 576
2
votes
Setting up LAN gateway for school club network - "No subnet declaration for enp3s0"
You obviously have configured enp3s0 to automatic configuration, so it tries to get an IP address via DHCP but fails; this is why it auto assigns the 169.254.151.221/16 address. In order to use this ...
- 141
2
votes
ESXi using DHCP, IP is accessible, Host Name isn't
The DHCP is probably receiving the Hostname from the ESX. But this doesn't mean that your DHCP-Server is even configured/allowed to updated the DNS-Server in your Network.
Easiest way to resolve this ...
- 61
2
votes
Debian 11 no longer automatically receiving static DHCP IP address, dhclient must be started manually
This problem is addressed in the article: Strange extra long Linux MAC address in DHCP active leases.
Basically, in /etc/dhcp/dhclient.conf, add the line:
send dhcp-client-identifier = hardware;
- 21
1
vote
Accepted
Same FQDN for different IP depending on connection
So, different IP means different DNS names
Or a dynamically updated DNS name. Windows machines do it all the time – all AD domain members send RFC2136 "UPDATE" messages towards the ...
- 9,301
1
vote
PXE with proxyDHCP server: What makes a DHCP client accept / ignore offers from primary DHCP?
The ignored offer provides:
Your (client) IP address: 172.17.34.1 << offered IP address
Next server IP address: 172.17.34.30 << TFTP Server IP
Boot file name **not given** ...
- 3,409
1
vote
How to set kvm to use router's dhcp in linux?
What you'd need to do first is to put your hypervisor's network on a bridged interface that the VMs can connect to.
Let's say this is going to be br0 and the current physical interface is eth0.
Any IP ...
- 7,718
1
vote
Two DHCP, One PXE
Having 2 active DHCP servers targeting he same sub-network w/o MAC filters leads to uncertainty and that's not a good idea. If you need high availability/redundancy just use a high availability DHCP ...
- 3,409
1
vote
Unable to access server using ssh after setting a static ip in alpine Linux
The netmask in the ip config output is still a /24 subnetmask.
Please verify that. Maybe you need to reboot.
Please check the routing as well
ip route
- 13
1
vote
how to know device IP is static or dhcp on linux dhcp server
You can use the ip tool. This tells your whether the IP is dynamic or not.
Below is an example output which shows the keyword dynamic. This means there was some dynamic process (e.g. DHCP) to fetch ...
- 21
1
vote
Trouble connecting to the internet with direct connection to the modem
The way I seen your post is; you expect the broadband modem to be act as a router.
The fact you receive no IP make me think the modem is in bridge mode. While it's not what you want, I strongly ...
- 16.6k
1
vote
Disable the automatic adding of routes by DHCP
If you want to override the default route you could try statically defining the more specific 0.0.0.0/1 and 128.0.0.0/1 with your wireguard IP as the gateway?
- 51
1
vote
Accepted
How do I install dhcp plugin for Strongswan on Ubuntu focal
You need to install the libcharon-extra-plugins package because the plugin is technically located in libcharon (note that the other two packages you reference are actually called libstrongswan-...-...
- 3,870
1
vote
Is it possible to save DHCP reservations to disk so they can be restored after rebooting Linksys AX5400 router
Actually there is a backup/restore option on the Admin page of the router that I missed. Neither the documentation nor tech support mentioned this.
Sorry for bothering the group.
- 105
1
vote
DHCP Server Not Registering PTR Records - Multiple DHCP Servers
Solved it by updating the credentials in DHCP server for the branch office - it was not actually related to multiple subnets.
(Right-click on IPv4 under the domain name in DCHP Server, select Advanced ...
- 381
1
vote
Windows DHCP Server does not give correct IP
If someone interested, the problem is the DHCP server had configured a superscope:
Stop DHCP client from receiving old IP address on new VLAN
Once I deleted the superscope the service works fine.
...
- 21
1
vote
DHCP not working for bridged QEMU virtual machine
I promised to formulate my comment which solved the problem in the form of an answer and forgot. Shame on me. Let me fix that already; @DouglasSu please accept for future readers to be aware of the ...
- 9,483
1
vote
Accepted
Why aren't inherited scope options replicating between Win2019 DHCP servers in a failover config?
I think it's a bug, I just encountered it in 2022 so it's not fixed. You can use DFACS and set a scheduled task to automate it.
https://sjohnonline.blogspot.com/2018/12/dhcp-failover-auto-config-sync-...
- 26
1
vote
Configure multiple search suffix domains in Unifi Security Gateway (dhcp option 119 domain search)
You can now do this in v2.0.9-hotfix.6, but I haven't been able to find the answer anywhere. Here's what worked for me:
configure
set service dhcp-server shared-network-name [your dhcp network name] ...
- 11
1
vote
Can't start isc-dhcp-server because of the Error : Not configured to listen on any interfaces
As suggested in NeoGeek's answer, I had to add the interface to the /etc/default/isc-dhcp-server. ("enp4s0" in my case, as shown by ip addr)
INTERFACESv4="enp4s0"
But systemctl ...
- 3,727
1
vote
How can I assign an IP by UID in DHCPd
It is possible by using DUID-UUID.
On the server side it is required to identify the host by option dhcp-client-identifier like below:
host example {
option dhcp-client-identifier FF:II:II:II:II:00:...
- 3,305
1
vote
Multiple DHCP relay servers after one another?
Once the DHCP relay gateway address is populated on a DHCP Request, other DHCP Relays are not allowed to modify the DHCP relay gateway. The DHCP Request will be forwarded to the DHCP server by any ...
- 11
1
vote
Domain connection shows as "unauthenticated"
I had this happen to a customer today and none of the above fixed the issue.
It turns out some November 2022 patches were the culprit. To fix the issue, I first followed the instructions on this blog:
...
- 155
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