All Questions
Tagged with dhcp networking
949
questions
69
votes
2
answers
123k
views
What is the difference between ARP binding and DHCP address reservation?
In my TL-WR1043ND I have these functionalities and both of them pair an IP address to a MAC address. What is the difference?
I read that ARP is for security reasons, others say it is for Wake-on-LAN. ...
- 5,234
55
votes
8
answers
327k
views
How to force Windows 7 to ask for a "fresh" IP address from DHCP server?
I'm troubleshooting a certain issue with my DHCP configuration, and need my Windows machine to ask for a "fresh" IP address, so I can see which address DHCP server gives by default.
When I do ...
- 22.7k
51
votes
6
answers
11k
views
Why is a router needed?
I‘ve been trying to figure out why a router is needed. I know a router can be used for DHCP and some other things, but I’m just thinking of networking with static IPs. So the following:
Is it ...
- 621
44
votes
4
answers
14k
views
How does a router obtain its IP address?
So let's assume I connect a secondary router to my first. An Ethernet cable from one of the LAN ports to the secondary router's WAN.
Now, how does my secondary router actual obtain its IP address? ...
- 542
35
votes
1
answer
58k
views
How to request a specific IP address from DHCP server?
How to request a specific IP address from DHCP server?
This question also touches the topic of DHCP address reservation in a router.
Background: My home routers DHCP table only allows to create an ...
- 814
31
votes
6
answers
74k
views
Check if a DHCP server existing in my network using bash
using CentOS with static IP, Is there any way to determinate if a DHCP server running on the network using bash ?
- 533
27
votes
3
answers
53k
views
Wrong IP address from DHCP client on Ubuntu 18.04
I'm experiencing a weird issue where my Ubuntu 18.04 (server) box gets issued a wrong IP address during boot from the DHCP server. Running dhclient after boot on the interface results in the right IP ...
- 782
26
votes
8
answers
96k
views
Why is my subnet mask 255.255.255.255?
I have a modem which used for internet broadband and I got an IP address in the 'A' class 10.x.x.x and have netmask 255.255.255.255.
What does 255.255.255.255 mean exactly?
When I try to sniff with ...
- 491
22
votes
1
answer
54k
views
Does the DHCP server know about static IP addresses set in end devices?
I have a simple setup up at home with a vendor provided ADSL router and a few home devices I connect to it to connect to the outside world. I would like one of my devices to have a static internal IP ...
- 937
21
votes
7
answers
57k
views
Using dnsmasq with NetworkManager
It was well known that NetworkManager does not play well with dnsmasq (ref: here). I've skimmed throught the lengthy discussion here but still not sure what the recommended way to deal with the ...
- 8,851
18
votes
2
answers
10k
views
How do DHCP clients know which of multiple DHCPOFFERS to accept?
Imagine we have a network like in the picture. Six hosts on one layer 2 network, no VLANs. The network is supposed to be segmented into two subnets, with one DHCP server each. The DHCP servers have ...
- 305
18
votes
7
answers
88k
views
Is there a way to disable the DHCP client in Raspbian Linux on a Rasperry Pi?
I have a Linux server (Rasperry Pi using Raspbian as OS) that should be using only static IP.
However I noticed that it also has got IP from DHCP server (The IP given out by DHCP is 192.168.111.2). ...
- 1,197
18
votes
1
answer
4k
views
Did my network just get hacked?
Something very strange just happened. A long story short, I went on to my computer and it told me that access was blocked to this PC. So I tried to go to 192.168.1.1, but it didn't work on my blocked ...
- 181
17
votes
6
answers
148k
views
Can I chain two routers together keeping DHCP on both?
I have read that I can connect a second router by turning off DHCP and NAT, but I want the second router to assign DNS (I'm using it as an access point for my kids, and will use OpenDNS family service ...
- 970
17
votes
3
answers
15k
views
Unable to resolve .foo.local domain names
My workplace has an intranet with domain names like server01.foo.local, server02.foo.local, etc. I recently booted the Fedora 16 live environment to test it out and discovered that these domain names ...
- 273