All Questions
101
questions
4
votes
3
answers
22k
views
How do I create a DHCP address reservation for an Internet Connection Sharing client?
I have Internet Connection Sharing enabled on a Windows computer that's hosting the Internet connection. I have manually assigned what IP address to be used with the DHCP service on the host by ...
0
votes
0
answers
47
views
Access Point ip address is different in Web UI than what router shows
I have an Edgerouter X as router and a Fritzbox as access point. The ER-X shows a different ip address for the fritzbox than what the fritzbox itself show in its own network settings. Also the ...
- 101
0
votes
0
answers
622
views
Issues when setting up static IP on Debian bookworm
I have recently started hosting my server from my PC and everything worked perfectly until my public IP changed. I taught I have successfully setup a static IP but I didn't. Now I am in a loop of ...
- 1
0
votes
1
answer
64
views
Do DHCP and IP depend on each other?
DHCP is a protocol at the application layer, so it must depend on the IP protocol in the network layer. But the IP protocol requires assignment of IP addresses to network interfaces, which is the job ...
- 465k
0
votes
1
answer
311
views
block RFC1918 networks in pFsense for LAN seems not to work
Description of the issue: I've created a rule inside pFsense to block any traffic directed at RFC1918 originating from my OPT1 network, and it works fine. Now when I open terminal on OPT1 network PC I ...
- 465k
-1
votes
1
answer
466
views
Two-routers with devices that share same IP? [closed]
If I connect two routers via ethernet, I can have to W-LANS.
I'm not sure about many things with this configuration.
These questions come to my mind that I couldn't wrap my head around:
So would I ...
- 62.4k
0
votes
0
answers
243
views
Open Media Vault DHCP IP not showing on Router's connected devices
I've currently got a media server set up and working on my local network. It's running openmediavault.
It connects to the network correctly and can be accesed from any other machine on the network ...
- 101
6
votes
3
answers
24k
views
What is the "Alternate Configuration" tab in TCP/IP settings
As I know there is two choice for configuring a computer IP address in the network. Assigning a Static IP or obtaining a dynamic IP from a DHCP server.
But what is the Alternate Configuration in ...
- 1,429
0
votes
1
answer
621
views
Custom subnet mask while using DHCP
I'm trying to connect to an RPI on the same physical network over SSH. Normally, I'd do this with a simple ip a, ssh xxx@ip, but because of the network it doesn't work. There are several problems:
...
- 1
1
vote
1
answer
157
views
Macvtap connectivity lost after a few hours?
I setup a macvtap interface like this:
ip link add link eth0 vlan type macvlan mode bridge
ip address add 10.0.0.17 dev vlan
ip link set dev vlan up
ip route flush dev eth0
ip route flush dev vlan
ip ...
- 593
0
votes
3
answers
480
views
What is the relationship between my public IP address and the address assigned to my NIC?
When I run an online IP-lookup tool, like https://whatismyipaddress.com/, I get an IP address like 24.253.65.208.
But I've set up my home router as a DHCP Server and I've assigned static IP addresses ...
- 465k
0
votes
0
answers
89
views
Determine/Configure which IP address gets offered next by a DHCP server?
I need a way to determine the next IP address a DHCP server will offer.
RFC 2131 states:
Each server may respond with a DHCPOFFER message that includes an available network address in the 'yiaddr' ...
- 13
0
votes
1
answer
149
views
Windows Home Server running for the first time in years - How to find out its IP address?
Several years ago I used a small Acer Windows Home Server. I have not used this device in years. Now I would like to access it again to see what data is still on it.
Beside some USB ports its offers ...
- 17k
-1
votes
1
answer
255
views
Is the network address of the DHCP offer, the IP of the interface that requests it?
Suppose the DHCP offer is 118.112.200.14 / 24, which is acknowledged, what is the IP that the interface chooses as its own. I would think it is 118.112.200.0, the network address after applying the ...
- 106k
0
votes
2
answers
2k
views
What is the best practice for assigning static IP addresses? [closed]
In my scenario, I would be assigning IP addresses to security cameras.
I am wondering if I should assign a static IP address from the device itself, or have a static entry on my DHCP server with their ...
- 338
1
vote
1
answer
6k
views
Can't connect with IP outside the DHCP range
My modem/router (it acts as both) has an IP of 192.168.0.1. The subnet mask is 255.255.255.0. The range of IP addresses used for DHCP is 192.168.0.100 to 192.168.0.200. To be clear, if I connect with ...
CommunityBot
- 1
0
votes
2
answers
3k
views
How does ISP know when to change the dynamic IP?
As I understand, ISP uses DHCP protocol to give out IPs from some pool. Every time they give the IP via DHCP it has a lease time. At the end of a lease time, a router can receive the same IP - but it ...
- 10.9k
0
votes
1
answer
475
views
Zyxel NAS326 not getting IP after powerloss
I bought a Zyxel NAS 326 and configured my router to a static IP. (192.168.0.110)
After power loss, I can't connect to the NAS (the IP is not responding). Every time I need to disconnect physically ...
2
votes
1
answer
2k
views
Prevent networkmanager to disable an interface if dhcp timeout when mixed dhcp and fixe ip configuration
I need to find a way for a computer to have both a fixed ip address AND have be a dhcp client on the same interface. So far it works great, I am using Debian 11 and NetworkManager.
The problem, is ...
- 301
0
votes
1
answer
14k
views
Static IP address of 255.255.255.255
I live in a house with a couple of housemates and I manage our internet connection. When looking in the admin panel of the router I saw that one device has set its IP mode to static and the console ...
CommunityBot
- 1
1
vote
3
answers
3k
views
network issue after using macchanger. no internet, no ipv4
I used macchanger with these commands:
sudo ifconfig eth0 down
sudo macchanger -r eth0
sudo ifconfig eth0 up
I am using it with virtualbox on a local network, I've never had issue with that before, ...
CommunityBot
- 1
-1
votes
1
answer
33
views
DHCP Configuration options
I want to use Windows Server 2019 as my DHCP server for my company network, the question that I have is do I have to assign static IP addresses to both the Cisco switch and the router provided by my ...
- 73.6k
1
vote
0
answers
195
views
Connecting the old router to the main router
I have Calix 854G-2 as my main router (with IP: 192.168.1.1), and Netis WF2419, the old router that I want to connect with main router via wireless (not able to connect them with cable). In the DHCP ...
- 4,872
2
votes
3
answers
7k
views
Why the IP address of the router is used as the address of the dns server?
These are the steps for converting a router to dhcp:
Why used the router IP as the DNS server IP address in the last case?
Should not use the IP address of servers like Google (8.8.8.8)?
- 1,895
1
vote
1
answer
20k
views
PC is getting wrong IP address despite DHCP
From one day to the other (maybe a windows update was in between, not sure), my PC is currently always (self assigning?) getting an IP address configured like this:
Automatically configured IPv4-...
3
votes
2
answers
3k
views
Why won't my DHCP addresses "stick"?
I've been having some addressing issues that I've been unable to solve, and I'm hoping I can get some guidance about other things to research.
Service provider is Time Warner cable. A static IP is ...
CommunityBot
- 1
5
votes
6
answers
17k
views
Can I assign any static IP address to a device on my network? Or does it have to be within the DHCP servers (or routers) defined subnet?
Currently, my DHCP server is handing out IP addresses in the 192.168.0.1/24 range. What would happen if I set a static IP address on a device of, e.g., 192.168.1.10?
And just out of curiosity, what ...
- 2,479
3
votes
1
answer
2k
views
Why does DHCP Server prefer unicasting over broadcasting and at what cost?
According to this book the DHCP Offer must be broadcast, yet sniffing DHCP packets: it looks like neither OFFER nor ACK is broadcast (or am I mistaken here?). The screenshot was taken during:
ipconfig ...
CommunityBot
- 1
2
votes
1
answer
3k
views
Find unknown static IP without DHCP enabled or gateway configured
I have a device with a static network configuration (DHCP client not enabled).
I don't know the IP address or subnet mask of the device. I only know the MAC address.
The gateway is not configured (0.0....
- 106k
3
votes
2
answers
4k
views
Static IP, DHCP Reservation, or *both*?
Fairly new to networking concepts, have read the thread DHCP Reservation vs Static IP address, and still have a "dumb" question that wasn't asked there:
I have two devices I'd like to "freeze" an IP ...
1
vote
1
answer
3k
views
netsh interface ipv4 show config doesn't match Windows 10 IP assignment in Settings?
I have set a static IP address using the netsh command interface.
The IP address is indeed statically set. This is verified by being able to communicate with a device expecting the static IP address. ...
- 369
2
votes
1
answer
50
views
Networking subnetting
I have a quick question I'm trying to set up my router DHCP server to have as many leases as possible so I'm trying to change its settings.
At the moment it's set like this:
Lan IP address 10.10.0.1
...
- 10.9k
0
votes
0
answers
141
views
Assigning a static IP to device to run TCP Server for public IP's
I'm trying to make my C++ TCP Server, which I'm running at my house, accessible from the Internet. Server needs to be accessible from public IPs rather than just local IPs (eg. 192.168.20.*).
I've ...
- 326
1
vote
0
answers
359
views
Linux IP aliasing with single DHCP and single STATIC IP address
I'm working on an embedded system with a single physical ethernet device. Using aliasing, I'd like the device configured such that one static IP address (call it s.s.s.s) is ALWAYS available. The ...
0
votes
0
answers
45
views
Windows Local Static IP Address Changes While Computer is Running
I have my Windows 10 local server set to have a static local IP address of 10.0.1.19 through my wireless router based on the mac address of the computer's wireless adapter. For the past several months,...
- 1,630
1
vote
5
answers
27k
views
I should have a dynamic IP, but it won't change
I have run ipconfig /all, which tells me DHCP is enabled, meaning I should have a dynamic IP address. However, no matter how many times I restart the modem, I end up with the same IP address. What am ...
- 11
2
votes
1
answer
299
views
Laptop accessible on the same IP via wireless and wired connection?
I have laptop which I sometimes connect to my LAN via wireless or wired connection (addresses are assigned via DHCP from the same subnet). I wonder how to setup common IP address on Ubuntu 20.04 to be ...
- 31
0
votes
1
answer
229
views
Router Disconnecting randomly ! Bad Password?
I have been facing this irritating issue lately, and have exhaustively searched for simmilar issues online but didn't got it solved yet.
I am using a D-link dual band router.These are the present ...
- 63.9k
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 ...
- 51
0
votes
2
answers
2k
views
Set multiple static IP addresses if DHCP fails
On Windows10, I would like to be able to set multiple static IP addresses (eg. 192.168.0.250, 192.168.10.250, 10.0.7.250) on the computer ethernet interface card if no DHCP server is found.
I know ...
- 113
2
votes
3
answers
1k
views
how to connect to different WI-FI with static and dynamic IP addresses?
How to connect to different WI-FI with static and dynamic IP addresses?
I have any user with loptop that connect to Wi-Fi inside Co and I set static IP for them
But when users go to their home and ...
- 465k
1
vote
3
answers
3k
views
How does my ISP send my IP address to my DHCP server (router)?
It is well know that usually in small networks the IP of a host is allocated by the router, which acts as a DHCP server. Also, since my router acts as a NAT, it is sufficient to give my subnet a ...
- 465k
0
votes
1
answer
3k
views
Clients get IP from wrong subnet
We have a Windows 2008 R2 Server with a DHCP server that manages a public IP net and a internal IP net. We use the latter for machine computers that are not supposed to show in the network and have ...
- 323
0
votes
1
answer
587
views
If I have 2 IPs assigned to an interface, how do I release just an specific IP?
I was doing some dhcp tasks for homework, and in one exercise I needed to release the IP on one client, to then in the server with tcpdump capture the packages describing the whole DHCP communication.
...
- 465k
0
votes
0
answers
141
views
How to set up isc-dhcp-server to set all router NICs to the same ip and give out static and dynamic ips based on the interface?
I am assembling a set of server/router devices to be used as a provider of some offline services for the local network.I don't need WAN, each server is isolated and for each server I have a set of ...
2
votes
4
answers
57k
views
Getting strange IP Address from router
I've had a router set up for quite some time and it has been working perfectly. My wife called me to tell me the wireless internet wasn't working and when I came home I saw that my phone was connected ...
- 1
0
votes
2
answers
668
views
Very weird DHCP IP range, never seen it before
I'm trying to figure out what this DHCP IP range means, it's in a format which I've never seen before.
Am I right in thinking that the range is in the middle? If so, then what the heck is the number ...
- 8,255
0
votes
1
answer
5k
views
Router Access Point not assigning IP addresses
Hopefully a quick question here about problems I'm having whilst setting up a router being ghetto rigged into a access point at my mates house. The main router is connected via ethernet cable to the ...
- 11
2
votes
1
answer
110
views
On boot, how can I switch to a static IP based on a gateway IP provided by DHCP?
I have a "headless" *NIX host -- let's call it 'foo' -- that is to be accessible via SSH and VNC-tunneled-over-SSH on an arbitrary 192.168.x.y/24 private LAN. Sometimes, I want to physically move 'foo'...
- 27.6k
0
votes
1
answer
878
views
Can DHCP and DNS both use .local on the same LAN?
My local LAN machines are assigned IP addresses from a Fortigate 60D DHCP server.
The DHCP uses .local as its domain name.
I now started a DNS server, also running off the Fortigate 60D.
I'm ...
- 525