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Okay so at home my ethernet works fine. And it used to work at my girlfriends house for a long time. Until one morning when I woke up and went to check my pc I noticed I had no Internet. Its been 1 week now and its still not working. When I troubleshoot (windows 11) it says. Can't reach the DHCP server. Things I've tried. Switching ethernet cable Turning on and off router and modem Restarting pc. Resetting firewalls. Doing ipconfig commands in cmd such as registerdns. Renew. Release. Flushdns (everything I could find on YouTube basically.) Now I have no idea what to try next.
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My Ethernet was working fine, however the next day and currently it’s still not working I’ve tried many videos online trying to fix my wifi, but it’s telling me it can’t connect to the DHCP server. I’ve even reset my whole pc and still had no luck please has anyone had this issue recently with windows 11 and managed to fix it and if so could you please pass on how to do so thank you.
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Up until several weeks ago, I had no internet issues. I frequently lose internet access to all of my devices, now; wired and wireless. My browsers and Windows network adapter diagnosis say that the DHCP server can't be reached. I use an Arris SB8200 modem and a TP-Link Archer C7 v4.0 router. My desktop is hardwired to the router. I have tried the following: Rebooting the router (no change) Connecting the desktop directly to the modem (no change) Using a different router (no change) Using a different modem (no change) I used a new modem for a week and returned it after the first disconnect happened. Calling the ISP (no problem identified) Having an ISP tech visit (no problem identified) He checked the coax cables and grounding. Of course, the internet was fine while he was here. Rebooting the modem (this usually works, but the problem returns in anywhere from a week to 5 minutes) I'm going nuts. What should my next step be? What could be the root cause?
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Hi, I created new sub-net for just phones, then created separate wifi, but I don't have internet. Not very good at networking but here is what I have: I already have DHCP server that is running on 192.168.1.0/254, when I created new network I created with different range 192.168.2.0/254 and selected DHCP Mode = DHCP Server. My gateway is on 192.168.1.253, from what I understand I need to somehow to connect the new network with the old gateway, not sure how to do it, please help Thanks Roly
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Since Wednesday afternoon when I got home the internet connection on my PC drops out. The wifi connection itself is fine and it says it's connected but there's no internet. I've tried releasing and renewing my IP addresses and DHCP, turned off wifi 6, tried turning off IPv6 but that just stopped it working completely as well as setting a manual IP address. Running windows troubleshooting sometimes fixes it after it resets the adaptor but it comes back again after a few minutes or wont work and says "Wifi doesn't have a valid IP configuration". I've also reset my PC, unplugged the wifi card and plugged it back in but no luck and I'm getting to my wit's end on this! If anyone would have some tips or be able to point me in the right direction it would be much appreciated . My PC has as Asus AX3000 pcie wifi 6 & Bluetooth 5 card which is connected to a TP-Link Deco A20. I know it's not the wifi router as every other device in my home works perfectly on it and my PC has been working fine for months on this network with no changes or updates when the issue happened. Running speed tests they're usually at my standard speed of 120mbps down and 40 up but then it randomly drops out. I'm 90% sure it's something to do with IP. I was running nicehash when the network issue happened but resetting my computer should have fixed anything it would have changed right? Thanks so much if you can help at all. -
Hello guys! It took me three days to troubleshoot my network, but no luck. I hope that somebody will help me. I turned my old laptop into an Ubuntu Server with AdGuard Home running in it. Ubuntu Server - 192.168.254.102 I changed my Primary and Secondary Server on my router. DHCP Primary DNS - 192.168.254.102 (Ubuntu server's static IP address) DHCP Secondary DNS - 1.1.1.1 (Cloudflare DNS as a fallback) I already set a static IP address on all of the devices. However, I have an Orange Pi One that is connected via Ethernet cable. I was trying to ping the devices that is connected over WAN from my Orange Pi One, which is connected over LAN. The Orange Pi One can only ping the router, but not the devices connected on the same network. I already installed openssh-server and ufw on my Orange Pi One. It listens to 22/tcp and 22/udp. My Orange Pi One run Armbian Debian 10 Buster xfce desktop. Orange Pi One's IP address - 192.168.254.102 Router's IP address - 192.168.254.254 I did not change my LAN interface on my router, but I updated the DNS server of my Ethernet on my Orange Pi One to 192.168.254.102, which is my Ubuntu Server's IP address. LAN interface - 192.168.254.254 Subnet Mask - 255.255.255.0
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For the uninitiated, what is PXE/iPXE Network Boot? PXE/iPXE or Preboot eXecution Environment is a feature included with many makes and model of network adapter used in the boot process of a host from a network resource. Unlike traditional methods of booting a computer where-in you boot from a HDD/SSD, CD, or USB device PXE/iPXE enables your computer to reach out to a server on the network hosting the appropriate services to boot from. This can be a server hosting services such as TFTP, iSCSI, NFS, or even FCoE. NOTE: At this time this tutorial only supports Legacy Boot. UEFI Boot has not successfully been tested and therefore has been excluded for the time being. Index 1. Hardware Requirements 2. Preparing Installation Media 3. Prepping the Server Operating System 4. Installing & Modifying the Client Operating System So what should happen now if you have PXE/iPXE set as your primary boot device is: PXE/iPXE queries the FreeBSD DHCP service for it's assigned IP address meanwhile collecting the IP & Filename for TFTP. PXE/iPXE queries the FreeBSD TFTP service for the file. Chainloads (downloads) it, and boots it. The now updated iPXE image runs the special embedded script we wrote and: Queries FreeBSD DHCP for it's assigned IP again. Sets the initiator-iqn. Makes a sanboot request to the initiator-iqn. This starts loading GRUB (the bootloader). GRUB queries the FreeBSD iSCSI service based on how we edited GRUB_CMDLINE_LINUX_DEFAULT. As the OS starts to load it starts the iscsi module and queries the FreeBSD iSCSI service based on how we edited /etc/iscsi/initiatorname.iscsi. And finally after this process finishes the system wraps up what other data it needs to load into memory from disk. We have a successful SAN booted PC! There is no GUI but one can be installed. Comment below if you're interested in that. Otherwise enjoy!
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So currently I have it set up to send certain clients over a VPN and others not. Basically the dhcp range is 192.168.2.11 - 192.168.2.254 which are all sent over a VPN, 192.168.2.2-192.168.2.10 are not sent over the VPN. This has worked fine because all of my devices can connect directly and be sent over the VPN while everyone else uses our old router (which has it's own network) and is seen by pfSense as one client. (192.168.2.2). The problem is I'm planning on setting it to bridge mode (because it's a group of mesh nodes that provide better wifi coverage but keeps randomly not connecting to the internet requiring it to be rebooted (idk why it does this, no other devices on the pfSense router have any issues)) and have pfSense handle all the routing. Ideally I want to be given an option through something like captive portal for if I want this device to connect over a VPN or not when joining the network & depending on the response chose the dhcp range accordingly (for example I could make 192.168.2.11 - 192.168.2.100 no VPN and 192.168.2.101 - 192.168.2.200 with the VPN) if anyone has any input on how this could be done that would be awesome. I'm trying to avoid just having to manually specify and IP from all of my devices that I want to connect over a VPN. -
Model: TP-Link Archer C24 Hardware Version: V1 (US) Firmware Version: 1.4.3 Build 201022 Rel.55840n(5553) 51 INFO 0days, 00:01:55, [dhcps]Send OFFER with ip 192.168.0.103. 52 WARNING 0days, 00:01:55, [dhcps]Lease host name not found. 53 INFO 0days, 00:01:55, [dhcps]Send ACK to 192.168.0.103. 54 WARNING 0days, 00:34:46, [dhcps]Lease host name not found. 55 INFO 0days, 00:34:46, [dhcps]Send OFFER with ip 192.168.0.103. 56 WARNING 0days, 00:34:47, [dhcps]Lease host name not found. 57 INFO 0days, 00:34:47, [dhcps]Send ACK to 192.168.0.103. 58 WARNING 0days, 01:00:15, [dhcps]Lease host name not found. 59 INFO 0days, 01:25:18, [dhcps]Send OFFER with ip 192.168.0.100. 60 INFO 0days, 01:25:19, [dhcps]Send ACK to 192.168.0.100. 61 WARNING 0days, 01:34:48, [dhcps]Lease host name not found. 62 INFO 0days, 01:58:26, [dhcps]Send OFFER with ip 192.168.0.100. 63 INFO 0days, 01:58:27, [dhcps]Send ACK to 192.168.0.100. 64 WARNING 0days, 02:00:15, [dhcps]Lease host name not found. 65 WARNING 0days, 02:34:49, [dhcps]Lease host name not found. 66 WARNING 0days, 03:00:17, [dhcps]Lease host name not found. 67 WARNING 0days, 03:34:49, [dhcps]Lease host name not found. 68 INFO 0days, 03:55:20, [dhcps]Send OFFER with ip 192.168.0.100. 69 INFO 0days, 03:55:20, [dhcps]Send ACK to 192.168.0.100. 70 WARNING 0days, 04:00:17, [dhcps]Lease host name not found. 71 WARNING 0days, 04:34:50, [dhcps]Lease host name not found. 72 WARNING 0days, 05:00:18, [dhcps]Lease host name not found. [Full System Logs Attached below] My System Log is flooded with this message : [dhcps]Lease host name not found. It's happening with all the devices connected to the router. I've also noticed when it happens with an IP, the device with that IP looses internet connection for a short period of time like 30 seconds or sometimes even looses the WiFi signal. My DHCP setting is pretty basic without any modification to the defaults [image attached below] Most of the time there's 5 to 6 devices connected. Sometimes there's 1 to 2. I have a computer which is connected via Ethernet. I'm not sure if the computer is effected by this. I've tried factory resetting the router and configuring it from scratch. But to no avail, The problem returned after some time later. I've also tried mailing TP LINK and they are yet to respond. Posted it on their forum and no replies so far. My educated guess is the problem lies within the firmware or might be a bug. The problem is really really problematic when you need a stable connection. Please help me how to solve it if the problem is from my end. Thanks in advance syslog.txt syslog 2nd.txt
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To start please forgive me if I use any terms incorrectly. I have a google nest Wi-Fi hubs set up around my house but for some reason when ever i tried to communicate with any device that's on a Lan connection, it doesn't detect the device. IM currently got a printer set up using printing sharing on the router by all my wifi devices can't detected it. I've tested that i use the share up right and it works for lan devices but anything connected to the nest doesn't. I can confirm I address assigned by the router and nest are different but I don't know how to set so only the router can assign the addresses. Does anyone know how I can fix this?
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Quick question are there any home routers that enable you to set different DHCP pools or preferably allow private VLANS. I am trying to get a router that would allow me to have a guest network for visitors that move in their own isolated VLAN or be part of their own network with a different DHCP pool so they can't connect to the smart features in my home but can still have internet. Any suggestions welcome.
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After the death of my old sky hub, I now have a new Sky (UK) ER115 hub and want to ensure I have the two configured to work best together. With my previous hub, I had the Netgear set up purely as an access point but whilst setting up everything back I was wondering whether this was optimal and taking advantage of the better capabilities of the Netgear. I also have a cheap 8 port unmanaged switch as well. If my understanding is correct, and I am a little new to this, by currently allowing the Sky hub to handle DHCP, this means that the Sky hub is handling the routing and the allocation of internal IP addresses? Would I be better off removing the DHCP role from the Sky hub and turning the Netgear back to full router mode, simply using the Sky hub for the provision of internet access? Also, on the new hub, they have inexplicably removed two of the ethernet ports leaving just two. Obviously one goes to the Netgear but should I attach my unmanaged switch to the Netgear or the Sky hub ow will it not make any difference? Thank you in advance for any advice anyone can offer. -
Hello everyone, Recently I encountered an issue with my laptop trying to access my LAN devices, servers and switches. When I go to the IP of my NAS '10.0.0.20' I get hit with firewall blocked this type message in chrome. I allowed all of the IPs I am going to be using in windows defender firewall and bitdefender but I still get the same issue. Also I have tried my lan desktop and my brothers wifi enabled laptop and they do not have issues accessing the servers so. I have also tried pinging a device on the router and it comes back as "General Failure" (I checked my DNS server because I thought it was that and I flushed it in cmd and changed it to 1.1.1.1 to make sure that nothing setup with my DNS servers and VLANS were messing with it because I have subnet blocking enabled for the one wifi network)
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What I'll be explaining from beginning to end is the setup and network installation of a server you can host (be that bare-metal or inside a virtual machine) that enables you to install various distributions of Linux onto clients from a network server instead of from USB, CD, or other local media. This is a rather advanced topic I'll be covering. For that reason it is expected that you already have (at the minimum) a fundamental understanding of certain network concepts (IP addresses, subnets, default gateways, routers, protocols like DHCP, HTTP, FTP, SSH), what Linux is, and how to install it. Regardless of that being said, if you need additional help with networking, or how to install Linux feel free to leave a comment and someone or myself will help you wherever you're stuck. For the purposes of this installation I'll be using Ubuntu Server 20.04 inside a VM on a server on my network. Index 1. Network Setup 2. TFTP & HTTP Setup 3. iPXE Setup 4. Main.ipxe Setup
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I was setting up a wireguard server to access my servers remotely, and when I started to work on local hostname resolution, only some of the ones that I had configured functioned at all. I set the wireguard DNS to my home router to simplify the process, and came to the conclusion that that portion of the setup was functional, as I could still use the internet and a few of my hostname translations worked, even through the VPN. In all of my testing, this issue persists without the VPN, leading me to believe that the VPN wasn't the problem, it was something else on the network. At this point I hopped off of the VPN, pulled up my router's "Devices" page to check every device on my network with NSLOOKUP and discovered that only half or so of them were recognized, the other half spat out the error "[home router] can't find [ip]: Non-existent domain. The ones that were recognized were the same ones that successfully resolved through the VPN. I found this to be weird, as right after each test I was still able to ping every device successfully. I initially thought this may be a DHCP error, but some of the hostnames that worked were outside of my DHCP reservation, and some of the ones that didn't work were inside of it. I did check if I had two DHCP servers just incase, but when I ran 'ipconfig /all | find /i “DHCP Server”' only my home router showed up. I ran 'ipconfig /all | find /i “DNS Server”' and once again, just my home router. I repeated this on three different computers, Linux, Mac, and Windows. As a networking beginner, I have no idea what to look for next, so any help would be greatly appreciated! [EDIT]: After some messing and some DNS Host Mapping in my router, all of my servers appear, however I am now presented with "Your Internet Access is Blocked" whenever connecting to any of them through the wireguard server. One step forward, two steps back it seems -
I've read on the internet that you do not explicitly tell the DHCP server to give out alternative DNS servers then it will hand off what the router itself is using, that will make the router cache them, resulting in marginal performance increase. But DNS Benfhmark always says: " System has only ONE (router based) nameserver configured. It appears that only one local (router gateway) DNS nameserver, with the IP address of [192.168.x.x], is currently providing all DNS name resolution services to this system. This configuration is not recommended because most consumer-grade routers provide inefficient and under-powered DNS resolution services. Unless the DNS resolvers your router is using is under your control, it may not be providing the best or complete name resolution services. Users of GRC's DNS Spoofability system have determined that consumer-grade routers can be crashed by the receipt of specific DNS reply packets from the Internet. This opens the possibility that Internet-based criminals could acquire access to your router from the Internet as well as to the private network in controls. Many consumer-grade routers fail to provide the full range of DNS lookup services. This may have been detected by the benchmark and noted below. Recommended Actions: Unless you have some specific reason not to, you should give serious thought to disabling your router's provisioning of DNS services (which it is providing for all computers on your local network). After this is done, a fresh reboot of your computers will likely reveal the multiple DNS nameservers provided by your ISP. This is a superior configuration, without an under-powered router acting as a incompetent middleman and impeding all DNS access. This is contradictory information, what do you guys think? How do you use it?
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So I was recently able to bridge my modem/router but that reset a bunch of connections so I had to make my IP static again. Every time I make my IP static in the network I lose internet access. And I can't get internet access until I give myself a dynamic Ip. pls help -Thanks
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Hi guys, so i wanted to have full Wi-fi signal through my entire apartment, so i took my old router and turned it into AP mode. So now i have the main DHCP router sending signal in one room, and the other AP router connected to it and sending the signal in the other room. But i also have a PC in this room that i want to connect via cable. So i just connected the PC to this AP router via cable. And this all worked for a while, tested the net both on PC, and Wi-fi with my phone in both rooms and it worked perfectly. But then i tried connecting my other phone to the Wi-fi, and it would just connect to wi-fi but have no internet access. Then i tried with my mothers phone, and it would either turn all phones off the internet (they are all still connected to the wi-fi), or one of them would work and the others wouldn't. The PC worked tho (LAN connection), but at times it would have issues too. I guess because of all router reseting i did while trying to figure out what is happening with the wi-fi. I've drawn the whole connection (poorly i must add ) in the pic in the attachment. I though maybe it's because this other router loses it's router functions when on AP mode, but then why does the LAN work and not wi-fi? What is it that causes the whole thing to collapse when i try connecting more phones on wi-fi?
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Hi everyone (this is my first topic on this forum) I'm into a networking setup: I have a 2U machine with: - VDSL pcie interface (that act as an actual router, with 192.168.1.1 IP and DHCP capabilities https://www.draytek.com/en/news/latest-news/2016/06/08/vdsl2-hybrid-nic-vigornic-132-series/ ) - Ethernet NIC (going to my switch, but actually it's connected to a laptop as testing) - Wifi ASUS 88ac pcie I want to make this machine (actually running WServer2016) to act as router, firewall, dhcp and everything I need to make this network up and running (I thought to use pfsense but no support to ac wifi and no support to vdsl pcie card) So if you guys have some others easy to setup OS to use feel free to suggest me, but I prefer to use WServer the point is that I don't know how to setup the Routing and Remote Access (everyone online does this differently and no one actually used a vdsl card on Windows Server) Thank you to everyone replies
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OK so I'm not sure if I'm just confused on this concept or what's going on but I have 2 servers with the following roles installed: Main Server - Windows Server 2008 R2 (08SRV) Active Directory Domain Services DHCP DNS IIS File and Storage Services Backup Server - Windows Server 2012 R2 (WS2012) Active Directory Domain Services DNS IIS File and Storage Services So my original plan was to use WS2012 as a backup server in case 08SRV went down (like if I needed to restart it) so that we could still login to the domain as well as use the internet. Everything seems to be setup correctly as I'm not showing any issues in Server Manager but I went to restart 08SRV last night after installing Windows Updates and immediately lost internet to all the computers. Do I need to have the DHCP role installed on the Backup server or am I missing something?
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Hello, i've been trying to make a as low cost as possible build that supports netflix 4k streaming. its incredibly vague what is required for netflix 4k streaming from a pc since it doesn't really tell on netflix their own site for some dubious reason. from what i've gathered it has to support: hdmi 2.0 with dhcp 2.2 support 7th gen intel processor (celeron, pentium, i3/i5/i7 xeon etc) the proper HEVC decoder (whatever that might be, someone feel free to explain) so if someone has suggestions on what cheap motherboards support this than feel free to post them bellow. its very hard to find them since very very little manufacturers post their HDMI version and i've never seen them mention the DHCP version. -
OK so I'm setting up Spiceworks for our network and I logged into our router to set up some static IP's and realized that DHCP is disabled... I have DHCP set up on our main server but I feel like this is creating a security breach since any phone that is connected to our network is connected to the domain. I would like to have the Server handle the DHCP for our computers on the network that are part of our domain and the router to handle anything else that's outside of the domain. Anyone have any input on this matter?
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Hi, Apologies if this is kind of a dumb question, but I just wanted to confirm something before doing it and potentially messing something up. So I've got a couple of Raspberry Pis that I use for various tasks around my house, and until now I've just had to look up their IP addresses before trying to access them. Now that I've got some spare time, I wanted to set up a few DHCP reservations to ensure the Pis' IPs don't change so I don't have to hunt down their IPs every time. My question is, if I wanted to give the Pis specific IP addresses (like say, the first 3 in the DHCP range, easy enough to remember) and other devices already use those IP addresses, is it as simple as disconnecting the devices from the Wi-Fi, revoking their DHCP leases, reserving those IPs for my Pis, then reconnecting those devices back to the Wi-Fi, where they will (presumably) automatically request a new IP? Appreciate the help!
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Good day. I have encountered a strange behavior in my network. My Router is the only DHCP server on my network, and there are 15 connected computers with DHCP Reservation each. One day I've decided to temporarily disconnect one computer and I removed it from the DHCP Reservation and obviously it shouldn't connect to its reserved ip which is x.x.x.160 . After 4 days, I've connected the aforementioned computer and I am expecting that the DHCP server should assign it on x.x.x.100 , but the ip address remains the same (x.x.x.160). PS: DHCP Lease is set to 12 hours. Is it strange? or Is it normal? Can you please enlighten me about it. Thank you very much.
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Not 100% sure if this falls into the Windows or Linux category since it involves both. So I have a Windows server acting as a DHCP server and DNS server for my network for both IPv4 and IPv6 clients. For the most part everything works great except for IPv6 in regards to Linux clients interacting with the Windows server. I have the options set to allow secure and non-secure updates for the DNS side of things and to always update DNS records regardless of if clients request it or not from the DHCP side of things. The problem is that Linux clients will pull IPv6 addresses just fine but the server won't update the DNS AAAA record with anything. I've tried searching around and trying a few different fixes and solutions on both the Windows and Linux side of things but nothing seems to make it work so I'm left scratching my head wondering where I might have missed something. If anyone has ideas or possible solutions please let me know
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