Dynamic Host Configuration Protocol; allows computers on the same network to automatically obtain unique IP addresses and other network configuration parameters.

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38 views

Ethical way to get past a proxy server?

I am working with lwIP on an embedded device that wants to connect via DHCP to a flexible LAN. Sometimes the device will want to connect to a network with a proxy server. How to I make the DORA ...
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22 views

DHCP: Temporarily Reserve An IP to A specific Mac or machine for a specifc time

I m using OPENWRT DNSMASQ/ every machine should have a Dynamic IP.(it is OK) after that he gets a captive portal page to enter credentials. ( it is done too) Question is If credential is ...
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13 views

Extend MI424WR Rev I wifi range with Netgear R6200v2

I'm a fios customer and I currently have 2 of MI424WR Rev I routers and a netgear r6200v2 router. I'm currently using one of the MI424WR Rev I to connect to Optical Network Terminal (ONT) and it gets ...
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1answer
37 views

Wifi stops working after a while unless I renew DHCP (MB Pro Retina, Late 2013)

It started a while back. I think it happened when I updated to Yosemite, it happened when I updated to El Capitan. Wifi works fine for less than half an hour, then it stops working. It doesn't get ...
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17 views

Upgrading from isc-dhcpd-4.1.1-P1 to isc-dhcpd-4.3.3-P1

I am looking to update my DHCP servers with failover associations configured, running isc-dhcpd-4.1.1-P1 to isc-dhcpd-4.3.3.3-P1. I found documentation on ISC's site when upgrading from 3.X to 4.X ...
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1answer
29 views

Expanding dhcp range on DC

I work for a relatively small company and we are starting to run out of ip addresses for our DHCP server. We currently have a scope of 192.168.10.0/24. This was all set up by an IT company 3 years ...
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1answer
86 views

Motorola router breaks on auto-upgrade, Comcast denies responsibility, how to fix?

I have a Motorola SBG6580 router. A few days ago, I noticed my wireless connection stopped working and the internal IP address I had for one of my devices stopped working, even though I had ...
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1answer
64 views

How can I bridge my router to my wired LAN over WiFi?

I have a cable modem connected to a WiFi router. I have the router configured to serve DHCP. Due to the layout of my house, I cannot physically connect my home wired LAN to the router. I was hoping ...
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17 views

Watchguard firewall with DHCP

I have a watchguard with the ip address of 192.168.1.254/24 (DHCP disabled) and all the user will get IP from Window 2008 DHCP Server [192.168.1.2 to 192.168.1.250] /24. Now I need to increase network ...
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1answer
22 views

dhclient times out (wired only)

(This is also posted on fedoraforum.org, but it may be interesting to people who use other distros.) Hey all, I've been struggling with trying to connect my Dell Inspiron 17 7731 running Fedora 23 ...
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93 views

How do i make systemd-networkd ignore DHCP pushed default route?

I want systemd-networkd ignore the default route/s pushed by DHCP on one interface. My work setup has 3 network interfaces. I have one .network file for each interface: eth0) internet [Match] ...
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28 views

dhcp server or routing rules on a lan with internet server

I have two machines : Imac with Mac OS 10.9.5 & a Debian 8 server headless both have one ethernet interface and one firewire. The DHCP is still on the router and has statics ip address, the two ...
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1answer
56 views

How does a NAT router obtain its IP address?

I have a question about DHCP and NAT. I know NAT translates local IP addresses and ports into a single IP address and specific ports that can be used to communicate with the Internet. I also know ...
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2answers
33 views

How to see DHCP boot setup in wireshark?

My client tries to boot wrong file with DHCP and I'd like to debug it. My previous configuration was to boot with lpxelinux.0 file but now I changed it to pxelinux.0. But client is still looking for ...
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2answers
22 views

Increasing network range for new VOIP users

Our office using 192.168.1.0 /24 for DHCP 120 users and reserved 20 IP for servers and 10 IP for network printers. Now management decided to upgrade to VOIP phones for all users so I need to make ...
2
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1answer
48 views

Get IP from DHCP server from other machine in Internal Network

I have two virtual machines: Debian (Router) with one Bridged Adapter and three Internal Network adapters Ubuntu with one Internal Network adapter I installed on Debian DHCP server, I'd like ...
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39 views

Wireless Network Connection not getting IP address assigned by DHCP

I have an issue with my Windows 7 laptop such that, whenever I go to change IPv4 settings through respective "Network Connection property" dialogue boxes for each network interface, I always get this ...
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1answer
47 views

Does the DHCP server allocates static IPs?

I have a small DHCP server with a 50 IP scope. When I try to get an IP to my device using Ethernet I get a static IP. How can I solve this?
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10 views

Sharing internet connection over LAN (Windows 8)

I have: PC (Windows 8) connected to the internet via WLAN. POS payment terminal connected to the PC via LAN (UTP). I would like to share internet connection to the POS payment terminal. The PC ...
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0answers
54 views

Pass the ISP DNS to your DHCP clients on OpenWRT

Basically I need my DCHP clients to have their DNS pointing to the ISP ones rather than pointing to the OpenWRT/Router's IP. On (latest) DD-WRT, you can check the option to disable DNSMasq local DNS, ...
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1answer
37 views

AP client mode DHCP

i got a Netgear WN604 which i want to use in client mode to provide internet connection to multiple wired pcs and powerline extenders but i got troubles with DHCP ip assignment. Let me explain: The ...
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46 views

How do I have one OpenWRT router use the DHCP server of another OpenWRT router?

I want one router to be able to access the devices connected to the other router. However one router is connected to the internet modem by ethernet, and the other router is connected to it by wireless ...
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1answer
80 views

ip conflict on user pc and bad address shown on DHCP server after installing Wireless router

Our office has around 250 users and DHCP server (192.168.1.1 /24) and primary DNS server(192.168.1.2 /24) installed at office. I just configured linksys Wireless router(192.168.2.1 /24) for mobile ...
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2answers
81 views

dhclient unicast DHCPREQUEST excessive logs

I am using centos 7 with dhclient 4.2.5: $ uname -a Linux hostname 3.10.0-229.el7.x86_64 #1 SMP Fri Mar 6 11:36:42 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux $ dhclient -V Internet Systems Consortium ...
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32 views

Can't get Pi/Debian to renew DHCP on boot

I recently tried getting my Raspberri Pi/Debian going with WiFi. That was a bust and seemed shaky, so I want to go back to regular wired. But not I cannot get a eth0 connection going for some reason. ...
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34 views

Resetting Mikrotik RouterBoard 750GL

I've messed up some settings and now trying to reset this router, but the problem is, i can't. Or at least it seems i can't. I've tried to use reset button (turning it off, holding reset button, ...
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1answer
552 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 ...
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2answers
42 views

Wireless static IP configuration

I'm using Debian and I have trouble assigning a static IP to my computer to my local wireless network. I've setup my configuration files in my computer correctly but that does not seem to work. ...
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2answers
136 views

Using dhcp and static ip on same nic on linux with systemd-networkd

I have a portabel device that sometimes needs connection to internet(to update) but will mostly be used directly connected to a laptop via ethernet cable. I want my users to have the plug and play ...
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61 views

D-Link DSL2740u router shortfalls

I have a D-Link router (DSL-2740U) Hardware version: V1 Firmware Version: ME_1.02 I'm really struggling to get my home network set up the way that I want. The IP range is 192.1668.0/23 with my ...
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28 views

How to remotely set up IP cameras?

I'm trying to set up a CCTV system at my parents' house. Most of the networking is done already (I think), but I still need to set up most of the ~30 cameras. This is the network topology: internet ...
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38 views

Win7: PC with static IP address still requesting DHCP address

I've some PCs in my LAN, mostly Win7, to which I've configured a static IP address. Neverthless, on my DHCP server (pfSense) I see those computers with a freshly created DHCP lease! And even if I ...
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136 views

Wireless lease always expiring. Asus ADSL N10E modem

So heres the problem. My wireless modem doesn't connect properly with my Mac. I have some 6 devices that connect wirelessly to the same modem and the strange thing is, all Windows laptops work ...
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1answer
22 views

Static network want to add guest dhcp router

My work would like me to add a guest wireless for our customers. The problem I have is the system they have set up is all static ip's. How can I add a wireless router to the network so guests can ...
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35 views

Access Router without DHCP in network

I have a router with enabled DHCP server. I also have multiple switches and Wlan access points, which are cheap TP-Link Wlan routers without a DHCP server connected to the network with a LAN port. ...
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1answer
27 views

AirRouter wired connections working, AP is not

I recently added a Ubiquiti AirRouter to my network. (Let's call this AR) It is wired to my TP-Link router (Let's call this TP) which is wired to my modem. TP is my DHCP server. Wired clients to AR ...
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1answer
35 views

network ping issues, computer not pinging anything in network and trying to ping itself

When trying to ping anything in the local network the computer tries to ping itself and says destination host unavailable C:\Users\3aaa>ping 192.168.1.1 Pinging 192.168.1.1 with 32 bytes of data: ...
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65 views

ISC DHCP Spamming /var/log/messages

I recently setup a Linux box to run a DHCP server. One of the prerequisites was to get all of its log messages onto a specific file outside of the /var/log folder. For that purpose, I inserted the ...
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1answer
45 views

Unusual DHCP behavior on Windows 7

Our work network router does DHCP in the 192.168.10.# range with gateway=192.168.10.1, behind a centurylink/qwest modem at 192.168.0.1. Addresses are allocated starting with 100, so 192.168.10.100, ...
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0answers
54 views

wlan0 interface fails to fetch IP with udhcpc

I am using USB Wireless Adaptor of Realtek in Android Lollipop with RTL8192DU driver. I am able to scan the wireless network using iwlist wlan0 scan command . And I tried to connect to an open network ...
2
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1answer
46 views

Connecting two subnets with router

I'm trying to share a couple printers on two subnets and I keep running into issues. I'm trying to figure out the best way to achieve this while maintaing a public and private subnet. Please refer to ...
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0answers
28 views

How to get clients' names into the caching DNS-server?

Scenario: small home/workshop network (behind NAT), one Linux server running Samba 3.6.6 + DHCP-server + pdns-client (caching dns), some 2-3 workstations (Linux + Windows) and some 2-5 units (Android ...
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0answers
34 views

DHCP Server and WINS Server Sharing Same IP

I have been trying for a couple of weeks now on an Ubuntu system to try and run the machine as both a WINS server and a DHCP server - is there anything that would stop this from working? I just don't ...
0
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1answer
23 views

LAN filetransfer over switch - router (dhcp, dns) offline

Scenario: I am copying e.g. 1TB files with "rsync" from one machine to another (both get's dynmaic IPs). Between this two computers there are three switches. On one switch there is a router connected ...
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1answer
45 views

Openwrt: How to determine loss of lease?

I am connected to ISP using "IPoE" authentification. It works this way. When a new network device is connected, it gets a local IP address (100.x.x.x) with 10 min lease, and there web authorization ...
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1answer
21 views

Will “smart” network switches send data direct or via its DCHP server?

Bear with me on this one. I have two Airport Extremes at home linked via a long gigabit ethernet cable. I wanted to improve the control over the network by connecting all my devices via smart gigabit ...
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48 views

Network configuration to enable two gateways (ISPs)

I'll try to explain this clearly, but it's complex. My ISP (ISP1), who shall remain nameless, has reliability issues. I have a second one (ISP2), as a backup and for heavy traffic. ISP1 is Gateway 1 ...
0
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1answer
41 views

How can i configure my network so i can access a linux box behind 2 routers (4G and wifi)

I have a 4G router (DLINK DWR-921), its connected to the internet and its local IP is 192.168.0.1 I also have a WiFi router (ASUS RT-AC87U). Connected to the WiFi router i have a raspberry pi box ...
1
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1answer
135 views

D-link DIR600 DHCP clients list

I have a DIR-600 Wi-fi router and would like to know, where can I find DHCP clients list. I found only NAPT Active Sessions menu entry, which contains private IP addresses and TCP / UDP sessions. It ...
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1answer
30 views

Disable DHCP for one interface only

On my PC I have one Ethernet port that I use for network testing purposes (testing Openflow switches). For that I want that port to only send the packets that I tell it to (using packet generator ...