Home Network :: Static DHCP With DD-WRT?
May 28, 2012
For numerous reasons, I want to bind my DHCP clients to static IP addresses, but can't figure out how to do it in DD-WRT.
I've googled, but every link I click times out (for this specific search- my uplink is otherwise fine).
I know I can do it with hardcoded IPs, I'm just curious how static DHCP is done (and yes I am aware that Static is a contradiction in terms of DHCP. I want a given MAC to always get the same IP) and would like to have some info on this.
(call this reserved DHCP if you prefer... )
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Jun 23, 2011
What I'm trying to go for is to make a Static IP so that I can forward my ports in order to play certain games. I have had my ports forwarded at one time with a different ISP (in the same area), however they used cable and the company I'm with now uses DSL. The company "Hawaiian Telcom" has provided me with a Motorola 2210 modem/router. I have had trouble trying to create a static IP with this router so (sorry if this was a stupid move) I decided to buy a linksys router to try to port forward with that. When my ports were forwarded with the previous ISP I was using a linksys router then. The now aged linksys router was replaced due to it getting wet, but that's besides the point
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May 28, 2012
So I have AT&T U-verse and am teaching myself networking and am wanting to mess around in creating my home network and set up static IPs for my devices. I know how to set them up, but I guess AT&T is saying that they have to allocate the static IPs....pretty much they are saying I have to pay them so they can say ok I can use the IP addresses from xxx-xxx-x-10 to and then depnding on how many I want to have depends on how much I pay. This makes no sense to me. Why should I have to pay my ISP for static IP address, from my understanding those are things
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Oct 17, 2012
We have a NETGEAR ProSafe™ 802.11g Wireless VPN Firewall FVG318 set up at work with a static IP so we can do a Voice Over IP from our sales office.Everything works fine until I plug in a computer that is connected to our digital printer, then the PC stays on the internet for a while, then crashes the connection.Once I plug in the PC to the network, the rest of the network has issues.
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Jun 18, 2012
I am in the process of acquiring a static ip address from my isp time Warner. I only want to pay for a single static, but I have a number of machines I want to put on the internet, a web server and a e-mail-server. Using a cisco router, a Cisco Rv 120w. Can I assign the static ip address my isp gave me to the Rv 120w and then crate a vlan to assign addresses to various computers. Or is this something my ISP does. I get the impression from the tech guy at Time Warner that this is something they do.
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Jul 2, 2011
I'm connected through a simple non-configurable switch to a 172.20.0.0. 255.255.0.0 network, with a gateway of 172.20.2.2.
When i use DHCP, i am able to connect to the web.
When i change my ip address to a static address (with an available ip address and correct subnet mask and default gateway) i am unable to connect to the web.
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Mar 12, 2013
Today I installed the 1.0.2.6 Firmware on a RV180W. I only have now two problems regarding the Static DHCP support in the GUI.
1. Via the Networking > LAN (Local Network) > Static DHCP I have no buttons to Add a new static Lease.
2. Via the Networking > LAN (Local Network) > DHCP Lease Clients I can thick a Lease and click on Make Static IP. The result is an error: Operation failed.
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Mar 24, 2011
In my router I can set rule that all traffic incoming to router's extAddr:8888, is forwarded to my intAddr:8888. But I also need reverse rule that packets originating from intAddr:8888 are translated to extAddr:8888. Can I do that? What technique can I search on google to find more information, because it is not port forwarding. I would calll it reverse port forwarding or static port address translation, but I do not find anything useful in internet searching these keywords.
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Nov 7, 2012
I have 5 Static Ip pool all IPs are working fine. I have deploy a IIS Server on Windows2008 and configure the Static IP on that server. earlier it was working fine . but since last month the IP is not pinging from Out Side but internal IP Pool its working. I have checked the SERver firewall and another Setting is Ok. if i changed the Ip from the server the new IP is also not pinging.
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Feb 25, 2012
I have a router manufactured by AirTies,the model is Air 4450.This has the capability of being an Access Point in a current network, which is how I want to use it. (Introducing it into my current Sky Broadband network with a Sagem F@ST 2504N router).However, I cannot access the configuration page whatsoever.The manual states the default IP address of the router is 192.168.2.254, so I have set my laptop to a static IP of 192.168.2.100 and patched into LAN port #1 on the rear of the Airties 4450, powered on the unit and cannot access the router at all.I have held down the reset button several times to no avail.how I can configure this unit ?
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Jan 15, 2013
I've got a server that is connected to the network through one physical ethernet adapter. From my ISP, I got 4 static, public IP adresses, one of which is in use on the Host-Server itself, the remaining three each on a virtualized server. All 4 Servers are running on the same machine.Everything is running smoothly, however, I need to do some Bandwidth Management and Port Mapping, this is why I bought a ZyWall USG20, thinking it would be perfectly capable of doing what I need. is it possible, with a ZyWall USG20, to have all my four IP adresses being forwarded to the one physical machine, and apply some bandwith shaping and port mapping to it?
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Apr 12, 2011
How is it determined which DHCP hands out IP
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Aug 23, 2012
I have a Linksys e3200 which was working great until about a week ago. Now any device that connects via DHCP does not have access to the internet, though devices set up with a static IP outside the DHCP range still have full access.The devices connecting via DHCP still have full network access, just not internet access.I tried most of the obvious fixes (reboot, changing the range and lease time for the DHCP) but have at best received a temporary fix.
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Mar 4, 2012
A little background on me: I do performance testing for a large corporation, so networking is like an old hat for me - but this has me spinning because it makes no logical sense to me.Here's the layout of my home network:CableModem(passthrough) -> WRT120N -> ENH200 (Access point) -> ENH200 (Client Bridge) -> Netgear N600Both the WRT120N and the Netgear N600 are providing wireless access to clients at both locations. N600 is set not to route or DHCP, and the WAN port isn't used.Initially the WRT120N wasn't in play because the cable modem was serving DHCP, but it wouldn't successfully send DHCP to most clients on the other side of the client bridge. So I installed the WRT120N (old, I know) and it was able to serve up DHCP to any and all systems... for a while. Now DHCP doesn't appear to be working fully again on the Netgear side of the bridge. One device registers in the WRT120N, the client list shows the mac as getting assigned an ID, but the device never actually pulls the address. Static works fine. Those that already have DHCP addresses work like a charm, so I know the link is stable. pingtest.net reports near perfection.
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Mar 9, 2012
I have a question regarding setting up a wireless access point on a network. Lets say my router is going to connect to a switch. The switch puts out 192.168.4. addresses. I want the wireless router to do the same. So I turn off DHCP.Everything works fine and everyone can communicate. Here is my question. How do I ever connect back to the wireless router if I need to change the settings? If the wireless routers address is 192.168.1.1 I cannot get back to it since i am now on the 4. subnet. I have also tried changing the router's ip to an address on the subnet such as 192.168.4.100 but on two different routers this didnt work. One didnt me and said there was a conflict with the WAN IP. The other one would not let me get on the internet.
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Feb 7, 2012
I have a Blackberry Playbook and have come into a problem with it.I can't set a Static IP on it so would setting a DHCP Reservation in my Linksys E2500 router act as a static IP?
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May 7, 2011
I have a machine with Windows Server 2003 running an Exchange Server in a office with 5 workstations attached. The server is being used for a basic outlook calendar across the various workstations, nothing major. Our current ISP provides us with a Static IP address. The party that installed and configured the server set it up to run the DHCP server on the server PC itself. As in, the machine running windows server is also running a software DHCP server for the entire network. THE SETUP: As of right now we have a wall port (internet access) with a cable running to a 8 port unmanaged netgear switch that has cables hooked up to the 5 workstations as well as the server itself. Pretty simple.THE QUESTION: How do I configure the ISP static settings on the DHCP Server portion of the Server PC? We may be getting a new ISP with a dynamic address OR a new static address. WHAT I'VE TRIED: I've tried configuring the IP address on the Server PC the way I would via the NIC adapter settings but it already has a internal IP address from the DHCP Server running on that PC so changing that was no good.
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Aug 22, 2011
I'm totally new to using Windows Server 2003 (or any windows server edition) but I do have a basic understand of networking. I have a machine with Windows Server 2003 running an Exchange Server in a office with 5 workstations attached. The server is being used for a basic outlook calendar across the various workstations, nothing major. Our current ISP provides us with a Static IP address. The party that installed and configured the server set it up to run the DHCP server on the server PC itself. As in, the machine running windows server is also running a software DHCP server for the entire network. As of right now we have a wall port (internet access) with a cable running to a 8 port unmanaged netgear switch that has cables hooked up to the 5 workstations as well as the server itself. How do I configure the ISP static settings on the DHCP Server portion of the Server PC? We may be getting a new ISP with a dynamic address OR a new static address.
I've tried configuring the IP address on the Server PC the way I would via the NIC adapter settings but it already has a internal IP address from the DHCP Server running on that PC so changing that was no good. I guess what I'm basically looking for is a screen like this (I hope you're familiar with the configuration pages of Linksys Routers) url...
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Feb 5, 2011
I am having trouble connecting to the internet, but not my network, when I assign a static IP to my machine. However, when it's set to DHCP, it works just fine.
Pertinent info:
-I'm connecting to a Linksys WRT610N router via a wireless USB adaptor, Netgear WNDA3100v2;
-Service is Time Warner Roadrunner cable;
-There is no IP conflict as I've got DHCP range set from .200-.249 and this machine's static is .100;
-All the other devices in the house are on static starting with .101 up and they all work fine, both wired and wirelessly;
-Can see and connect to all devices in the LAN, including the router, but nothing outside
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Feb 22, 2012
I have my boss's (president of the company) laptop, wired LAN port, setup with a static ip so his laptop will bypass his company's web filter, and was going to let him use the wireless for home and travel. However, what if he needs to use his LAN port on a different network that doesn't support the ip's of our company's network? I need to see if there is a way, utility, or something that can be done to allow him to have a static ip assigned to that port and use DHCP (for when he is on other networks) so he can bypass the web filter.
I have a rule on the FW to allow his static ip to bypass the web filter. I have tried the alternate configuration inside XP and editing the registry to assign that nic dual ips, but I still get blocked on the filtered webpages. For now I have just emailed him the steps on how to switch it manually.
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Jan 21, 2011
My old office uses Cisco 861 as a VPN router, with the WAN side setup to receive a dynamic IP assigned by Time Warner cable. Now we switched to a new office, with TowerStream which provide 4G SLA'ed 10Mbit service with static IP, and I get a Cat 5 ethernet down from it.
So all I did, was to go my "interface FastEthernet4", and typed ip address 173.243.123.123 255.255.255.252.Changed speed to "speed 100" and "full-duplex" (as instructed by the ISP).
I also did "ip default-gateway 173.243.123.124", which is the default gate way assigned by the ISP.I also typed "ip name-server 64.17.123.123" to setup the new DNS, am I doing anything wrong? I can't even use the router to ping google, but if I connect the laptop directly to the outside line, then it works, so I know the outside line is good.
Why can't I connect to the internet? I wasted several hours already trying everything in my book to trouble shoot a supposedly very simple configuration change. Do I need to change something related to NAT when changing to Static IP? My NAT was working just fine before when under DHCP.
The below is my full config (some IPs changed to preserve anonymity):
=============================================
Building configuration...
Current configuration : 16628 bytes
!
version 12.4
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
[code].....
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Sep 30, 2011
Can the DHCP server on an ASA be configured with static bindings like IOS routers can?
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Aug 8, 2012
I have a Cisco 876 router running 12.4.(15)T5, configured as DHCP client. This works nicely.
A Cisco 886 router, running 15.1 software also works with the DHCP client. This also works but has the following strange beheaviour: In the running-config an ip route 0.0.0.0 0.0.0.0 <dhcp assigned address> appears. Also - some other static routes that are in the config using the dhcp keyword are duplicated with the dhcp-assigned address
Now - when a write mem is done, these dhcp-generated route entry's are stored in the startup-config...
This beheaviour is completely different and VERY unwanted. After a change from DHCP server the config will simply stop working, when a write mem was done at the first DHCP situation.
Should we stop using write mem commands when a DHCP client is active in IOS? Is it a bug? Is it a feature?
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Feb 2, 2013
I used to use a CentOS self-made server for intranet for my little office, but I bouth few days ago a Cisco 861 router to replace the linux box.
1. I have 2 public IP classes from my ISP. 1 class is limitted to 80mbit upload, the other to 30mbit upload. So I need some sort of DNAT to be able to know exactly which intranet computer uses big internet and which one limitted internet.
2. I need DHCP server and with static IP addresses (one computer must always have the same IP address, etc).. i have my needs for this.
3. Also I need external access to some servers inside (web, ftp, etc) [code]
So far so good, all looks simple and I can achieve this in 2 hours on a centos linux box (correct routes, ip forwarding enabled and few iptables rules for NAT/SNAT/DNAT).
But on this brand new Centos router well, i'm not even successful in pinging the outside world, nor the inside world I'm tired of reading the forums, the documentation..i want (at first) a simple scenario: vlan+dhcp, fa4 with 1 public ip address and ACCESS to the real world. I wasn't able to achieve not even that much. [code]
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Feb 25, 2013
Region : Australia
Model : TD-W8960N
Hardware Version : V4
Firmware Version : TD-W8960N_V4_130205_Beta
ISP : TPG
I have an Optus Home Zone (mobile cell tower) that requires ports open.
Port
123 UDP
500 UDP
4500 UDP
I have assigned the Home Zone a Static IP outside the DHCP range and set the above Ports on the NAT, Virtual servers to that IP address.
I have used nmap to scan the ports and it provides open/filtered status for all of them.
Here is the kicker for me, i use a DGN3500 netgear (which keeps dropping WiFi hence its replacement) and enter the ports and it works straight away. Un plug and put the Tp-Link and nothing.
I use Eset Smart Security, could that be the problem?
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May 19, 2013
I'm having troubles with this firmware in a SG300-28 switch. Actually the DHCP server, a new feature in this firmware release, doesn't work correctly. DHCP static reservations are not working: CLient ID and MAC address are not recognized correctly, and the DHCP server assigns the first free IP in the pool, rather than the reserved one.If Cisco engineers read this, plese correct the issue.
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Sep 9, 2012
My old modem from Roadrunner (Time Warner) died and the service man replaced it with a Arris TG852 modem/router. then my problems began. I would like to have the Arris modem act like a modem and not a router. The network governed by the DIR works fine but none of the clients can connect to the internet. Below are the steps I have tried.in both steps below, The DIR is connected to the Arris using the Ethernet not the Wan port.
1. I tried disabling DHCP on the Arris router and setting a static IP address for the DIR router. This worked for a bit and then quit. Some of the computers said there were duplicate IP addresses on the network. If fact the same IP address showed up in the DNS list of the Arris and the DIR routers.. even though the Arris router had DNS disabled.
2. After reading other forums. I enabled DHCP on the Arris and set it to passout IP address between 192.168.0.2 and 192.168.0.99. I then setup the DOR to pass out addresses between 192.168.0.100 and 192.168.0.200. then moved the DIR into the DMZ of the Arris. Still no access to the internet.
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Jul 8, 2011
I just bought an e4200. I was using a LinkSys WRT54GS running DD-WRT alternative firmware.
One feature that I really liked in DD-WRT was the ability to assign static IP leases from the DHCP server. I liked having all of my devices running with a predictable, known IP address on my network. I have a Home Theater PC, and various controller applications that run on iPhones, etc. - some pretty homebrewed. Configuring the firewalls, etc. was much easier with IP address based controls.
Is there a way to achieve the same within the e4200's stock firmware?
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Jul 30, 2012
I'm experimenting a strage issue with some AP1142 that prefer getting new IP from DHCP server rather than using the static ip already configured.
I've got more than a hundred of 1142 APs already conected to a 5508, all with static IP, all working fine for about a year.
As i installed 30 more AP, i enabled a dhcp scope on the controller to give IP to the new APs and when the new aps got registered i changed the configuration to static IP.
The problem comes when some of the older AP than have already static ip are gettig ip from dhcp scope.
If i look at my WCS, it reports that this APS are getting DHCP IP because they cannot reach the controller with their static ip. As this is impossible, because the static ip and the dhcp enable scope are in the same subnet in a layer 2 configuration and with the same gateway. (e.g: old AP 10.10.2.10/16; new AP(dhcp 10.10.3.10-50) 10.10.3.15/16; gw 10.10.254.1)
The problem comes when i disable the dhcp scope, all the older aps that got dchp ip from the wlc scope instead of using their staic configured ip are deregistered. If i reset every ap manually, from the swithc disabling PoE, they start to use the static ip and everything comes fine.
This is happening with about ten of fifteen APs from the 100 installed, that is the strange thing because this seem to be very random as the failing APs are installed in different building and connected to different switches.
As now i have disabled dhcp scope and all APs (old and new) have static ip everything is ok, but i will have to add some more APs shortly and every time i enable the dhcp scope on the wlc
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Feb 24, 2013
I have a Time Warner Cable business class service with no static IP, with a wireless modem which is plugged to a CAT5 distribution panel. On the jacks (2 other rooms on the house) I have a Linksys E3000 and a Linksys Valet router for signal boost and gadgets usage (TV, cameras, etc).The main router (TWC) has it's own external IP which TWC assigns to me and internally distributes via DHCP the range 192.168.0.x. With that said:
- The E3000 has a 192.168.0.6 IP -- this is fixed setup on the TWC router (ubee brand) by MAC address
- The Valet has a 192.168.0.7 IP -- this is fixed setup on the TWC router (ubee brand) by MAC address
- The main router has the 192.168.0.1 as the gateway and web-interface
Whenever I connect something to the E3000, it is distributing the 192.168.1.x range and the valet 192.168.2.x range.That works perfectly for my home based business until I decided to use more stuff on the network such as a IP printer, IP cameras, etc.
- The IP cameras are connected to the E3000 due to signal strength and I have manually assigned them the 192.168.1.15 and 192.168.1.16 IPs and ports 9001 and 9002.
- The printer is connected to the E3000 and I have manually assigned the IP 192.168.1.30.
Issue 1: Port forwarding On the main router (TWC - UBEE) I have tried to setup a port forwarding by informing the Local IP as 192.168.0.6 (E3000 IP), Internal Port 0, Public Interface IP (0.0.0.0), Ext Start Port 9001, Ext End Port 9001, Protocol - Both, Enabled Yes. On the E3000 I did the same config (screen shot attached e3000.png).This is not working properly. I can't get into the camera.
Issue 2: Printer/ The printer is only accessible if I connect to the E3000 (because it is on the 192.168.1.x network)
Issue 3: How to configure all the devices on the same subnet? If I want everyone to be on the 192.168.0.x network, how to configure properly the E3000 and the Valet? I have tried to force them into the same network but it would not work properly. It would not get an IP from the UBEE router (main).
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Jun 22, 2011
I have enabled DHCP but want to set static table IP's for my security camera DVR and one computer, the others can remain dynamic. I know in other routers I can attach a LAN IP to a mac address to keep it static but I can't see where I can do that with this router.
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May 31, 2012
i am not sure if this is something with my DHCP setup or not, but it certainly seems to be the culprit. I am running a 3560G and using it as DHCP and to do V LAN routing (Geiger protocol). I have 10 pools configured with a few static addresses per pool. Now to get down to the problem. I have a computer (and this problem seems to be a gremlin as it changes what computer is affected quite often) that will connect, get its IP, immediately disconnect, then send out a DHCP req again. The computer has a static assignment in the pool, and for the brief second that it connects, it gets the right address. If i move the computer to another v lan, all works right. If i delete the static entry it will get an address in the right v lan no problem. The command i have been using to add static entries is:
address xxx.xxx.xxx.xxx client-id 01xx.xxxx.xxxx.xx
That seems to have been working on all my static routes except for a bank of computers in vlan3. I have went as far as to delete the pool and recreate it, heck i even recreated the v lan and i am still having issues. Below are some snippets of the running config for review.
The DHCP Pool for the affected LAN:
ip dhcp pool Dev3
network 192.168.3.0 255.255.255.0
boot file bootx86wdsnbp.com
next-server 192.168.1.78
dns- server 192.168.1.8 192.168.1.78
[Code] .....
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Dec 18, 2012
I'm following a tutorial that 'dumbs down' the modem and lets me use the router for everything.
It asks me to set up a static LAN IP (10.x.x.x range) and edit the DHCP pool of the router. When I'm logged in to the routers admin, it doesn't seem I'm able to do any of this.
Earlier in the tutorial it also asked me to set up a static IP for the router, which I did I suppose.
I've added a screenshot of the admin panel, in case that's relevant.
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