Unknown DHCP Clients In D-link DIR-615?
Aug 2, 2011
When I go into the Network Settings, and the end of the page I find a list named "Number of Dynamic DHCP clients: 7". As far as I know, I should only see 4, all 4 laptops; however, I see 2 UNKNOWN entries in this list, and one name "Macondo". Each of these entries have an option (a link) saying "Revoke" and other "Reserve". I am just wonder if these entries are intruders in my home network. What should I do? I am afraid to break my internet connection. By the way, I set up every single one of my family 4 laptops at home with a WPA-PSK using a very long key.
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Jan 6, 2013
I've just discovered this thing in Windows Event log. The DHCP-Client log is full with this: the client received a NAK from the DHCP Server. Strangely, they still get the desired IP address. (Which are reserved adresses for the MAC adresses.)So I've looked at the logs in the DIR-615 (rev.D, FW: 4.13), and found this:
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Jul 27, 2012
I recently noticed my 'Number of Dynamic DHCP Clients' on Network Settings is always empty. Before, it always registered a list since there are several devices that are connected to our wireless network (laptops, mobile phones, desktops).
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Nov 19, 2011
I keep getting some additional IP addresses logging onto my home network that have an address outside what should be allowed by the router. The server is running at 192.168.2.1 and is set to only allow clients from 192.168.2.2 - 192.168.2.10 so a total of 9 clients should be allowed on.The problem is that something keeps logging in with an address of 192.168.169.2 or 3 etc. Sometimes more than one device at a time.I have assumed that it is some automated or virtual client as I'm pretty certain my network has not been breached. I have a 9 character password with a relatively random alphanumeric combination, although I haven't tried changing the password (I live in a share house with with a bunch of devices using wireless, so I haven't yet bothered). What I don't understand is how it has connected with the xx.xx.169.xx range at all. I have a Belkin 'Share' Wireless N Modem Router and at some stage there was a 'guest' network but that has since been disabled and I still am seeing the extra address. I have attached a screen shot of the DHCP client list on the router.The following is a list of devices that may be on the network at times, I'm thinking one of these may be responsible for the problem:
Windows Vista Desktop - Only LAN device
PS3
Macbook
Epson wireless printer
Android HTC Desire Mobile Phone
Laptops running various Windows versions (XP, Vista and 7)
A few thoughts I had:
- the android phone is capable of running a wireless hotspot, may have to look into it to see if if has been operating as an access point into the Belkin router, but assumed this wouldn't bring up clients connected to the phone on the home router.
- The desktop has PS3 Media server installed to stream video to the PS3 over the network (not that I have ever managed to get it to work), however this is not ever open on the desktop.
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May 2, 2013
I have the WRT400N router with the latest firmware. Recently I have noticed a device in my DHCP that I do not recognize. It is not device I own (believe me, I have racked my brain and confirmed) as it shows as an Acer pc. I cannot ping the IP address however. I have rebooted my router several times thinking maybe it's a former connected device but saved in memory but it keeps coming back. I am thinking possibly it is someone hi-jacking my Internet, but not sure. I am using WEP security but it shows a LAN connection which is strange for a wireless device. The only hard wired pc is my HP.
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Jan 23, 2012
when using Windows 7 network map, there is a "Unknown" with a question mark on the map between my wired pc and the router.
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Mar 8, 2009
I'm monkeying around with an 881-W. Clients can associate and authenticate to ssid 'test', but they cannot get a DHCP address. Clients plugged into f 0 - 3 get DHCP addresses just fine.
I've looked at a lot of different guides, ran debugs etc. When wifi clients make DHCP requests the server never gets them. So there must be some IRB thing going on.
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Jan 11, 2013
I have successfully configured my DHCP server because I can ping it from the clients PC and my clients PC automatically grabs IP from my DHCP. How my clients can have access to internet. Here is my hardware setup: 1. I connect clients PC and one DHCP server in one unmanaged switch2. I have my Bell DSL Modem but not connected yet to one of these machines. I do not know how I can configure it yet to work with my machines.The IP I assigned started at 10.10.200.10 to 10.10.200.90How do I connect the DSL and configure so that it may give everyone access to internet?
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Jun 30, 2011
I'm trying to understand my options for assigning addresses to VPN clients on an ASA 5510. Under the ASDM, I have a field for DHCP servers, radio buttons: none, dhcp link, dhcp subnet, and field: client address pools. Cisco's VPN examples demonstrate setting up a client address pool, which I did, but the VPN client isn't assigned a gateway in the process so it can't connect to anything; I really don't understand the point of this. I'd like to create a DHCP pool on the ASA for VPN clients as this seems to be the standard configuration. However, I don't know where in the ASDM to configure this and how it's applied. The only DHCP options I found involved creating a DHCP server on an interface, which I don't want to do since VPN users aren't on a physical interface, right?
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Mar 29, 2012
I have new 2504 WLC + 1041LAP. I configured the first DHCP scope on WLC and the first WLAN. Then I set WLC DHCP server in WLAN properties and tried to connect to WLAN with wireless clients.
My wireless clients are able to authenticate on WLAN, but not able to get IPs from DHCP. The only lease that DHCP shows is for 1041LAP.
If I set permanent IPs on my wireless clients, they can connect and ping WLC.
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Sep 29, 2011
When on the management interface the clients can't get dhcp but the AP's can on the same vlan. I've tried enabling and disabling dhcp proxy, and using a remote dhcp server as well as the internal server. This same config works on the 4402 we're replacing with version 5.2.193 on it.
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Jan 20, 2011
I've got a 2106 that I'm installing for a customer and having issues with it assigning DHCP to WiFI clients. What's odd is that this was working at one point at home during testing. Only difference at this point is LAN hardware at the customer location.
Simple config- single flat vlan on Cat2960G switch, ASA5505 serving up DHCP for the network. Wired clients are receiving DHCP fine.
Mgmt IP192.168.0.10/24Mgmt Gateway192.168.0.1Mgmt VLAN0Mgmt Int port1Mgmt DHCP server192.168.0.1AP Mgr Int IP192.168.0.11Virtual GW IP1.1.1.1RF group namerfgrp1SSIDxxxxClient Static IP?noCountry Code802.11a/b/g statusenabledRadio resource mgmt statusenabled I've run dhcpd debug on both the controller and the ASA and I see the DHCPD requests on the controller, but I never see them hitting the ASA.
I don't have the specific version of code it's running, but I know it's 6.0. One of my local Cisco account engineers found some Cisco CSC bugs referencing this issue. One TAC cas even referenced stripping all security off the WiFi, connecting the client and then reimplementing the security again.
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May 27, 2012
My company AP 1231G is not passing the DHCP address to the client from the DHCP server, my config listed below basicly the AP is on its own VLAN 10.1.123.1 and the DHCP server is 10.1.10.2 -- trying to use iphelper to pass DHCP to clients and the AP is on static IP 10.1.123.2--
!
! Last configuration change at 13:15:56 +0800 Fri May 25 2012 by root
! NVRAM config last updated at 13:15:56 +0800 Fri May 25 2012 by root
!
[Code].....
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Apr 10, 2012
I recently upgraded a clients WLC and they keep saying they are unable to get an IP address from the DHCP server. It's a simple, flat network and here is what the logs are showing.
*apfReceiveTask: Apr 11 13:37:25.477: %SIM-3-DHCP_SERVER_NO_REPLY: sim_interface.c:1039 Failed to get DHCP response on interface 'management'. Marking interface dirty.
*apfReceiveTask: Apr 11 13:37:17.278: %SIM-3-DHCP_SERVER_NO_REPLY: sim_interface.c:1039 Failed to get DHCP response on interface 'management'. Marking interface dirty.
*apfReceiveTask: Apr 11 13:37:05.880: %SIM-3-DHCP_SERVER_NO_REPLY: sim_interface.c:1039 Failed to get DHCP response on interface 'management'. Marking interface dirty.
*apfReceiveTask: Apr 11 13:13:47.397: %SIM-3-DHCP_SERVER_NO_REPLY: sim_interface.c:1039 Failed to get DHCP response on interface 'management'. Marking interface dirty.
[code]....
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Mar 29, 2012
I would like to share one problem with WLC 5508 . we added a new virtual interface on the WLC. One new SSID is associated with this interface.
We created a ACL for this interface to restrict the access via WIFI to certian services. It´s not correct that everything works fine because the change were not applied. [code]
The changes of the ACL are applied on the fly, but for reason we don´t know, the clients don´t get a DHCP IP-Address (after changing the ACL) until the Controller is rebooted.
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Jul 8, 2013
I have the dhcp server setup and working on our main 3560x.
The only problem is that it is not assigning the dhcp clients a default gateway.
I was not able to find it in the Cisco documentation and a google search is not useful either.
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Jan 27, 2009
I know this question was asked many times, but I'm still not able to finalize my configuration on 871w. LAN part works fine, but wireless clients do not get DHCP IP. here is the config:
Building configuration...
Current configuration : 2092 bytes
!
version 12.4
no service pad
service timestamps debug date time m sec
service timestamps log date time m sec
no service password-encryption
!
[ code ].....
I'd like to have LAN and WLAN clients in same 192.168.1.0 sub net.
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Jan 16, 2013
I have a 4402 (version 7.0.235) working with 10 units of 1121 APs connected to it. The WLC is not configured to work in LAG mode. Physical portt #1 is connected to the Main Switch (trunk). I have 3 WLAN mapped to 3 Different VLAN and Everything (security and internal, external DHCP) is working swell...Now- I have connected Physical port #2 directly to an ADSL Router (giga port), Configured Port 2 as untaggedwith the proper IP details.I have configured this interface to receive DHCP from the ADSL Router and for some reason, Clients are not getting addresses.When I assign a Static address to my laptop I get internet access and all is nice. I tried configuring The WLC internal DHCP server (instead of the ADSL router) and that didn't work. It seems like a DHCP problem but I dont understand the source of the problem of think of the solution.When turning off the proxy settings I noticed that it worked. Is there anything to do with that? The problem was that after a while the other WLANs starting causing DHCP issues as well.
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Feb 5, 2013
I have 19 locations, each with 1 or more LAP1142N AP's in FlexConnect mode, AP's are primed using CAPWAP to my 5508 WLC at the datacenter. The AP's join the WLC without issue every time. I have two WLAN's, one guest and one staff, the guest network is open and obtains DHCP from a WatchGuard XTM33 firewall at each of the remote locations. The staff side is WPA2/RADIUS and DHCP is assigned from the WLC. Each AP is assigned a static IP that is not in the DHCP scope. For example: DHCP scope on the branch firewall is 192.168.1.10-250 the AP will be assigned static IP of 192.168.1.1.. The AP's are connected to a HP procurve switch that has a untagged VLAN, the firewall is using the native vlan 1 and so is the AP.
I have been running this network for over a year and it has not had a single issue until the last two weeks. Nothing on the network has changed or has been upgraded.The issue I am seeing is that clients are no longer able to connect to the AP and do not get DHCP assigned to them. I am able to get it working, if I remove the static IP from the AP, the AP will reboot, join the controller, then begin working, users can connect and DHCP is assigned from the firewall as it should. However, If the AP then reboots, the AP will join back to the controller but no clients can connect nor do they get a DHCP address. So, I then reassign a static IP to the AP again and it reboots, connects to the controller and clients then can connect and get DHCP.i've found several posts on this topic, in fact the patch of unassigning or reassigning static IP is one that I found. I am also waiting on my SmartNet to start up and will be contacting Cisco support as well.
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Jul 11, 2012
I have a few sites using the RV042 with wireless access points and some of them have over 50 devices.In reviewing the documentation (specifically,[URL]), I came across this:Enable DHCP server: Check the box to allow the router to dynamically assign IP addresses to up to 50 connected devices. Uncheck the box if you have another DHCP server on the network or you want to configure static IP addresses for your network devices.Is this accurate? Or will the RV042 allow more than 50 devices?
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Oct 9, 2012
I have a Cisco RV220W running the latest firmware (currently 1.0.4.17), and I have noticed that after about a week of use, wireless clients can no longer acquire IP addresses via DHCP.
I have used Network Monitor on both the DHCP server, and the WiFi client, and can see that the server is receiving the requests and sending a reply, but the client never sees the response from the server. So far the only way to resolve this is to reboot the router.
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Nov 26, 2012
Is there a way on the security appliance SA520 to remove someone from the DHCP lease client manually rather than setting the DHCP lease time to expire in less time like 4 hours or 2 hours. I was able to do this on other routers by highlighting the connected device and click remove. If not any recommendations on how to handle the device that are attached via DHCP and the person is no longer here, but the lease time is not up. I have set DHCP lease time to 4 hours.
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Nov 14, 2011
So here's what I think I should do to give email access only to a segment of addresses of my inside network.
1) Create a network object for 62 machines that will represent my dhcp clients.I plan to use 192.168.0.65-192.168.0.126. So I will use address 192.168.0.64 with netmask 255.255.255.192. Then set DHCP server to service this address range.
2) Create an ACL which will Permit Any to use tcp port 110 (pop3) to get to the outside. Which leads me to question #1:
How do I permit the source "Any" to communicate with "Any Less Secure Networks" like the implicit rule that gets zapped once I create new ACL? Is "Any Less Secure Network" implied by the "Any" destination?
3) Create an ACL which will Deny my DHCP range to talk to the outside.
4) Create an ACL which will Permit Any to talk to Any Less Secure Network(essentially recreating the implicit Permit ACL that got zapped).
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Jun 4, 2013
All the SOHO routers I have used had a table which shows IP, MAC, Name, etc. In this table, I could easily put a check mark to a check box in a row that I would like to bind/reserve and IP would be reserved for that specific MAC.
In ISA570W, when I need to reserve/bind an IP to a MAC it asks me to fill out a table in which I have to manually type in the name, IP, and MAC.
Is there an easier way?Is there a way to do the reservation for multiple clients at once?If this is the only way, do I need to copy the mac address of each client somewhere and then reserve IPs for each one manually? This method looks very far from user friendly and efficient, unless there is a very logical reason that I cannot think of.
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Oct 3, 2011
I have a Cisco 870 integrated service router and 3 Cisco Aeronet 1180 Access Points.I have configured the router to act as a DHCP server. with all four /26 subnets in a seperate address pool.the first one is for the routers wireless interface and works fine.but the other 3 are for each of the wireless access points, that are used for internet access, but have to operate independently (i.e. the clients on each must not be able to access anything other than the devices associated with that access point and the internet.
The problem I are having is that the router doesnt distribute DHCP information via the access points so the clients on all the access points are not recieving any internet connection at all, but are connecting to the access points, and the LED for the access points suggest that they are connected t the router, the router accnowledges their existence but is not transmitting through the fast ethernet switch ports. but is communicating with a wired printer that is associated with the wireless vlan.
Each access point is on its own vlan, and the switchport access vlan command has been used. only the five static addresses have been excluded from the address pool. the router, the three access points and the printer adresses are static. the printer is working despite being the only device on the /24 network all other addresses are on the /26 networks. this to my knowledge shouldent work but it does, which is handy because the printer software doent support subnetting.The simulation I have ran say that only the printer shouldent work, but its the access points that are not working how they should. I have studied the configuration of the router and access points, and came up empty on why they are not recieving DHCP information.
I are not even able to telnet to them, despite having an address setup. I have not set up a routing protool on the router due to it being the only router. I have checked the interfaces fa0 to fa3 and they are line up protocol up, the wireless is line up protcol up, the vlans are line up protocol down, except the one asociated with the wireless which is line up protocol up (I believe the protocol only goes up when a device is connected to it).
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Dec 27, 2012
Is there a way to get the E4200 to NOT provide itself as a dns server to the DHCP clients? I have the unit set up to provide two dns servers to the clients, but the 4200 always provides itself as a third and it uses my cable providers dns servers. I am using a dns based filtering service to prevent certain material from being accessed within my network as the first two resolvers. So long as both or one of the provided servers is working it doesn't fall back to the unfiltered third, but I would prefer to remove it entirely.
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Nov 18, 2012
We've got 5 remote offices with cisco 881 routers, Win Clients behind them and all routers connected via vpn site-to-site to central software router.
Mostly all clients recieve ip addresses from routers in their subnets 192.168.x.024
We have Win DHCP Server in subnet 192.168.181.024
The problem is that some of clients,physically sutuated in 192.168.10.024 subnet, recieve ip addresses from Win DHCP server from 192.168.181.024 subnet.
Here's part of cisco cfg:
interface FastEthernet0
no ip address
!
interface FastEthernet1
[Code].....
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Nov 24, 2012
The router always inserts its’ own address as the primary DNS server for the all DHCP clients even though you have set the DHCP server on the router to assign manual external addresses?
Oh I have a
WRT310n v2
firmware v2.0.01 build 004
Let me elaborate a little so I am clear what I am saying. On the router setup page go to the section that is labeled “DHCP server settings” enter 3 static DNS servers. Say 2 Google and one open dns.
8.8.8.8
8.8.4.4
208.67.222.222
Apply your settings.
Release your ip on your workstation, then renew it. And look at your DNS, the routers address is still the first entry.
DNS Servers . . . . . . . . . . . : 192.168.1.1
I suspect this was probably a design decision so that they could allow a user to open their web browser and type something neat like [URL]. Which for the average user is fine and dandy. If my ISP didn’t suck and try to redirect everything to cached copies I probably wouldn’t have noticed it. But since I end up using the router for DNS and it picks up DNS from my ISP I end up getting Akamai IP addresses, and they have problems with SSL certs…. So you get errors.
I know I can go set the DNS server settings on the workstations. But I really don’t want to do this on all of my devices as they are mobile and switch networks, and on some networks not using the local dns breaks things. Like on the corporate network.
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Feb 12, 2013
Im facing with some DHCP lease issue and its like this,Our Cisco 2951 edge router is configured with local dhcp pool for a set of remote users when they connect through Cisco VPN which was working fine until we planned to change it to a Windows box that is configured for DHCP.The basic idea now is to relay the DHCP requests that are coming from the remote clients through Cisco VPN to the DHCP Windows server. So we added the scope on the server and changed the client config on the router as follows (highlighted is the dhcp relay config). [code]
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Dec 15, 2011
I am struggling with the following issue. I have 6 1130 Accesspoints in lightweight mode connected to a 2106 wlan controller which runs software version 7.0.98.0. Everything seems to work fine. Clients can connect to the wifi network. However, they don't get an ip address from the dhcp server which is on the same subnet as the wlan controller. See attached screenshots for configuration. I have also tried the internal dhcp server of the wlan controller, but the same problem remains.
The logs says: Dropping primary discovery request from AP e8:b7:4x:xx:xx:xx - maximum APs joined 6/6 There are 6 AP's connected
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Sep 9, 2012
Environment:
1. Core switch - Catalyst 6509e
vlans configured:
a. vlan 50 (wired clients)
[Code]....
here's the problem, wireless clients connected to WLAN guest keep getting DHCP leases from WLAN local 10.0.50.10 (scope 10.0.70.101 to 200)
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Jun 24, 2007
Here at HQ we have a 4402 WLC. At our remote sites we have 1231G APs running in autonomous mode. I upgraded one of the APs -- IOS 12.4(3g)JA -- to run LWAPP. Per release notes I've read upgraded 1231's do not support REAP/HREAP mode, consequently, it's running in LOCAL mode.
The AP is managed by the WLC. I created a WLAN for the remote site and assigned it to the MGMT interface; the remote site subnet doesn't exist in HQ. The DHCP server for the remote site is presently at that site; AP and DHCP server reside at the same place.
Clients authenticate successfully to the remote site AP, however, they are not getting DHCP addresses assigned. Does the DHCP server for the remote site have to reside in HQ since the AP is running in local mode? If so, where is that specified, on the MGMT interface config?
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May 3, 2012
My ASA 5505 has stopped giving out DHCP address to my machines.Everything was working fine and nothing has changed in the network. I've reloaded the firewall and clear all DHCP on the firewall I've even re-entered the cmd on the ASA.
I'm able to staticlly assigned address to the clients and all is way. When I do a DHCP debug on the ASA I don't see any events relating to the DHCP service apart from checking for lease expiry.
I've also tried to plug a machine straight into the ASA and no result. I finally did a packet capture and I am seeing the client machine sending out a DHCP discover packet and nothing else is responding.
My ASA config is:
dhcpd address 192.168.3.10-192.168.3.33 inside
dhcpd dns 8.8.4.4 interface inside
dhcpd option 3 ip 192.168.3.1 interface inside
dhcpd enable inside
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