See Unauthorized Dhcp Servers In Network?
Apr 20, 2011how can i see unauthorized dhcp servers in my network
View 1 Replies
ADVERTISEMENT
Cisco Switching/Routing :: 3750 - How To Block Unauthorized DHCP SOHO Router
Jan 20, 2012If it's possible, how do you protect/block a unauthorized DHCP SOHO router with NAT form a Cisco 3750?
View 16 Replies View RelatedTwo DHCP Servers On Different Subnets Same Physical Network?
Aug 14, 2012I've done a very crude drawing of the network setup I'm working on. I just need to run an idea past some network guru's to see if I'm right about my idea.
The existing network consists of
Internet
Proxy Server
Several switches scattered around school
PC's
What the school wants to do is setup a side-along wireless network that uses the same physical switches but on a different subnet. The current subnet is 10.172.1.x .
To facilitate this I'm running a 2008r2 running RIP V2 to route internet traffic to 192.168.1.x subnet. I've had the wireless units use a static address and their own dhcp servers on the 192.168.1.x subnet. Wireless devices found their way to the internet fine. But I'd like to control the addresses from a single point of contact, hence the 2nd domain server running 2008r2. There are reasons for using a 2nd server, I've covered this in previous topics. If it's important, lets call it an intellectual exercise and leave it at that.
The question(s) : If I run a DHCP server on the 2nd server serving 192.168.1.x addresses, then any device on the physical network will obtain either an 192. or a 10. address correct ? The wireless devices will only take a 192. address because the wan address is statically assigned to a 192. address ?
The 2nd question : By setting a static routes out of the 2nd nic on the 2nd server, I can control the dhcp server so it will ONLY route dhcp requests to the statically assigned wireless devices ?
Servers :: Dhcp Services Affecting Network Connectivity?
Jan 31, 2012win 2003 dhcp server. when I leave dhcp services OFF i can ping the server fine. once i turn ON dhcp services the connecting drops in and out.. what is going on here?
My users are unable to get a steady connection to the dhcp server.
Home Network :: Unauthorized Network Name And Password Change?
May 12, 2012Simply put, a wireless network was set up with a network name and password in a senior community of primarily beginner users. Recently the name and password became changed to that of a community member named, let's say, "Joe". After addressing the router several times to change things back - only to find that the network name reverted to Joe - I changed the router password from admin to a unique pw and I confirmed that Remote Management was off. Next day... it was Joe again
View 3 Replies View RelatedHome Network :: Unauthorized Name And Password Change?
Nov 1, 2012In short, I had the following problem in the past but it solved itself when people physically left the area. Now they are back, the problem is occurring and this time I have as many router settings as I can find to maybe aid in the solution.This is the problem:We have a wireless network where the physical equipment is not available to users and yet, the local network name and password continues to be changed wirelessly FROM say, "ABC network" with network password "ABC secret password" to "Jimmy's Network" and network password "some new string of letters and numbers". (we know who Jimmy is but will not approach him until we learn if this situation is inadvertent on his part or more purposeful, which we doubt as of now)Cisco Lynksys Wireless-N Home Router WRT120N[CODE]
View 1 Replies View RelatedCisco AAA/Identity/Nac :: 6509 - Detect And Block Unauthorized Devices / Users In Network
Sep 25, 2012we have Cisco 6509 as a access switch in our network. Each user has an IP phone and a computer. we are going to implement 802.1X for end users by next month. I need to check all the users activity in the network like if someone plug an access point to the network or a router.I just checked Cisco NAC and how to detect those activities on the network.
I need to get more details on Cisco NAC or other products for that purpose. also what is the difference between Cisco NAC and application like Microsoft TMG?
is it agent less or I have to install something on computers? is it working as a default router for users computers?
Servers :: Connect 5 Servers Together To Create A Private Network?
Apr 16, 2011i'm trying to connect 5 servers together to create a private network.Each server has a network of it's own and i'm trying to make all 5 servers communicate with each other to share and search data simultaneously..
View 16 Replies View RelatedServers :: 2 Dhcp Server On The Same Lan Segment?
Apr 14, 20112 dhcp server on the same lan segment not thesame ip add series , how can i prevent to lease ip from another ip series
View 2 Replies View RelatedServers :: DHCP Superscoping Or Resubnetting
Feb 21, 2012I have a LAN running on a 10.60.1.* scope and I am running out of IP addresses. My windows server 2003 IP is 10.60.1.3 router is 10.60.1.4, If I create a superscope with 10.60.1.* and 10.60.2.* scopes within it and add an IP address from the 10.60.2.* range to both the servers and routers network configurations would this allow the clients on both scopes to see the network? The router links our office to other offices as well would the new IP range cause all kinds of routing issues?I know with the resubnetting option changing to a 255.255.254.0 from the current 255.255.255.0 would allow the use of 10.60.0.1-10.60.1.254 in a single subnet but I suspect this would cause problems with seeing the other offices unless all routers were reconfigured to recognise our offices new subnet mask.
View 1 Replies View RelatedServers :: Set Up Active Directory Without DHCP
Mar 23, 2011I am trying to set up a small domain for my business. I just purchased a Windows 2008 server and would like to use it as my domain controller.Also, I just had a new ATT DSL line put in. It came with a 2Wire modem/4-port router/wireless router device, therefore the modem can handle DHCP. The line has a static IP address as well so that I can eventually use my own exchange server and web server.I have tried 2 different configurations and couldn't get either to work) I tried to put the router into Bridged Mode and use DHCP server on my server using a PPPoe connection to connect to the Internet. I was confused as to what my static IP address and default gateway of my server should be.2) Then I tried to turn DHCP server off on the server and routing back on the modem/router. This didn't work either.What method would you recommend and why? Also I have some additional questions on each method.
Method 1)
* What is the static IP address of the server. Is it in the 192.168.1.x address or the static IP assigned to my account?
* Do I need a second Nic Card And Router to connect to the rest of my network or can I use the router provide
* What would the Static IP addresses of the additional PC be. Do I need more than 1 static IP from AT&T Method 2)
* Will this allow me to use all internal IP addresses on my machines and use port forwarding if I want a specific box to be a web server or exchange server.
Servers :: How To Change From NO To YES In DHCP Enabled
Jan 19, 2011Ethernet adapter Local Area Connection 2; DHCP Enabled: No
View 4 Replies View RelatedServers :: DHCP Clients And Internet Connections
Jan 11, 2013I 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?
View 1 Replies View RelatedServers :: Unable To Get DHCP IP From 2008 R2 DC ISA 2006
Mar 6, 2012I have Server 2008 R2 DC & One ISA server 2006 enterprise. im facing problem with DHCP unable to give DHCP IP from internal LAN. Its taking IP from External LAN IP i.e. connected to Linksys external Router which has DHCP enabled with different IP class i.e .class B. After shutdown client PC it will take 0.0.0.0 no IP will be assigned & says linited connectivity.
View 4 Replies View Related2 DHCP Servers On Same Subnet Or Linking Two Subnets?
Aug 6, 2011I have two locations both about 800meters apart, one is my home and the other address is a campsite where i have a linked router network (WDS with routers running ddwrt) where campers can all use the internet and also i have several IP cameras. Obviously both address have different gateways and therefore their own DHCP server. Everything was running perfectly until.I linked both of my address up using a long range antenna and now i am having problems.
Sometimes the two DHCP servers are competing with each other (i need both addresses on the same subnet in order to view my IP cams from home) and sometimes the computers log on to the wrong gateway. Its very annoying because the only way i can resolve it is by turning of the "linking routers" for a minute and then the Computers log onto the correct gateway. This happens to clients both side of the bridge. I have many different clients on both side of the bridge so assigning each computer (via windows) its fixed default gateway and DNS is out of the question as some of the clients are Camper's PC's and mine and my wifes laptops swap between both locations.
Now my query is, how can i block both DCHP servers from going over the bridge? OR can i have them on both separate subnets and still view my IP camera and still access all the routers from each subnet (i need this because sometimes i need to reboot the routers from home)
Cisco WAN :: C1700 - How To Automatically Add DNS Servers From ISP Into DHCP
Dec 27, 2010I have cisco router C1700. Interface FastEthernet0 is connected to ISP and obtain public IP and DNS via dhcp.On interface FastEthernet1 is connected private network. On router is configured dhcp pool that assigns addresses to private network connected on FastEthernet1. Is there configuration that automatically add the DNS servers from my ISP into the DHCP pool?
View 5 Replies View RelatedCisco :: 3550 Implementing Multiple DHCP Servers
May 2, 2011i have the following scenario that i'm requesting you guys verify if it will work.I have a 3550 catalyst switch running EMI and an auotomous 1131AG aironet ap, i have two dhcp pools already setup on the switch one for the LAN and the other for the wireless clients.There are two vlans on both the switch and ap for LAN and wireless clients.I have already setup multiple SSID's to be broadcasted from the AP, is there a way i can bind one SSID to the lan dhcp pool and the other to the wireless clients dhcp pool?
View 1 Replies View RelatedServers :: DHCP Server Failed On Diagnostic Test Windows
Jul 29, 2011dhcp server failed while running network diagnostic test for windows xp
View 1 Replies View RelatedCisco Wireless :: WLC2106 Pointing 2 Different WLANs To DHCP Servers
Feb 15, 2013I have a WLC 2106 which is configured and working as follows: [code] how do i get the AP at Site B to use the local server (10.0.28.x) to hand out DHCP leases?
View 3 Replies View RelatedCisco Switching/Routing :: C3750 - How To Configure 2 DHCP Servers For Two User Vlans
May 1, 2012I can't seem to find any info on how to configure 2 DHCP server pools on a C3750, to use with 2 user vlans. The purpose is that users in vlan 1 should get an IP address from DHCP server1, and users in vlan 2 should get an IP address from DHCP server2. Both DHCP servers are configured in a stack of C3750 switches, which acts a a L2 switch.
View 2 Replies View RelatedCisco Switching/Routing :: 2601X / NAT Translations DHCP And Access To Internal Servers
Jan 19, 2013I'm using a 2601X router connecting to a broadband connections. The following NAT connections is working but I need to do NAT exemptions to set up my VPN appliance on the DMZ. I see a lot of documentation on how to use a pool of public addresses to do that, but I only have the one dhcp address from my isp.
!
boot system flash:c2600-adventerprisek9-mz.124-25d.bin
!
!
!
interface FastEthernet0/0
[code]....
Cisco Switching/Routing :: Catalyst 3560X-24T-S - Setup DHCP Servers On Layer 3 Switch?
Apr 1, 2012Do you have the ability to setup DHCP servers on this layer 3 switch? I know I can with my old 3550 switch. Want to upgrade and make sure this model supports setting up dhcp servers on it.
View 3 Replies View RelatedBroadband :: PC Access By Unauthorized Persons
Jul 1, 2011some people are accessing my computer from another place how can i give protection to my computer?
View 2 Replies View RelatedRouters / Switches :: How To Block Unauthorized User
Jul 18, 2011i have distributed my internet through lan by router .but i think that, that user whom i have gave my net is forwarding to other users too through hub.
View 1 Replies View RelatedWireless :: Typing 192.168.0.1 And Webpage Says HTTP 401 Unauthorized
Dec 17, 2011192.168.0.1 "HTTP 401 unauthorized access: Authorization is required to access the configuration server. You must enter the correct username and/or password."I am trying to set up my Netgear wireless router. I have my username and password, but never get the chance to type it in. My Default Gateway is set to 192.168.0.1, but when I type it in the web address, I get the HTTP 401 error message above. I can access the internet through LAN cable now, but would like to get wireless set up to do so..
Windows IP Configuration Host Name . . . . . . . . . . . . : User-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
[Code]....
Wireless :: Prevent Unauthorized Access With Window XP?
Aug 3, 2011I am using wire less internet in a public space with my personnel lap top, my question is how to stop unauthorized access to my lap top desk top, drives and other files.
View 1 Replies View RelatedCisco VPN :: 5520 - Getting Unauthorized Connection Mechanism
Jun 12, 2012I have a Cisco 5520 cluster and Cisco Anyconnect Secure Mobility Client 3.0.5080. I eventually want to connact by means of a Smard Card and I was able to connect a view weeks ago. Now I am hastled by the error Logon denied, unauthorized connection mechanism, contact your administrator. Well that's me and a do not know anymore where to look on the Asa. I thought it had something to do with the authentication method, but AAA (AD or Local), nor cetificates is now working.
Cisco's solution...:
Error: "Login Denied , unauthorized connection mechanism , contact your administrator"
AnyConnect clients are failing to connect to a Cisco ASA. The error in the AnyConnect window is "Login Denied , unauthorized connection mechanism , contact your administrator".
Change Password To Prevent Unauthorized Access By Other People?
Feb 15, 2012How do I change my password to prevent unauthorized access by other people?
View 2 Replies View RelatedHow To Display Custom Page For Unauthorized Website Access
Feb 12, 2012We have blocked some sites in router which our user cannot access and it gets them default browser message "pages cannot be displayed". But I want to display pages like "You are trying to access unauthorized website" or something like that when they try to open such websites.
View 1 Replies View RelatedCisco Switches :: SG200-08 - 802.1x Unauthorized Access / MAC-authentication
Jun 14, 2011I use 802.1x to authenticate the company-network devices - authentication works fine. I do not use dynamic V LAN --> static V LAN-config on 802.1x ports --> authenticated devices have access to the network.
Is it possible to use a guest-V LAN? un authenticated devices should connect to an other v lan than authenticated devices.
One more question: Is MAC-authentication also possible?
Switch: SLM2008T V01
Firmware is: 1.0.1.0
Servers :: Can't Connect On Any Network?
Jan 16, 2013I'm having a problem connecting to multiple servers. I do know that I have stopped the windows firewall and taken out Norton and avg, yet I still can't connect to any servers. I've even tried on other networks! I can download torrents and surf the internet just fine though. I can't connect to an online class server to do my homework, and I've also tried to start playing WOW but neither will connect. I also don't see peer guardian 2 in *services*
View 7 Replies View RelatedServers :: How To Connect Two Pc To Network
Jul 23, 2011how to connect another computer to network
View 1 Replies View RelatedServers :: How To Change The Network
Jan 11, 2011how to change the network
View 1 Replies View Related