Windows Server 2003
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Why are Android Devices showing up in my DHCP Address Leases
I have broken up our company network into a couple of VLans.
1. VLan-1 = 192.168.1.X = Administrative VLan and Misclaneous Device Vlan.
a. Switches and Electrical/HVac panels
2. Servers VLan (not relevant here)
3. VLan-21 = 10.220.21.X = Windows Domain PC receiving DHCP.
a. DHCP Scope .55 - 254 for DHCP.
3. VLan-40 = 10.220.40.X = Wireless VLan = for Ipad and Wireless Cell phones (to receive email and internet).
My question is regarding our DHCP address. DHCP is woring just fine and has been woring for 3-Plus years now. However, I now have noticed that the Address leases (in teh VLan-21 DHCP SCope) are shwowing some android devices. It is if these android devices are getting IP Addresses for my VLan-21 Network. Please see screen shot.
My 1st question is why are these 'android' devices and 'Blank' devices showing up in the Address Leases? Is it because someone is connecting a "rouge" wireless router to an active 'VLan-21' jack and giving out connections that way?
When I connect my android device to my company wireless network(VLan-40), I can see my cell phone's wi-fi MAC address in the VLan-40 address leases. I do not see it in the VLan-21 address leases(that is what I would expect). What do you think is going on?
1. VLan-1 = 192.168.1.X = Administrative VLan and Misclaneous Device Vlan.
a. Switches and Electrical/HVac panels
2. Servers VLan (not relevant here)
3. VLan-21 = 10.220.21.X = Windows Domain PC receiving DHCP.
a. DHCP Scope .55 - 254 for DHCP.
3. VLan-40 = 10.220.40.X = Wireless VLan = for Ipad and Wireless Cell phones (to receive email and internet).
My question is regarding our DHCP address. DHCP is woring just fine and has been woring for 3-Plus years now. However, I now have noticed that the Address leases (in teh VLan-21 DHCP SCope) are shwowing some android devices. It is if these android devices are getting IP Addresses for my VLan-21 Network. Please see screen shot.
My 1st question is why are these 'android' devices and 'Blank' devices showing up in the Address Leases? Is it because someone is connecting a "rouge" wireless router to an active 'VLan-21' jack and giving out connections that way?
When I connect my android device to my company wireless network(VLan-40), I can see my cell phone's wi-fi MAC address in the VLan-40 address leases. I do not see it in the VLan-21 address leases(that is what I would expect). What do you think is going on?
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My suspisions and everyone else's in this thread are correct. It was a rouge DHCP router that someone clicked the reset button and becasue of that it collected an IP address with DHCP and it gave out IP Addresses with DHCP (with no password).
There was 1 ehter net connection connected to the VLan-21 Vlan from teh rouge DHCP router. That is where teh 192.168.1.X IP's were coming from.
Very annoying.
There was 1 ehter net connection connected to the VLan-21 Vlan from teh rouge DHCP router. That is where teh 192.168.1.X IP's were coming from.
Very annoying.
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Windows Server 2003
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Questions
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Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).