Run DHCP only after wpa_supplicant has connected (wired 802.1x)

I have a network here that uses 802.1x on the wired network to authenticate for greater privilege, BUT without (or “before”) auth will place the machine in a default/quarantine network. For good luck, that default network answers DHCP, and once you are authenticated another DHCP is needed to give you the correct/desired IP address. I’m … Read more

Dynamic DNS Updates with Wireless and Wired interfaces

We have offices full of Windows & Mac users who obtain IP addresses from a Windows DHCP server, which in turn updates Dynamic DNS entries. We are noticing major inconsistencies with the entries, and have found that the problem is occurring more on Macs than on windows, and even more when users are frequently switching … Read more

Downloads are consistently corrupt, what are the potential causes?

I am consistently experiencing corrupt downloads over TCP/IP and Ethernet on a small LAN, the downloads are coming from different sources on the Internet. WAN is comcast cable.. NIC is brand new. My theory is that this is being caused by a bad ethernet cable. What are the possible causes? I am in the process … Read more

Ubuntu wired network disconnected

I am not able to establish a wired network connection between two computers on which I just installed Ubuntu 10.04. I am new to this environment. Unlike in the Windows environment, where it happens by just connecting them with a cable, Ubuntu keeps flashing a notification saying “Wired network disconnected”. Am I missing a driver … Read more

ubuntu 14.04 ifconfig doesn’t show eth0

I have ubuntu 14.04 LTS on Asus EeePC 1215b and I can’t connect to wired internet connection. I know it’s not bios setting (Lan is enabled). I tried to find out more about state of connection so these are solutions I’ve found: ifconfig lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP … Read more

Connected to a wired network, but internet doesn’t work

Wired network shows connected, but internet doesn’t work. Iam using Ubuntu 17.04 sudo lshw -C network shows following in terminal : description: Ethernet interface product: RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:01:00.0 logical name: enp1s0 version: 07 serial: fc:45:96:84:73:b8 size: 10Mbit/s capacity: 100Mbit/s width: 64 … Read more

Networking Issues After Updating to Windows 10

I recently updated two computers from Windows 7 to Windows 10 that were on the same wired network and worked just fine. After the update, computer A and B can see both computers on the network. Computer A can ping and access files on computer B but computer B can’t do either of those things. … Read more

Slow LAN speed 10 mbps instead of 100 mbps

I’ve just bought Mele Quieter 2 mini PC and faced the problem with low speed of “Realtek PCIe GbE Family Controller” adapter. It always shows connection as 10 mbps: What I’ve tried: Reinstall/try different OS (including Linux) – same speed Reinstall/update drivers of all kind Switching cables/ports/routers of all kind Forcing “100mbit full duplex” setting … Read more