Ubuntu 12.04 not connecting to wired ethernet

**n3m35i5** · April 4th, 2013

I just installed Ubuntu 12.04.02 alongside my Vista (didn't use wubi). On booting up, I configured my wired internet connection. It doesn't use DHCP, and uses a static private IP (given by my ISP) which by the use of NAT is assigned a public IP. I have entered all information like gateway, mask and DNS. Now when I startup Firefox and login to my ISP's router to connect, the internet speed is greatly reduced. My plan is for 256kbps and I get <10kBps. Also, the software center though doesn't show any error, doesn't update or install anything...Please help.

**gordintoronto** · April 5th, 2013

Am I correct that you have a modem, but no router? If so, NAT doesn't enter into the equation.

**Iowan** · April 5th, 2013

At one time (might still be the case) IPv6 could cause slowdowns.
Tweaking MTU also sometimes helped.
(Getting old and rusty.)

**n3m35i5** · April 5th, 2013

Originally Posted by gordintoronto

Am I correct that you have a modem, but no router? If so, NAT doesn't enter into the equation.

Actually, my ISP just provides a cable to my home, nothing else on my end. Since, my windows installation can access the net pretty well, so I am sure the problem lies with my Ubuntu config. And about the NAT, my ISP gave me a static private IP which gets translated to a public IP when I'm visiting the outside net, so I figured out there must be a NAT at their end.

**gordintoronto** · April 6th, 2013

I think we need a lot more details in order to help you. Actual IP addresses, details of how and what you specified to set up the network connection.

I think you are saying the ISP runs Ethernet into your house. I have never heard of that type of setup. Also, your plan seems very slow.

**n3m35i5** · April 11th, 2013

Originally Posted by gordintoronto

I think we need a lot more details in order to help you. Actual IP addresses, details of how and what you specified to set up the network connection.

I think you are saying the ISP runs Ethernet into your house. I have never heard of that type of setup. Also, your plan seems very slow.

Well, all the details you need are here:
https://answers.launchpad.net/ubuntu/+question/225883