Huge problem; new to this job


I'm new to these forums and I am starting off with a huge problem. The
network I run at work (I'm very new to this) was configured years ago
and is run very haphazardly. Right now, nothing is working. Here's what
happened:
I took a vacation day on Friday and someone came by to test out our T1
lines because they'd been running slow. From what I've been told by the
office manager, he couldn't test them out so he "did something to the
server" so he could access our lines. Once he completed his testing,
our entire network went down. We have 2 offices and 1 server. Computers
in the office where the server is can print to our local printers and
get to our shared network drive, but there's no internet. Our remote
office can get to the internet only.
Here's the little bit of info I was able to gather earlier today:
1. System Event Viewer is showing error 20192. Remote Access. A
certificate could not be found. Connections that use the L2TP protocol
over IPSec require the installation of a machine certificate, also
known as a computer certificate. No L2TP calls will be accepted.
2. Ipconfig brings up Autoconfiguration IP Address: 169.254.228.227,
which from what I can find means APIPA is being used rather than DHCP.
But I don't know how to fix that.
3. Ipconfig /renew brings up this message: The following error occurred
when renewing adapter Local Area Connection: DHCP Server unreachable
4. Ipconfig /release brings up this message: All adapters bound to DHCP
do not have DHCP addresses. The addresses were automatically configured
and can not be released.


I don't know how to fix all of this and I'm supposed to be getting all
new printers and copiers installed first thing Monday morning, and
right now I don't have a working network to install them onto. Please
help!!


--
plaidapplered
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