ultrajohn's questions

Good day!

I logged into a Cisco management router located in our company network and issue the show users command and it gave the following output. The 3rd line vty 4 is me. I am concerned of the 2 other entries because I am 100% sure no one except me should be logged into the router from the inside during this hour. Also, the entries do not contain usernames. I've traced the IPs of these users to different locations around the globe. The output of the command changes from time to time.

What do these entries without username mean?

Thank you!

I am managing a small server room containing different pieces of networking equipment e.g. cisco3900, paloalto appliance, pc routers, various switches. The issue is that our server room has been operating without an air-conditioning unit for a long time already. I maybe stating the obvious here but I am afraid that at some point some of the networking equipment will fail because of the heat if they continue to run with only their built-in fans available for cooling. For example, the cisco3900 router's temperature is at 62 deg C at the moment. Specifically for the Cisco router, do I turn it off, or is it still operating at an acceptable temperature level?

ADDITIONAL DETAILS: I think, the ambient temperature of the room is close to 30 deg C.

I'm planning to setup Zeroshell as a router gateway for a school network on Virtualbox.

The host machine will run Ubuntu server edition. Then I will install Zeroshell as a guest Os with 4 configured lan adapters each of which are mapped to the physical ethernet cards on the machine.

The physical machine is connected to 3 WANs each of which are connected to the Internet. For each WAN, i will configure each virtual adapter as either bridge or nat depending on where they are connected. Bridged mode for the 2 wans which are connected to a modem/router with PPPOE and NAT for the last wan which is a leased line runnning on a /29 network.

The 4th ethernet adapter is connected to the Internal Lan of the school. This will be configured as bridged mode. This will be used by the Zeroshell guest OS as the default gateway for its DHCP configuration. Note that DHCP server of the LAN is running on Zeroshell that is on a virtual machine.

My question is, will this setup work and will it scale? What kind of problems I might encounter in the future? What is the minimum hardware requirements that I must use to get a decent performance out of this setup?

For some reason I do not know, several default packages in my Fedora 12 installation have gone missing, removed or uninstalled. Now, reinstalling fedora 12 is not a good idea in my current situation. Can someone guide on how can I install yum package using rpm? I mean, I can't find the repository for yum.

Thank you very much!

UPDATE:

An Hour Later, I have installed yum successfully but installing all the missing dependencies one by one! Thanks everyone!