Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Attention: The Community will be in read-only mode on 12/14/2017 from 12:00 am pacific to 11:30 am.

During this time you will only be able to see content. Other interactions such as posting, replying to questions, or marking content as helpful will be disabled for few hours.

We apologize for the inconvenience while we perform important updates to the Community.

New Member

Cable modems and switches

Hi, I have a 8 port switch and 4 computers.

One is going to be my internet server by running Linux and the other 3 computers are going to use Windows Me, Windows XP and Windows 2000 Professional.

Since I have to get a dynamic IP address from my ISP, can I mask the other 3 computers using a NAT or a proxy server?

The tricky part is: if I use only one network card in the Linux box, I have to assign it to obtain automatically the IP. But at the same time, I have to configure it manually for my LAN.

Thanks!

Dave

1 REPLY
oz
New Member

Re: Cable modems and switches

using a dynamic ip for an internet server is not so good as your DNS will get messy and IANA will hate you and it will cost a fortune updating cnames to the new addresses

But I think you mean internet portal so to speak rather that a server being resolved by DNS.

Trick with the cable modems is to let the linux box resolve to the dhcp server FIRST. Then add another NIC to the linux box and NAT under the other card. So the original NIC will be your outside addy and the new card the inside addy and point all the other boxes to the inside IP

otherwise it will be a pain . as think about arp if you DHCP to the wrong NIC the arp table will be messed up

oz

130
Views
0
Helpful
1
Replies
CreatePlease to create content