Question about Linksys EtherFast Cable/DSL Router
Can I use multiple IP addresses with a the BEFSR41W?
Posted by Anonymous on
I KNOW I have seen this written up a few years ago in a Linksys knowledge base article... i recall this to be correct
Posted on Feb 15, 2008
Yes, however we recommend using the following procedure is the only way you can do so without a block of IP addresses. The example below is for instances where you have multiple public IP addresses that are not in block form. For our example the ISP has given us 3 Public IP addresses. One goes to the FTP server, Web Server, and the Router. You can setup the router for whomever your ISP is. If you have a dynamic IP address and you're unsure on the setup, please see the article on setting up the router with a static IP address. If you have a static IP address please our article on setting up static IP addresses with the router, and it will describe how to setup the router with a static IP address. Once the router is setup, it will provide the 3 PC's (In our example) with internet access. The remaining two public IP addresses should be assigned to the WEB Server and the FTP server. Note - The Web and FTP servers will not be on the Local Area Network of PC-1, PC-2, and PC.
Posted on Feb 16, 2006
Tips for a great answer:
address conflict occurs
when two computers on a LAN or the Internet have been assigned the same IP. IP
conflicts between two computers normally render either one or both of them
unusable for network operations.
Address Conflicts Happen
computers can acquire conflicting IP addresses in any of several ways:
· A system administrator assigns two
computers on the LAN the same Static IP Address.
· A system administrator assigns a
computer a static IP address within the local network's DHCP range (dynamic IP
range), and the same address is automatically assigned by the LAN DHCP
· A malfunction in the network's DHCP
server allows the same dynamic address to automatically be assigned to multiple
· An ISP accidentally assigns two
customers the same IP address (either statically or dynamically).
· A mobile computer is put into standby
/ hibernate mode and then awakened later.
other forms of IP conflicts can also occur on a network. For example, one computer
may experience an IP address conflict with itself if that computer is
configured with multiple Network Adapters. System administrators may also
create IP conflicts by accidentally connecting two ports of a network switch or
router to each other.
IP Address Conflicts
Microsoft Windows computers, if you attempt to set a fixed (static) IP address
that is already active on the local network, you will receive the following
pop-up error message:
The static IP address that was just configured is already in use on the
network. Please reconfigure a different IP address.
Microsoft Windows computers having dynamic IP conflicts, you should receive a
balloon error message in the Taskbar as soon as the operating system detects
There is an IP address conflict with another system on the network.
especially on older Windows computers, a message similar to the following may
instead appear in a pop-up window:
The system has detected a conflict for IP address...
On Mac or
Linux computers, a similar message will normally appear on screen.
following remedies for IP conflicts:
networks where IP addresses are fixed (statically assigned), ensure each local
host is configured with a
unique IP address.
2. If your
computer has a dynamically assigned address, releasing
and renewing its IP address can
workaround IP address conflicts.
3. If your home router is believed to have a faulty DHCP server causing IP conflicts on the home network, upgrading the router firmware may resolve this problem.
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