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troubleshooting a WiFi setup
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The
Question...
I'm presently using an 8 or 9 decibel vertical antenna mounted about 20
feet off the water that feeds a Linksys WMP54G PCI adapter in a Dell
computer. Cable is LMR 400 with short coax adapters at each end. (I
have ample mounting area within the mast but it's about 6 feet from the
base of the antenna.) For the most part it all works well and I get
pretty fair range.
My other question has to do with the wireless setup on the boat. I
added a Linksys WRT54G wireless router hoping to be able to use it with
a laptop on the boat but the WMP and the WRT will not work together. If
the router is powered it works fine but I canÂ’t use the WMP
adapter - It will connect with an access point but not be able to
communicate until I unpower the router. I suspected it was an address
problem but we beat that to death with Linksys support to no avail. Any
solutions?
My Answer...
Read my article on WiFi Yacht dot net about DHCP. Turn off DHCP on
Linksys Router. Turn on Connection Sharing on Dell PC. Plug Dell PC
CAT5 into one of 4 LAN ports on Linksys Router. Do not use the
WAN/Internet port on Linksys Router. Connect to Internet with Dell PC.
Turn on Laptop ... it should work. If not check for after-market
Firewall software on Dell PC or Laptop. If found un-install it
(disabling will not help, must un-install it [repeat must un-install
it]).
Laptop gets an IP address in the range 192.168.0.X gateway of 0.1 (the
Dell PC). DNS server 0.1 (the Dell PC). Try pinging dell pc
192.168.0.1. Try pinging www.google.com. If that fails ping that on the
Dell PC get the IP of www.google.com from pinging on the Dell PC, ping
same on Laptop. Report back to me results.
Another problem will often occur. If WiFi Hotspot also uses the IP
range 192.168.0.X you're screwed. A router (or Windows Connection
Sharing) cannot have subnet 192.168.0.X on two network interfaces
(outside/Internet and inside/Lan). Windows stupidly was not allowed to
change that IP range numbering. As far as I know as of Vista this is
still stupidly the case. This is why I use other routers to share the
Internet, routers that can have the IP Address range changed.
A symptom of typical strange Connection Sharing problem = Can Ping
Internet host by IP Address but Not By Name. Aftermarket firewall
software is often blocking DNS resolution (DNS Proxy by the Main PC.)
Also occurs in some versions of XP on a daily basis. The "wiggle" to
make it work again = Turn off sharing, reboot turn on sharing and GO.
Please contact us for information or for a quote: Telephone Number is:
954-683-3426.
Thank You.
