How To Fix Wifi Adhoc Network Problems

A very common cause of adhoc network problems is the version of software that came with your Wifi network card, checkout your manufacturers website and see if a more uptodate version of the software is available, many of these come with there own networking software with easy to setup adhoc network software.

Cannot get an adhoc network working from a USB network adapter

This can occur when a computer only has USB 1 type ports, either add a USB 2 card or install an internal network card if possible.

I get a connection but cannot browse

Have you enabled Windows ICS or Internet Connection Sharing ?, this must be enabled first, even then we have found ICS to be quite flaky and recommend a free product called AnalogX proxy server, it's very small and robust.

Try setting IP addresses to static not DHCP otherwise it can take a long time to find an address.

Make sure your firewall is set to allow browsing on port 80, plus any other services you need such as FTP, SMTP etc, simple way to test if the firewall is causing problems is to simply disable and then test.

If you are using an internet connection via PPPoE Make sure your computer has the correct MTU network settings, firstly find your gateway address on your client pc, (from the Start Menu, type CMD, then IPCONFIG)

Now type Ping -F -L 1500 xxx.xxx.xxx (type your gateway address into xxx.xxx.xxx)

If you receive an error try pinging -F -L1450

what we need to achieve from this is a ping response and you need your setting to be as close to 1500 as possible, so keep going lower or higher until you find this number.

Note if you get a ping response from 1500 this will not work for you

Once you have it you need to enter the following into the registry

Goto

Regedit/HK_LOCAL_MACHINE/SYSTEM/CurrentControlSet

/Services/TCPIP/Parameters/Interfaces

Create a new DWORD value call it MTU, double click on it choose the Decimal option and enter the MTU number you found earlier.

I have a connection but it keeps dropping How fast is the connection you've chosen? Try to slow the connection down, selecting B instead of G will go from 54 to 11 mbps

Adhoc networks do have a place in networking, but only a temporary one, I only ever use Adhoc as a last resort, the only advantage of using Adhoc is convenience and cost, but as routers are becoming cheaper it simply is not worth the hassle of using it,

Generally adhoc will be slower, more problematic, the range will not be as good as a wifi router, and of course you need to keep the host pc on whenever another pc wishes to use the internet.

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