How can you tell if you have a firewall?
919314
there will be a firewall icon in the taskbar by the pc time . move ur mouse over the icons down there and if you have a firewall  when the mouse icon is over them icons i ur see a message pop up saying what  it is . if you dont have firewall the best one to have is zonealarm .pro. firewall & that is free. you can get that from  zonealarm .com
750400
You may need to allow more through your firewall.  See what your Firewall is set to, and change it.
711301
don't do that with the firewall, you need to go to tools....options and enable a few things.
615025
Yes. you have to read the documentation on your firewall to either disable the firewall or open the ports. A router can also block you from connecting to the right port see portforward.com
124757
check if you have an external firewall- some type of routers and modems have firewall in them- disable your firewall in  your system tray where you have the clock on lower right corner of screen. right click on the icon and disable or look for option to disable it
657332
It could be your firewall or something like that but you may try to adjust the settings.
168234
Well the above 2 answers good and enough for you. But in addition u can also set the firewall on.
423633
well...you could check your firewall\nor you can talk to your ISP
403424
Check your security and anti-virus setting and turn the firewall off.
81350
if your computer was running ok a fewday ago go to system recovery and take it back were it was runnin ok but it don't sound like you have firewall problems more like virus
210544
That's a pretty general question, but here is one basic test of connectivity: ping.\n\nOpen a command prompt (Start > [All] Programs > Accessories)\nType ipconfig <enter>\nNote the Default Gateway address (e.g. 192.168.1.1)\nType ping followed by the default gateway address then <enter> (e.g. ping 192.168.1.1)\nIf it is successful or not will tell you whether or not you have basic network connectivity.
503875
check that file sharing is enabled in your firewall and that all your computers on your network have the same workgroup name
267667
maybe you shouldn't open it if its blocked?\neither disable the firewall or delete it.
58872
sometimes if you hit the refresh button, it normally will let you get past the firewall.  You may also want to check all the plugs to make sure that they are secure.
14967
It depends on which firewall, and there are many kinds (both software and hardware). Most people probably have Windows XP's firewall, which can be turned on/off from the Control Panel.
665301
have you got your firewall on and could it be blocking it?
1113074
check the connection preferences and make sure you choose the right one, as in if you have firewall choose with "firewall".