Troubles with my wireless card or configuration

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Something weird is happening every time I reboot my machine and log back in, where my connection apparently stops working after maybe forty minutes.

The network monitor doesn't report the connection lost and command line tools like ifconfig and iwconfig aren't reporting anything out of the ordinary and I've tried using ./networking ./network-manager ./networking-routes and trying all the possible combinations to no avail.

Even using ifconfig and turning the wlan device down and up again doesn't do crap Is this something to do with going to /proc/sys/net/ipv4 and manually changing some of the values ? I did this after reading a Linux quick step to security and I also suspected it was my firewall and PSAD adding my own IP or the routers IP to block, but I guess it isn't since I flushed Iptables ...

Can someone help me figure it out or make a suggestion at least ? Thanks

To be more precise, Chromium stops bringing up webpages where it says Webpage not available even thought my network monitor app for LXDE says it's still connected

-Update- Nothing worked, even changing some of the files in /proc/sys/net/ipv4 didn't seem to work

I'm even using a different wireless device and going to see how this works out. I think it might be a mis-configuration or something on my end.

Okay, I can ping my router without packet loss but still can't bring up webpages ? Ugh, nothing seems to be working for me. It looks like I'm having to use my Ipod Touch for a little while to look up information about my problem :/

Can you ping yahoo.com? If not, can you ping 98.138.253.109?

If you can successfully ping the IP address but not the URL, then your problem will most likely be a DNS problem.

If you've been playing around with your ipv4 file, did you make a backup of it first? If not, what editor did you use to screw it? If it's Vim, Emacs or the like, there may be a backup file in the dir. Look for a file with a similar name and a tilde (~) sign in it.

There are plenty of settings in that file that'll effect how you're getting out without effecting the connectivity status. You should be able to find an uncorrupt version of the file on the Internet to use. That'd be my first suggestion. Put things back the way they were before it stopped working and we'll go from there.

I did HP-UX way back around 1990, so I only have enough skill to get myself into trouble, but not out. A suggestion would be to try downloading SystemRescueCD ISO bootable Linux image, burn it, and boot that and see what happens. You can also put it on a USB drive, but I not had luck with that personally, haven't tried that hard either.

As I recall, it tells you what to run after boot to get the network setup, I think it is "net-setup", and then follow on with an ifconfig. Again, as I recall, the newer version (4.1.0) added a graphical config for wired and wireless.

I can't recall exactly what it says, but it has been my experience that you want it to load the whole CD, the second option in the first screen, so you can take the CD out, otherwise it locks the CD tray.

With that, you can hopefully at least separate from hardware issues and configuration issues. Divide and conquer. It also has some great utilities on the CD, I like MHDD to scan hard drives.

Another idea, if you have an Android phone, try downloading the app "Wifi Analyzer". It makes a graph of all routers it can find. You might be able to make sure its not your router. I use DD-WRT in my Asus router, have had zero problems with it, other than not enough signal strength in one of the bedrooms.

@MIcheal and ImAnAspie:

I may have finally gotten the problem solved, for some reason Iptables was blocking my ISP redirection (has something to do with my ISP), which explains why I couldn't bring up webpages.

So I flushed the rule out and now I can bring up webpages lol Thank you two for at least replying since I posted the same problem on a Debian support forum and didn't get any replies except for a "Me too !" type of reply.