To sum up:1st paragraph, yes to all that.
no fancy settings on the router, that I'm aware of. it was just basic
dhcp, dyanmic setup.
I don't know about a low limit set for the addresses, I don't think I
did anything with that issue.
btw, as soon I logged off vpn, soon after, the pc was seeing the
wireless part of the router, wasn't able to connect to it tho. I did
reset the router to factory settings (I did that last week)
I've 2 wireless settings, one basic and other advanced authentication,
wpa-wpk or something like that.
my other computer has that same dhcp issue as well
Each of your computers is able to automatically obtain DHCP network
configuration settings when it is the only PC connected directly to
your DSL/cable modem, but those same PCs are unable to obtain DHCP
settings when connected to your router. That leads me to believe that
your router is either misconfigured or broken. I'm guessing it's
misconfigured, but that's just a guess.
1. If you have a spare router you could use it as a DHCP server in
place of the (possibly broken) DHCP server in your current router.
2. If you're satisfied that your current router is broken, you could
replace it with a new router, or with a spare router if you have one.
3. You could simply forget about DHCP and assign all of the network
settings yourself. (This is a no cost solution, but it's also a
solution that is likely to have you back here asking further
questions, so it's up to you.)
4. Other options?