I have a 4 port link sys hub, I want to uplink it to a cisco 3508 switch, but it is not linking with it, however when I connect it to a 3rd party switch it works ok. Can anyone help with is prob..

I have a Cisco PIX 515E firewall which I have config.. VPN on it, the VPN has been working with no prob.. for the past 3 years now, now I am getting a prob.. when I connect to the VPN it connect but I can't ping any server any more, when I look in th...