[lubuntu] I can't connect to Internet through my router TP-LINK WR741ND

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http://ubuntuforums.org – Hi!. This week I started to have a conectivity problem on my linux/windows computer. The router is new and was working properly for a week. The windows part connects correctly to the internet, while the linux OS (lubuntu 11.04) can't. This PC is connected to a router, which is connected to the modem (Huawei ZXDSL 831). With this setup I can't access the internet. At this point Ifconfig command says my computer has the ip which is strange because my router is setup to give addresses from on. The only workaround I know for this problem is to connect the PC directly to t ()