I could not find a subject for the DLink Dir-632 Wireless N 8 port router. So I'll post it here, the closet thing to the DIR-632. I just bought a DLINK DIR-632 on Feb 7, 2011, and I've had it a few weeks now. When directly hard-wired connected to the router, web browsing is generally fast. But when using wireless G or wireless N, with either WEP or WPA or no wireless security encryption at all, web browsing is slow, sometimes super, super slow!!!
I'm not sure what is going on, but it seems that the DNS lookups may be to blame. When I switch the wireless connection back to my Linksys WRT54GL router, browsing is fast, SUPER FAST! It is noticeably much, much slower to surf the web when connected over the wireless connection to the DIR-632 router as compared to the Linksys WRT54GL. And I get the same slowness whether I connect wirelessly to the DIR-632 without any network security, or with simple WEP, or with WPA enabled. The signal strengths to the DIR-632 router are all excellent in all cases, and the wireless connections always report at least 54 Mbps or better. So I know it's not the signal strength. I've even tried setting the DIR-632 to Channel 11, to achieve the highest GHz signal, to rule out any physical issues.
By default, the DIR-632's setting is checkmarked to 'Enable DNS Relay'. Is this slowness truly due to this being on?