|I am having a strange issue were my Internet browsing is sometimes unavailable or slow. Let me start with what equipment and software I am running. 1st. I have AT&T U-verse (Worst Router Ever) for my Internet. 2nd. Netscreen 5GT as a gateway for all clients to access the Internet (DNS OFF & DHCP OFF). 3rd. I have two High End Network Servers running Ubuntu 10, MaraDNS, Samba4 (Windows Domain) and several irrelevant services. First Server is Running DHCP & Primary DNS. The Second Server is Running Secondary DNS. Both Servers sync DNS records using rsync. 4th. I also have at least 4 constant/always connected Windows 7 Clients.|
Sometime last week we started experiencing browsing issues were the web page comes up with unavailable and other times the page will load the HTML but the CSS and some images will timeout. My first thought was MaraDNS was the problem because it was the last thing I touched meaning I switched from Bind9 because of compatibility issues (long story. don't ask.). After running DNS Benchmark tests it shows my DNS Servers are preforming great, possibly better then most public DNS Servers. Next I tried flushing my network by flipping the main power switch to off for several moments then restarting the whole network. This fixed the problem for a couple hours but returned again later. The only test that I see showing any issues is speedtest.net. I have the 18MB package from AT&T which I typically get close to 17MB a second with low ping time. But with this issue my results now are 1.11MB Down, 0.10MB Up and 564MS Ping. During the first half of the test the meter has a popping like moment going from 0 -> 500KB -> 400KB -> 700KB -> 600KB -> 1.1MB -> 1MB -> 1.5MB then slowly dies off at the end. Before it would shot all the way up the 17MB no problem.
I would really appreciate it if anyone could help me. I am at the end of rope of networking knowledge with this one. If you have any suggestions for Linux or Windows tests I could run please ask and I would be more then happy to post them here.
Please keep the topic about the software I am running and don't tell me something like reinstall bind9 or downgrade your Ubuntu version because if I did that it would open a whole new can of worms.
Joel T Greene