On Wed, Jul 9, 2008 at 4:03 AM, Amos Shapira <<a href="mailto:amos.shapira@gmail.com">amos.shapira@gmail.com</a>> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
2008/7/9 Lanny Marcus <<a href="mailto:lmmailinglists@gmail.com">lmmailinglists@gmail.com</a>>:<br>
<div><div></div><div class="Wj3C7c">> I believe this is completely OT, but I want to be positive. I have a fully<br>
> up to date CentOS 5.2 box. During the past week, when surfing with Firefox<br>
> (and today, while testing with Konqueror), frequently, especially when DNS<br>
> is slow, I am seeing references to <a href="http://opendns.com" target="_blank">opendns.com</a> At times, I end up on<br>
> <a href="http://opendns.com" target="_blank">opendns.com</a> web pages, instead of at the web site I'm trying to get to. My<br>
> ISP, the phone company, claims this is not coming from their end and that<br>
> they are not using <a href="http://opendns.com" target="_blank">opendns.com</a>. I was told they have two (2) DNS servers. I<br>
> haven't changed anything in my IPCop Firewall/Router box and my belief is<br>
> that this is coming from my ISP or upstream from there. . If using<br>
> <a href="http://opendns.com" target="_blank">opendns.com</a> is something new in CentOS 5.2, please let me know. TIA.<br>
<br>
</div></div>Could it be that some server you connect to uses opendns' servers for<br>
their own DNS service?<br>
Which web sites are you trying to surf to when you reach OpenDNS?</blockquote></div><br>Amos: This is an intermittent problem and I believe it began one week ago. The first time it happened, I was trying to connect to a Secure (https) web site at <a href="http://irs.gov">irs.gov</a> and I got a warning message from Firefox that the SSL certificate belonged to <a href="http://opendns.com">opendns.com</a> which was very troubling.... That is the first time I called my ISP about <a href="http://opendns.com">opendns.com</a> I have also seen references to <a href="http://opendns.com">opendns.com</a> while trying to connect to other web sites. I suspect that my ISP (the phone company) is using <a href="http://opendns.com">opendns.com</a> but the Supervisor in support that I spoke with does not think that is true. Of course, she is not the Network person in charge of their 2 DNS servers, so she may be unaware of what happens upstream.<br>
<br>Since then, when the DNS is slow, I have seen references to <a href="http://opendns.com">opendns.com</a> at the lower left hand corner of Firefox, where it shows what sites it is trying to connect to, transferring from, etc. For example, yesterday, in that area, I saw "<a href="http://guide.opendns.com">guide.opendns.com</a> Waiting for reply"<br>
<br>I am beginning to look into the idea of having my own Caching DNS Server, as was suggested in this thread last night. I took a *very* quick look at IPCop (which is my current Firewall/Router box) and I think it has provisions for Dynamic DNS built in, but not Caching DNS. I also took a very quick look at the SME Server documentation, which I was able to get last night after I switched to KDE and I think it also has provisions for Dynamic DNS but not DNS Caching. When I have more time available, I will read more about dnscache part of djbdns, which was suggested earlier in this thread, as an option to BIND. Lanny<br>