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IP problem?
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05-07-2009 9:45pm#1
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But there's a funny thing, all sites are OK except www.opendns.com.
Now that is odd.
And I was able to get onto it earlier, but that was through hotspot shield.
curious
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Ahh no need for sorrows, a lot of folk are having grief tonight and are posting the same tip as your good self.
I've also added both OpenDNS to my network card as the primary & secondary DNS and it seems to improve things even more. I kept the Eircom ones as tertiary and quarternary dns just in case
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irishpancake wrote: »But there's a funny thing, all sites are OK except www.opendns.com.
Now that is odd.
And I was able to get onto it earlier, but that was through hotspot shield.
curious
Just confirmed that Opendns is accesible when I use Hotspot Shield, the VPN which by-passes the eircom network.
So the problem connecting to Opendns is an eircom network problem.0 -
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To add to Kerryman is this a once off or do you need to constantly update opendns codes (if thats what they are called)
Cheers
If you change the settings in your router, they should be available to any PC using your network, wireless or directly connected. This assumes that you allow your devices to obtain their IP addresses dynamically.
If your PC or Laptop has a Static set-up, then you may have to change DNS settings in Control Panel/Network Connections/Properties/TCP/IP/Properties.
Hopefully these will not have to be changed.
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it might help simplify things to think of dns server addresses like phone books.
open dns is like the internet equivalent of 11811 or 11850 or whatever.
when your PC wants to get to a web address it needs to find out it's IP address which is the underlying numbering system that the internet and other types of computer networks work on.
at the moment, eircoms directory listing is a little bit messed up, so by changing your DNS server addresses you're basically telling your computer to get the information on where to find the websites you're visiting from a different directory.
you can keep the changes permanent or you can change back to eircom when they're working properly again.
personally, something like this happened a few years ago and i stopped using my ISP's DNS servers then and have never gone back, even though I use a different ISP now.
additionally, if you use opendns and you have a family, they have family filters to automatically block out all the nasty stuff you don't want your kids looking at and since you are putting the dns settings into your router, every pc on your network would be protected.
go to opendns.com and have a look for more info.
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you'll most likely find that the only DNS server your PC is aware of is your router, which would be redirecting dns requests to whatever server(s) it's got set in it's configuration. in that respect any dns changes would be effective immediately without restarting th pc or router.irishpancake wrote: »Also, before making any changes, take a note of the original settings, in this case easy to remember, 0.0.0.0
although having said that, a reboot can't hurt.
flushing the local dns cache might work better though.
from a dos prompt, type ipconfig/flushdns and hit enter, then when that's finished type ipconfig/registerdns and hit enter again.
basically, your PC will keep a record of any dns requests it's made and what the answer was to save time looking up the information if you go to the same website again within a certain amount of time.
clearing the local dns cache will just get rid of this (potentially bad) information and force your PC to look up the IP addresses of all the sites you visit from scratch.0 -
you'll most likely find that the only DNS server your PC is aware of is your router, which would be redirecting dns requests to whatever server(s) it's got set in it's configuration. in that respect any dns changes would be effective immediately without restarting th pc or router.
although having said that, a reboot can't hurt.
flushing the local dns cache might work better though.
from a dos prompt, type ipconfig/flushdns and hit enter, then when that's finished type ipconfig/registerdns and hit enter again.
basically, your PC will keep a record of any dns requests it's made and what the answer was to save time looking up the information if you go to the same website again within a certain amount of time.
clearing the local dns cache will just get rid of this (potentially bad) information and force your PC to look up the IP addresses of all the sites you visit from scratch.
Point taken vibe :cool:
On the actual DNS problem which affected eircom, there seems to have been an attack on eircom's DNS servers, see here for info.
How come eircom never acknowledges these hack attacks, or gives any explanation to it's huge base of users which were adversely affected
I'm going to stick with the Opendns settings for good now.0 -
irishpancake wrote: »But there's a funny thing, all sites are OK except www.opendns.com.
Now that is odd.
And I was able to get onto it earlier, but that was through hotspot shield.
curious
OK, if you wanted to compromise the DNS of a particular ISP, would it not be sensible to also block access to a known good DNS service to prevent the removal of this compromise.0 -
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