Florida Dan Premium Member join:2001-07-06 Boynton Beach, FL
2 recommendations |
With DNS Flaw Now Public, Attack Code Imminent"One day after a security company accidentally posted details of a serious flaw in the Internet's Domain Name System (DNS), hackers are saying that software that exploits this flaw is sure to pop up soon." (More...). |
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Its a SecretPlease speak into the microphone Premium Member join:2008-02-23 Da wet coast
1 recommendation |
Nice. The idiot from Matasano should be shown the door. And this from a security company? |
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sivranVive Vivaldi Premium Member join:2003-09-15 Irving, TX |
to Florida Dan
Bring it on. My network's ready. |
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Cabal Premium Member join:2007-01-21 |
to Florida Dan
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your moderator at work
hidden :
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JohnInSJ Premium Member join:2003-09-22 Aptos, CA |
to Florida Dan
Re: With DNS Flaw Now Public, Attack Code ImminentOpenDNS, and just about every other DNS has been patched already. This was more a media event then anything else. |
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Its a SecretPlease speak into the microphone Premium Member join:2008-02-23 Da wet coast |
Perhaps they all were playing catchup, but good to see the fix is in place! |
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to Florida Dan
To be safe from this flaw: does one need to patch the local systems in addition to using a DNS server that's safe from this flaw. |
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to JohnInSJ
said by JohnInSJ:OpenDNS, and just about every other DNS has been patched already. This was more a media event then anything else. SoCal Road Runner's DNS servers have NOT [as of this writing] been secured. Hopefully all this RR slowdown stuff happening won't keep them from allocating the resources to resolve this issue which IMO should be Job 1. -amy- |
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jbobReach Out and Touch Someone Premium Member join:2004-04-26 Little Rock, AR ·Comcast XFINITY Asus GT-AX6000 Asus RT-AC66U B1
1 recommendation |
to JohnInSJ
said by JohnInSJ:OpenDNS, and just about every other DNS has been patched already. This was more a media event then anything else. According to this thread: » Change your DNS away from AT&T NOW!!!AT&T DNS servers are not patched either. If true that's pretty lame and dangerous. |
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SteveI know your IP address
join:2001-03-10 Tustin, CA
1 recommendation |
to Florida Dan
You guys are all idiots - I've been invulnerable to this for a long time. I just use a really really really really big hosts file |
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3 edits
2 recommendations |
to Florida Dan
DNS Randomness TestsDNS Resolver(s) Tested: 208.69.32.14 (bld4.ash.opendns.com) appears to have GREAT source port randomness and GREAT transaction ID randomness. The essence of the problem is that DNS resolvers don't always use enough randomness in their transaction IDs and query source ports. Increasing the amount of randomness increases the difficulty of a successful poisoning attack.
This page exists to help you learn if your ISP's nameservers are vulnerable to this type of attack. If you click on the button below, we will test the randomness of your ISP DNS resolver.For test visit: » www.dns-oarc.net/oarc/se ··· sentropyThe test takes a few seconds to complete. When its done you'll see a page where the transaction ID and source port randomness will be rated either GREAT, GOOD, or POOR. If you see a POOR rating, we recommend that contact your ISP and ask if they have plans to upgrade their nameserver software before August 7th. |
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TheWiseGuyDog And Butterfly MVM join:2002-07-04 East Stroudsburg, PA |
Re: With DNS Flaw Now Public, Attack Code ImminentThanks for the link.
OOL seems to have just patched, the link indicated they had done it right, versus dox which indicated possible NAT. Looks as if they use a larger sample. |
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caffeinatorComing soon to a cup near you.. Premium Member join:2005-01-16 00000 |
to SUMware2
Re: DNS Randomness TestsNice one..the other test never did work on my machine. However, using my primary DNS server from the ISP I get:
Source Port Randomness: POOR (one port used but it's a high range) Transaction ID Randomness: GREAT (25 diff. ID's used)
So, is that a problem? I use openDNS as my secondary as a failsafe FWIW.
-CaFF |
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Libra Premium Member join:2003-08-06 USA |
to SUMware2
I did this test twice on my 98se computer and got this:
1. 68.237.161.37 appears to have POOR source port randomness and GREAT transaction ID randomness. 2. 68.237.161.38 appears to have POOR source port randomness and GREAT transaction ID randomness.
The first time I did this test the results were the same but the number was 68.237.161.36.
I also did the test on our XP computer which has the MS Patch, and AOL running - AOL came up great for both tests, but my dsl numbers (similar to above) had the same poor source port and great randomness.
I have Verizon DSL with the Westell 2200 modem (that has a NAT Firewall router) and I use a switch to connect both pcs.
When Dan Kaminsky first had his test both computers tested "your dns server appears safe". After he changed the test, both computers show "your NAT is interfering".
I don't understand all of this. How do I fix this (or does Verizon have to fix this)? Also, I don't know how to switch to an open DNS.
Thank you.
Sincerely, Libra |
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TheWiseGuyDog And Butterfly MVM join:2002-07-04 East Stroudsburg, PA |
To switch to opendns follow the instructions in Section 4 of the link below (instructions quoted) for windows 98 and use the following IP addresses for DNS servers, (ignore the Domain instructions and the gateway instructions.) 208.67.222.222 208.67.220.220 » Satellite Forum FAQ » [DW4000] I'm sharing my connection on a LAN. Do I need to do more?said by faq :
Windows 98:
Start => Settings => Control Panel => click on the Network icon or right-click on the Network Neighborhood icon and choose 'Properties'. Either way gets you into the Network configuration screens. From the list of installed clients, protocols and services, locate TCP/IP bound to the NIC It will look something like this: TCP/IP -> your network card. The arrow indicates the protocol is bound to that adapter. Highlight that and then click the Properties button. This gets you into the TCP/IP configuration screens. Click the DNS Configuration tab. Put as dot in the 'Enable DNS' radio button. Then add the DNS servers,
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FFH5 Premium Member join:2002-03-03 Tavistock NJ |
to Florida Dan
Re: With DNS Flaw Now Public, Attack Code Imminentsaid by Florida Dan:"One day after a security company accidentally posted details of a serious flaw in the Internet's Domain Name System (DNS), hackers are saying that software that exploits this flaw is sure to pop up soon." (More...). I would question whether that release was accidental. Seems more like it was done on purpose because they were annoyed that they weren't given all the info and part of the "in-crowd" that Kaminsky gave the info to. |
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FFH5 1 edit |
to JohnInSJ
Good test to check your ISPs DNS serverssaid by JohnInSJ:OpenDNS, and just about every other DNS has been patched already. This was more a media event then anything else. If you want to check whether your ISPs DNS servers are updated, you can run this test. » entropy.dns-oarc.net/test/It tests for BOTH port randomness and Transaction ID randomness. I use Opendns and they showed GREAT on both tests. But my ISPs DNS(Comcast) that I use as the 3rd DNS entry in my list showed as POOR on the port randomness test. |
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jbobReach Out and Touch Someone Premium Member join:2004-04-26 Little Rock, AR |
jbob
Premium Member
2008-Jul-24 3:16 pm
FYI The OARC test may not be as accurate on Comcast. See this thread: » [DNS] Comcast and the DNS Server flaw issueEven Dan Kaminsky has chimed in. |
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FFH5 Premium Member join:2002-03-03 Tavistock NJ |
FFH5
Premium Member
2008-Jul-24 3:28 pm
Thanks for update. I did try the doxpara test too. But the doxpara test only tests the 1st DNS server it finds in the DNS list for the computer. The entropy test tests all the entries in the computers DNS list. So that made it easier to use. In any case, the opendns servers test as well as or better than Comcasts and I'll stick with them. |
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TheWiseGuyDog And Butterfly MVM join:2002-07-04 East Stroudsburg, PA |
to jbob
It seems both tests can give different results at times, especially if the servers source ports are not completely random. Have gotten results from Poor to Great with the new test. In looking at the ports used, it looks as if they tend to be in one range and then change to another range for my ISP. |
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Florida Dan Premium Member join:2001-07-06 Boynton Beach, FL |
Re: With DNS Flaw Now Public, Attack Code ImminentThank you OpenDNS! |
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Libra Premium Member join:2003-08-06 USA |
to TheWiseGuy
Re: DNS Randomness TestsHi WiseGuy, Thank you for your instructions. However, I ran into a problem: after I inserted the two dns numbers and clicked "okay" I got this message "In order to use DNS you must specify a host name for your computer." I didn't know what to put in, so I canceled it.
I'm also wondering what I have to do for the XP computer.
Thank you.
Sincerely, Libra |
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SipSizzurpFo' Shizzle Premium Member join:2005-12-28 Houston, TX 1 edit |
said by Libra:... after I inserted the two dns numbers and clicked "okay" I got this message "In order to use DNS you must specify a host name for your computer." If that is your Win98 machine, then the host name will be fine with anything you enter. For the XP box see the screen shot. |
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SparrowCrystal Sky Premium Member join:2002-12-03 Sachakhand |
Sparrow
Premium Member
2008-Jul-25 12:40 am
SipSizzurp , It's much easier to use the OpenDNS page. It guides a client through with implicit and easy directions. One can open an account, download the updater and you are on your way. There is also a forum for support questions. |
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SipSizzurpFo' Shizzle Premium Member join:2005-12-28 Houston, TX |
said by Sparrow:...open an account, download the updater... |
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to Sparrow
said by Sparrow:One can open an account OpenDNS states that creating an account is purely optional and completely unnecessary to use their service. |
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Libra Premium Member join:2003-08-06 USA |
to SipSizzurp
Thank you, SipSizurp, for posting the pictures for me. In another thread I found out I could put those openDNS numbers into my Westell modem, so I did that instead and it covered both computer.
Sincerely, Libra |
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Imagine Reason
Anon
2008-Jul-31 10:48 am
OpenDNS is a private company and not open source as its name may imply. They also hijack location bar searches. Just so everyone knows. |
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FFH5 Premium Member join:2002-03-03 Tavistock NJ |
FFH5
Premium Member
2008-Jul-31 10:54 am
said by Imagine Reason :
OpenDNS is a private company and not open source as its name may imply. They also hijack location bar searches. Just so everyone knows. That can be easily turned off: » Re: rogers inserting advertisements into my browser - WTF? |
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