flushing the dns

Warning: Possible Dns Spoofing Detected!

location: linuxquestions.com - date: July 16, 2008
I get this error while doing and ssh from solaris to linux box. The hostname is an alias added in DNS for round robin connections. How can i resolve this issue permenantly, without any switch being used along with SSH. XXXXX{XXX}41:ssh XXXXX @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: POSSIBLE DNS SPOOFING DETECTED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ The RSA host key for XXXXX has changed, and the key for the according IP address XXXXXXXXXX is unchanged. This could either mean that DNS SPOOFING is happening or the IP address for the host and its host key have changed at the same time. Offending key for IP in /home/XXXX/.ssh/known_hosts:18 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropp

DNS lookups through a chroot, or using a vpn from inside a chroot

location: ubuntuforums.com - date: October 30, 2011
Hi Everyone, I have a fairly odd thing that I'm trying to do. At least, I haven't been able to find much in the way of instructions on this. A bit of back story (could probably skip this if you want): My work uses juniper's network connect for a vpn, and it only works on 32bit ubuntu with 32bit firefox and 32bit java. It has to be initiated from the web portal for it to connect to the vpn server. This web app doesn't run under 64bit linux, even with 32bit firefox and 32bit java. At least in the manner that is required for my vpn server. I have tried almost all methods I could find online to get it to work (even mad scientist's method), and none worked. I tested getting it to work in a 32bit virtual machine, and it worked fine. Now to the real problem: So, I decided to try to get it to work in a chroot. So, I set up a 32bit 11.10 chroot and installed 32bit java and firefox in it. And now I have it working to the point that I can run my 64bit firefox and the 32bit firefox at the sam

slow dns on rhel6 with ipv6 going through a firewall (yum ssh firefox)

location: linuxquestions.com - date: June 15, 2011
I wanted to post this here to help anyone that might have noticed any sort of performance issues with a RHEL 6 box. Im sure this issue will become a lot more prevelant when CentOS 6 comes out. It took me days of troubleshooting to figure this out and hopefully this will save a headache for others. These issues are also present on Fedora 10 and Fedora 11. I've seen quite a few forum posts on it already. (ie http://www.linuxquestions.org/questi...a-11-a-778069/) Skip to the bottom for the solution. Here are the symptoms: -ssh to the machine takes a long time before you finally get in. This usually points to DNS issues. -dig and host succeed and resolve names very fast. (few ms) -telnet to a port takes a longer than usual. -Firefox is slow -Yum is slow Just on a hunch I disabled ipv6 and performance improved, but was still a lot slower than usual for certain applications. After a bunch of troubleshooting here's what I discovered: 1. RHEL5 works perfectly.

How to use Linux DNS Server for windows machines

location: ubuntuforums.com - date: October 16, 2011
Hi guys, My situation is like this: I'm using Windows XP I installed VMBox and a Virtual Machine which is an Ubuntu Server On Ubuntu Server, I installed Apache and Bind9. I also changed /etc/resolv.conf to use the DNS installed. Testing: On Ubuntu Server, I can ping 192.168.56.102(ubuntu server) On my windows XP, I can open web browser at http://192.168.56.102 But I can't use http://example.com (which was configured in Bind 9 to point to 192.168.56.102) Can someone help me please? Kind Regards,

DNS poissoning MyFamiliy.com (I tought no one can do this to linux)

location: ubuntuforums.com - date: July 25, 2009
Hi early this morning, while i was trying to open www.kubuntu.com, something strange.. my browser didn't view my desire page, instead of viewing a pages titled MyFamily.com I try ubuntuforums.org (it works) , but www.coldplay.com also drives to MyFamily.com some sites work, but many failed. googling around, i found that it's DNS poisoning problem. a solution is doing cache flush.. unfortunately, i dont know how to cache flush in linux. I've tried to flush my iptables by typing Code: sudo iptables --flush but the problem persist. This is really annoying.. why this MyFamily.com do this? any suggestions?

DNS Settings Deleted Every Time I Reboot

location: ubuntuforums.com - date: October 18, 2011
So I did a fresh install of 11.10 Ubuntu today and I made sure I configured /etc/resolv.conf so that my DNS information is correct. My system is running a static I.P. address as shown below: Code: [email protected]:~$ cat /etc/network/interfaces # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet static address 10.1.10.204 netmask 255.255.255.0 network 10.1.10.0 broadcast 10.1.10.255 gateway 10.1.10.1 # dns-* options are implemented by the resolvconf package, if installed dns-search database.org Now also I configured my /etc/resolv.conf: Code: [email protected]:~$ cat /etc/resolv.conf # Generated by NetworkManager search database.org nameserver 10.1.1.6 nameserver 10.1.1.7 Now everytime I reboot my machine, the info from /etc/resolv.conf is

DNS not resolving, Ubuntu 10.04 VmWare Player 4.0

location: ubuntuforums.com - date: October 15, 2011
Hello, I am new to Linux and these forums, but I like to think I'm fairly good with computers in general. Anyway, I made an Ubuntu 10.04 VM using VMWare 4.0 (most recent version), and I can connect to the network just fine. I am able to ping my windows box (which the vm is on) as well as the gateway from the VM, and visa-versa. I am also able to ping ip addresses outside of my network (i.e. google's ip address, newegg's ip address, etc.). I am unable to ping any server names, however, such as google.com or newegg.com. Using NAT as the network interface for the VM works just fine, but that uses my windows IP to connect, rather than being a separate host altogether. I would rather use bridged, which connects it directly to the physical network with its own IP and MAC and such. I have tried editing the /etc/resolv.conf to include both the dns server in my windows' ipconfig /all as well as the two dns servers my router lists in its settings -- no go. I've also tried using a static

Flush DNS in CentOS

location: linuxquestions.com - date: December 20, 2009
I use "ipconfig /flushdns" in Windows to flush DNS. I wonder what is the equivalent of this command in CentOS.

how to flush dns cache

location: linuxquestions.com - date: October 18, 2011
hello all, can anyone tell me the command to flush dns cache?

Howto flush dns cache

location: linuxquestions.com - date: May 9, 2010
Hi, Slackware64 13.0 I have a website that has been migrated to a new server. After a few days I'm still pointing at the old server and the hosting company have recommended that I flush my dns cache. A quick google for this in linux seemed to recommend restarting the nscd daemon but nscd -g tells me it's not running anyway. I connect to Virginmedia via wired ethernet to a Belkin N1 router so is there a way I can do this I wonder, either via Virginmedia or Slackware?