Where does Freeradius get DNS information from?
Title: Message Hello, We are running a freeradius server to authenticate some DSL clients. Recently, we became aware that the DSL routers were getting some incorrect DNS data sent to them, but I'm not sure where the information is coming from. We're running freeradius 0.8.1 on RedHat Linux 7.2. The Radius server resides in a DMZ, but somehow the IP addresses that it is giving out to the DNS routers are the IP addresses of our internal DNS servers, which reside on a different network. I've looked thru the configuration files for the radius server, and I can't find a reference to our internal DNS server _anywhere_. I checked in /etc/resolv.conf, and the only server listed there is our primary external DNS server, which is the IP that radius should be giving out. So what I'm wondering is: Where is radius getting this DNS server information from? And how can I change it? thx! k
Re: Where does Freeradius get DNS information from?
Have you checked the configuration of the NAS device that you are using? You probably have a default profile set in there with particular DNS servers to be given to all connecting clients. -- Mark P. Hennessy [EMAIL PROTECTED] On Wed, 20 Aug 2003, Kevin Hanser wrote: Date: Wed, 20 Aug 2003 12:27:52 -0400 From: Kevin Hanser [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Where does Freeradius get DNS information from? Hello, We are running a freeradius server to authenticate some DSL clients. Recently, we became aware that the DSL routers were getting some incorrect DNS data sent to them, but I'm not sure where the information is coming from. We're running freeradius 0.8.1 on RedHat Linux 7.2. The Radius server resides in a DMZ, but somehow the IP addresses that it is giving out to the DNS routers are the IP addresses of our internal DNS servers, which reside on a different network. I've looked thru the configuration files for the radius server, and I can't find a reference to our internal DNS server _anywhere_. I checked in /etc/resolv.conf, and the only server listed there is our primary external DNS server, which is the IP that radius should be giving out. So what I'm wondering is: Where is radius getting this DNS server information from? And how can I change it? thx! k - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html
RE: Where does Freeradius get DNS information from?
The NAS device we're using is a Cisco router, and I've just re-checked the configuration there, and the only name server that I can find defined is the proper one: ip name-server a.b.c.d And the DSL clients end up getting 2 DNS servers -- our internal DNS servers... That's what's been confusing me about this... The only place I've found that has the internal DNS servers defined is on our DHCP server, but the radius server resides on a different network than the DHCP server, so it shouldn't be able to even see that machine. k -Original Message- From: Mark Hennessy [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 20, 2003 12:34 To: [EMAIL PROTECTED] Subject: Re: Where does Freeradius get DNS information from? Have you checked the configuration of the NAS device that you are using? You probably have a default profile set in there with particular DNS servers to be given to all connecting clients. -- Mark P. Hennessy [EMAIL PROTECTED] On Wed, 20 Aug 2003, Kevin Hanser wrote: Date: Wed, 20 Aug 2003 12:27:52 -0400 From: Kevin Hanser [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Where does Freeradius get DNS information from? Hello, We are running a freeradius server to authenticate some DSL clients. Recently, we became aware that the DSL routers were getting some incorrect DNS data sent to them, but I'm not sure where the information is coming from. We're running freeradius 0.8.1 on RedHat Linux 7.2. The Radius server resides in a DMZ, but somehow the IP addresses that it is giving out to the DNS routers are the IP addresses of our internal DNS servers, which reside on a different network. I've looked thru the configuration files for the radius server, and I can't find a reference to our internal DNS server _anywhere_. I checked in /etc/resolv.conf, and the only server listed there is our primary external DNS server, which is the IP that radius should be giving out. So what I'm wondering is: Where is radius getting this DNS server information from? And how can I change it? thx! k - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html
RE: Where does Freeradius get DNS information from?
Follow up on this: You are correct, it is coming from the Cisco router (sort of). We found that if we add this line: Async-bootp dns-server a.b.c.d e.f.g.h That we can assign the proper dns servers. I'm still not quite sure why it was getting this info from our internal DHCP server before that line was there, but that's another quirk for me to figure out. At least we've got the info to assign the proper dns servers to our clients now. Thanx! k -Original Message- From: Kevin Hanser Sent: Wednesday, August 20, 2003 12:41 To: [EMAIL PROTECTED] Subject: RE: Where does Freeradius get DNS information from? The NAS device we're using is a Cisco router, and I've just re-checked the configuration there, and the only name server that I can find defined is the proper one: ip name-server a.b.c.d And the DSL clients end up getting 2 DNS servers -- our internal DNS servers... That's what's been confusing me about this... The only place I've found that has the internal DNS servers defined is on our DHCP server, but the radius server resides on a different network than the DHCP server, so it shouldn't be able to even see that machine. k -Original Message- From: Mark Hennessy [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 20, 2003 12:34 To: [EMAIL PROTECTED] Subject: Re: Where does Freeradius get DNS information from? Have you checked the configuration of the NAS device that you are using? You probably have a default profile set in there with particular DNS servers to be given to all connecting clients. -- Mark P. Hennessy [EMAIL PROTECTED] On Wed, 20 Aug 2003, Kevin Hanser wrote: Date: Wed, 20 Aug 2003 12:27:52 -0400 From: Kevin Hanser [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: Where does Freeradius get DNS information from? Hello, We are running a freeradius server to authenticate some DSL clients. Recently, we became aware that the DSL routers were getting some incorrect DNS data sent to them, but I'm not sure where the information is coming from. We're running freeradius 0.8.1 on RedHat Linux 7.2. The Radius server resides in a DMZ, but somehow the IP addresses that it is giving out to the DNS routers are the IP addresses of our internal DNS servers, which reside on a different network. I've looked thru the configuration files for the radius server, and I can't find a reference to our internal DNS server _anywhere_. I checked in /etc/resolv.conf, and the only server listed there is our primary external DNS server, which is the IP that radius should be giving out. So what I'm wondering is: Where is radius getting this DNS server information from? And how can I change it? thx! k - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html - List info/subscribe/unsubscribe? See http://www.freeradius.org/list/users.html
