Browsing articles tagged with "bind - Admins Goodies"
Jan 3, 2013
tom

removing the ‘www’ in bind9 dns

I want to create a record in my zone file which, by default goes to my webserver when I type in “mydomain.com” as opposed to “www.mydomain.com” <– working. can someone give me some pointers, I know this is probably very easy but the search terms lead google to just spit out useless info. UPDATED (with zone file) $ORIGIN mydomain.com.$TTL 3D@ SOA dns.mydomain.com. root.mydomain.com. (12 4h 1h 1w 1h) @ IN NS dns.mydomain.com.dns.mydomain.com. IN A my.ip.add.ress […]

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Dec 15, 2012
tom

Can you have multiple authoritative BIND DNS servers for the same zone, like AD-integrated DNS?

In an AD-integrated DNS system, there really isn’t a concept of one “Master” DNS server; all AD-integrated zones are authoritative and updatable across all DNS servers, and send updates to each other on a regular basis. Is there a similar methodology/ option/ capability in BIND? All I read about is setting up master/ slave but I don’t want to do that. Asked by Jeremy Holovacs No. Standard DNS protocol has no mechanism for Multi master […]

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Dec 3, 2012
tom

Where BIND9 saves its cache?

On Ubuntu 12.04 I installed BIND9 via apt-get install. I configure the server in a very simple way and it works in name resolution. Now I’m curious to read (if it’s possible) its cache. Reading the rndc manpage I tried to use the rndc flush view command, but it says rndc: `flush` failed: not found while if I run simply rndc flush it works. So, first of all, where I can find the BIND9 cache […]

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Dec 2, 2012
tom

Identifying the cause of my DNS failure (domain not propagating)

I have set up a DNS server with the help of two helpful tutorials: http://linuxconfig.org/linux-dns-server-bind-configuration http://ulyssesonline.com/2007/11/07/how-to-setup-a-dns-server-in-ubuntu/ I am using: Ubuntu Bind9 and had issues I tried negating on my own thanks to a question I posted here earlier that pointed out my mistake of using rfc 1918 addresses in my previous SOA record: $TTL 3D @ IN SOA ns.thejarbar.org. email. ( 13112012 28800 3600 604800 38400 ); thejarbar.org. IN A 10.0.0.42 @ IN NS ns.thejarbar,org. […]

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Nov 21, 2012
tom

Excessive CPU Utilization for Bind 9.8.1 `named` processes

I just noticed that named is eating vast amounts of CPU time for a very small network with only a few domains. Can someone help me determine what is misconfigured, please? Or how to debug this. top top – 14:13:08 up 25 days, 14:16, 1 user, load average: 1.04, 1.04, 1.05 Tasks: 149 total, 1 running, 148 sleeping, 0 stopped, 0 zombie %Cpu(s): 17.3 us, 4.3 sy, 0.0 ni, 78.2 id, 0.1 wa, 0.0 hi, […]

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Nov 19, 2012
tom

measures to take against a dns amplification attack

I recently discovered that my server was being used as part of a DNS DDOS. Basically, my BIND setup allowed recursion, and it was used to attack a certain IP address using IP spoofing. I took the necessary measures to stop this, and disabled recursion. I’m no longer an amplifier, which I guess solves the large problem, but I’m still receiving the queries en mass, and BIND is replying with “denied” to all of them. […]

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Nov 18, 2012
tom

2 virtual domains: one on port 80 one on port 8080, how?

I’ve been struggling with this, basically what I want is this: A virtual domain to run on the 80 another virtual domain to run FROM 80 TO 8080 what I’ve done so far is trying different combinations with apache, but all i got is having all the virtual domains pointing to port 80 this is my conf: <VirtualHost domain1.com:80> DocumentRoot /var/www/domain1 <Directory “/var/www/domain1″> allow from all Options +Indexes </Directory> ServerName domain1.com </VirtualHost><VirtualHost server.domain2.com:80> DocumentRoot /var/www […]

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Nov 17, 2012
tom

possible UDP attack on BIND?

hello everyone, i was surprised last month when my EC2 instance (ubuntu precise server), that is supposed to be under the free tier still, accumulated lots of traffic… today, while checking my current billing statement, i noticed i already have tons of traffic, while still in the middle of the month, and i’m fearing what my bill by the end of the month is going to be… i installed bandwidthd, and after few minutes, i […]

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Oct 26, 2012
tom

Losing connectivity with DNS

I have set up an ‘internal’ DNS at my work, basically we have an example.com domain name that is for internet, email etc and I have created on one of our linux network servers (debian) a DNS using bind9 with the domain example.inc. So based on my files below and the symptoms I’m describing; What can I do to fix this? These are the critical (I think) files I have modified: named.conf.local zone “example.inc” { […]

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Oct 20, 2012
tom

How to set up a DNS name server to always resolve to a constant IP address for every request

I am looking for a simple DNS name server set up to always return the same IP address no matter what the request is. The reason for this is we are a domain registrar and when a domain is first registered we need it to have valid name servers (and don’t want to have to first create name server records before registering a domain). We will then subsequently change the name server records after the […]

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