Ubuntu Networking :: How To Build Internal DNS Server
Jan 14, 2010
How can i build an internal dns server for my network, but don't use the top level domain, e.g:. mycat.com. I want to use mycat.kgn. And I want to put a mycat.kgn mail server on the network for internal uses.
My setup:
dns mx mail2.mycat.com (my server)
mx mail.mycat.com (godaddy)
inet-gateway & firewall & mailserver:
centos 4, mail2.mycat.com
nic1 - internet
nic2 - 192.168.0.1
kerio email server 6
All workstation & server uses:
ip: (below)
netmask: 255.255.255.0
gateway: 192.168.0.1
dns: 192.168.0.1
Workstations:
windows & linux
nic1 - (192.168.0.20 - 192.168.0.199)
Printers:
HP laserjet
jetdirect (192.168.0.211 - 192.168.0.249)
Data server:
1. ubuntu 8.04 LTS, nic1 - 192.168.0.8
2. redhat AS 2.1, nic1 - 192.168.0.10
3. xenserver 5.0, nic1 - 192.168.0.11
- windows 2003 terminal server, xen-nic1 - 192.168.0.210
- winxp sp3 accpac, xen-nic2 - 192.168.0.2
- win2000 sp4, xen-nic2 - 192.168.0.200
Config: I need a dns server with:
dns mx zimbra.mycat.kgn 192.168.0.127
A mycat.kgn 192.168.0.1
A samba.mycat.kgn 192.168.0.128
A www.mycat.kgn 192.168.0.1
NS ns1.mycat.kgn 192.168.0.129
All workstation and servers:
ip: (same as above)
netmask: 255.255.255.0
gateway: 192.168.0.1
dns: 192.168.0.129
ldap all machine to zimbra.mycat.kgn for login info and password.
map drive g: to samba.mycat.kgn data-share (with users rights from ldap)
I tried to do this in virtualbox, but fail badly! I created 6 vm using ubuntu 804 and 910, but my dns was not getting any records with dig, so I found an howto on powerdns. But I had to use mycat.com and not mycat.kgn?
I will draw my network to be!
each machine:
ip: (sameas above)
gateway: 192.168.0.1
dns: 192.168.0.129
dns-nameserver 192.168.0.129
nameserver 192.168.0.129
and if the dns server does not find the info it forward it to the gateway 192.168.0.1
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Aug 29, 2010
Basically, i want to be able to type a domain in my browser e.g. default.dev and it direct to the ../www/default folder on the Ubuntu Server on my network. The reason being is that as a web developer i have a number of sites that i'm working on locally and i'm getting tired of adding the domain to my hosts file and then creating a virtual host in Apache - i believe this can be done with BIND - is this right? If so what steps are required?
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Nov 11, 2010
I have a registered domain that resolves (via dyndns) xxx.mydomain.com to my external facing router -easy no issues there. Behind the router I have several machines (some VMs) running webservers, mail etc... What I want to be able to do is redirect the external traffic based on xxx to the relevant internal machine and serve the content back to the external world.
I have tried using a http rewrite of xxx.mydomain.com to the relevant machine an it works fine from within my network, however externally the re-direct fails as the master DNS servers have no record of internal DNS setup in my network (obviously).
So is there anything I can do to get xxx. recognized externally? I'm only just starting to get my head around how DNS, HTTP, TCP etc all hang together. Am I barking up the wrong tree with rewrite? Should I be looking at proxys?
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Mar 31, 2010
Basically, I have a windows 2003 server virtual machine (vmware) inside Ubuntu 9.10.
The Ubuntu machine has IFconfig:
Code: sam@sam-laptop:~$ ifconfig
eth0 Link encap:Ethernet HWaddr 00:15:c5:b8:c8:8b
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
Interrupt:17
Why can't I ping or simply access the internal server on my ubuntu machine from a another computer on the 192.168.1.0 (slash)25 physical network? Do I need a bridge? Iptables?
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Aug 11, 2011
i am forwarding HTTP request to a internal server, it is quiet successful but access logs donot show the ip of the external m/c. Rather it shows the ip of the machine on which i have enabled port forwarding.
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Sep 23, 2010
We're having an issue with HTTP POST file uploads on our two Ubuntu PCs. For some reason, whenever one of our users attempts to submit a file in an HTML form, the request times out, usually with a 500 Internal Server Error message. This problem is not limited to one site, but occurs on all sites that use file uploads. Also, the problem does not appear to be with our network, as a Windows 7 PC on the same network can upload files to the same sites without any difficulties. The problem is not browser-specific; we have tested with Firefox, Epiphany, and Google Chrome and all produce the same results. The issue is relatively new, and was first observed within the last month; before this time, both machines had no problems uploading files.
Does anyone have ANY idea what could be causing this? I've tried a number of things, including rebooting the PCs, rebooting the network, disabling IPv6, etc. I'm not very experienced in Linux system administration, but I can use the terminal and am familiar with some terminal-based diagnostic tools, so if you need any additional info or want me to try something, please let me know! I've exhausted my own computer knowledge with regards to finding a solution to this problem.
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Feb 16, 2010
I have got a running mail server on CentOS5.4 Final using Zimbra free edition. . Assume that domain is organization.com.local And it is running fine with users created and bugzilla running on the same machine can send mails using this server. But it can obviously send messages to the internal users. There is this option to configure it to use external mail server to send mails outside the network but my external smtp server needs an authentication.Is it possible to configure it this way to use my external server to send mails from internal domain to say gmail?
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Nov 7, 2010
What is the fastest setup to do this? All I want is an internally authenticated webmail server that other servers can send mail to for collection of test emails. Don't need LDAP or anything fancy, just a internal LAN only webmail server. I've got Squirrelmail setup on Ubuntu Server and can't get authentication setup with Squirrelmail and every tutorial I read is way over complicated or has nothing on how to authenticate Squirrelmail with internal, system users.
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Mar 23, 2010
I am kinda stuck while providing solution for the above problem. I have achieved the fail over using keepalived but not sure how can we replicate the data from one server to other seamlessly and have them in sync with each other. My prime requirement for this project is end user should not notice the fail over and replicated copy of data should be available on the secondary as well.
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Feb 11, 2011
I have an init script running as a special build user which performs an automated build that fails with (Too many open files).I updated /etc/security/limits to allow the special user more open files, but that didn't work - the init script still isn't allowed more open files.Here's a demonstration of the problem;
Code:
$ su - sbsbuild -c "ulimit -n"
Password:
[code]....
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Apr 14, 2010
how to build my web server on ubuntu
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Jan 31, 2010
I want to have an internal DNS that would serves our LAN and I also had external DNS server (located on our ISP). I have configured my internal DNS .. by adding new A record named test.mydomain.com (for example) and I knew that test.mydomain.com also exists as A record on external DNS server. When I ping test.mydomain.com .. it still return from 202.x.x.x (it should be return from 172.16.250.1? It seems like my internal DNS config below not configured properly..
// named.conf
// Provided by Red Hat bind package to configure the ISC BIND named(8) DNS
// server as a caching only nameserver (as a localhost DNS resolver only).
// See /usr/share/doc/bind*/sample/ for example named configuration files.
options {
listen-on port 53 { 172.16.250.2; };
listen-on-v6 port 53 { ::1; };
directory "/var/named";
dump-file "/var/named/data/cache_dump.db";
statistics-file "/var/named/data/named_stats.txt";
memstatistics-file "/var/named/data/named_mem_stats.txt"; .....
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Jul 7, 2010
We want to build a couple internal web apps for about 150 people to use, maybe 10 concurrently of any one app/site. LAMPP seems to be pretty simple to use for all it does, but their website has the following disclaimer at the bottom of this post, and there's some people here, programmers who like to make things way more intense/"cool" for programmers than they need to be for a small shop, who agrue that it shouldn't be used in production. I'm not really sure our internal 150 people classify as the type of "production" they are referring to below, I think they more mean a public facing site. We're never going to grow any bigger than this people-wise, or ever make these public facing sites. Just looking for some advice, as lampp seems very easy to use, as well as easy to backup and restore the entire lampp folder and get going on another server quickly in the event of a disaster.
As mentioned before, XAMPP is not meant for production use but only for developers in a development environment. The way XAMPP is configured is to be open as possible and allowing the developer anything he/she wants. For development environments this is great but in a production environment it could be fatal.
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Jul 1, 2011
I am looking for the best/cheapest way to build a ubuntu server with 8tb of storage hanging off of it.
I don't feel it needs to be hardware raid, so more software raiding swap in and out failed disk drives.
The server itself normal duo core CPU with 2Gb of memory and i would like to have the internal drive of the O/S only.
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Dec 9, 2010
I build a LAMP server behind a router.The current situation is:1.I could access index.html of apache within the LAN.2.I could access the vsftp outside of the LAN.3.I could access the ssh outside of the LAN.I have configured my router to do reflections(although I don't know it's correct or not.). I think the LAMP works good since I could use it inside the LAN. The configuration of the router is at least partly right because ssh and vsftp work fine(I test by browsing the ip:74.***.***.*** in the lan, not 192.168.1.8 --this also works. ).I cannot access web service outside the LAN. And the error message is "Oops! Google Chrome could not connect to 74.***.***.***"Did I miss some configuration of router?Apache2?Ubuntu? I use the ubuntu server 2010.10 version.
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Feb 20, 2010
I'm in love with my Opensuse 11.2. Love my KDE 4.4. The only thing I miss from my Ubuntu installation, is the ability to use Boxee. I would be more than willing to compile Boxee from source. I only have 2 problems with that:
1) I don't know where I can find all the build-deps or what they are for that matter to build Boxee.
2) I'm running on a Netbook. Yes, my measly Intel Atom is no fun for compiling and building.
What are my options/what can I do to get Boxee up and running on 11.2? I've tried searching on build service for an RPM, but I think due to legal restrictions, Boxee can't be on there.
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Feb 16, 2011
looking for LIBEVENT... configure: error: Package requirements (libevent >= 2.0.10) were not met: In order to build transmission 2.21.I need libeventnew version of transmission,I need to build libevent-dev >= 2.0.10 and installed first.But I can't get any information about building development files for libevent.
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Sep 24, 2009
as I'm advancing in building some nice rpm I finally wanted to install on of my gems also the build was successful the actual install fails with missing dependencies.
Code:
$ rpm --root /home/sascha/rpmbuild/ -i ./RPMS/x86_64/memcached-1.4.1-2.x86_64.rpm
error: Failed dependencies:
libc.so.6()(64bit) is needed by memcached-1.4.1-2.x86_64
libc.so.6(GLIBC_2.2.5)(64bit) is needed by memcached-1.4.1-2.x86_64
[code]....
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Dec 6, 2010
I am currently working with a cloning project using FOG on Ubuntu 10.10 (Desktop). While there is certainly a learning curve, all seems to be going well.
For the initial project, I have this "cloning network" isolated completely. Meaning, it is not connected to my main network/domain switch - FOG is handling the DHCP, I have a dedicated managed switch handling the routing between the FOG server and the client clones.
The main problem I am having is that Ubuntu is not able to resolve the hostnames of the client computers.
I know this is because I do not have DNS setup on my Ubuntu PC.
What is the best route to take in order to resolve this? Can I use bind9 to take care of it, or is that too complicated for what I need it to do?
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May 31, 2011
CLIENT A - 10.10.10.2
|
ROUTER - eth0 - 10.10.10.1
ROUTER - eth1 - 10.10.20.1
[Code]....
Everything is working fine and CLIENT A can talk to CLIENT B and vice versa, with only one problem - CLIENT A cannot ping 10.10.30.1.
I checked routing several times, there is no NAT and firewall is disabled on the SERVER.
CLIENT B can ping and access any device in the diagram. CLIENT A can ping and access any device in the diagram too, however cannot ping eth1 of SERVER (10.10.30.1). ROUTER can ping any device in the diagram except eth1 of SERVER (10.10.30.1).
If I launch 'ping 10.10.30.1' from CLIENT A and run tcpdump on SERVER eth0 I see no hits at all. If I launch 'ping 10.10.30.1' from CLIENT A and run tcpdump on SERVER eth1 I see ICMP requests coming from CLIENT A but no replies.
It doesn't look like a routing problem because clients A and B can communicate with each other. Also, we have around 20 similar installations but this is the first time CLIENT A cannot ping internal interface of SERVER.
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May 24, 2010
my server are acting weird, how to build a new kernel ?
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Mar 9, 2011
What is the best way to build a few webservers. Not that I would need this amount of space but taking ..... for an example. How are they able to have so much storage performance. Is it clustering? I mean how do you get that much storage and the performance shared? I know with raid you can get alot of space but videos are massive? I know there has to be a lot of servers filled with hd's. but how do they run all as one?
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Sep 30, 2015
I installed debian 7 and apache 2.2 with virtualhosts. I'd like to run CGI, but always get internal server error. i tested it with a simple test.cgi file.I got this in apache error log.Wed Sep 30 21:39:02 2015] [error] [client 192.168.0.156] Premature end of script headers: test.cgi
When is switch off "Addhandler cgi-script .cgi" in the config file i see the code. Permissions are 755 on the whole directory. I have checked a2enmod, the modul is loaded (sudo a2enmod cgi)..here are the part of config files :
ScriptAlias /gestioip "/var/www/gestioip"
<Directory "/var/www/gestioip">
AddHandler cgi-script .cgi
AddDefaultCharset utf8
[code]...
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Jul 15, 2010
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Feb 12, 2010
I am tired of managing local Address Books and Calendars. I use either POP or IMAP email accounts now and want to keep the email accounts I have. What is a good Mail Server I can setup to Let me use a Global Address Book and Shared Calendar System between Outlook 2003 and Evolution, but not create email accounts? In Other words I want a Local Server I can setup that does nothing but manage a Global Address Book and Calendars. I want to keep using POP and IMAP accounts for the email side of things.
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Apr 23, 2010
I have several web servers running apache on my LAN. Each internal server hosts a number of domains.I would like to make these available to the internet and make sure they all get to use port 80 and 443.My idea was to put Apache on the firewall and have all http(s) traffic from the Internet to my firewall be redirected by Apache to the different internal apache servers. This, in theory, would allow me to keep the standard http(s) port.
Can this be done? I was thinking of mod_rewrite and mod_redirect but in all honesty, I'm a little at a loss on where to start.Can someone point me to relevant documentation or give me the basic idea on how to start?
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Jul 24, 2011
I'm running bind9 on Debian 6. I have a primary domain, 44kg.net, fully configured and working dynamically (the server also runs DHCPd and updates the DNS records properly).
[Code]....
To access my externally-facing website, which has a blog and a forum which are keyed to the external domain, I set up the domains in bind so they would resolve to the server's internal IP. This worked great for a few months, then inexplicably ceased working. I didn't touch anything, but it coincided with our router dropping its VLANs. I've moved the server to a different location and it's still not working properly. Whenever I try to lookup the external domains, I get SERVFAILs. This is annoying because the internal domain is fully working and I copied the basic settings.
[Code]....
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Nov 22, 2010
we have a DNS server is being used for external clients .Recently we installed awstat monioring tool in ordr to collect either ftp or mail statistic. Since our server is DNS server by defenition we may see all external clients requests to the ftp/mail services .But a LAN clients cannot be resolved by their IPs . The second nameserver line doesn't work. DNS server's conf file looks like :
search mycompany.com
nameserver 127.0.0.1
nameserver LAN_IP_Address
How to configure the server it will resolve both external and corporate clients ?
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May 31, 2011
how to disable or modify the email headers showing the internal IP and hostname of the server when using sendmail. I want this removed or change to just a domain name.
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Sep 16, 2010
Trying to install SW 13.1 (on DVD) on the following system: M/B Intel: DX38BT Processor Intel Core 2 Quad Q6700 - 2.66GHz, 8MB Cache, 1066MHz FSB, Socket 775 Memory Corsair Dual Channel 8192MB PC10600 DDR3 1333MHz Memory (4x2048MB) Graphics Diamond Radeon HD 3850 Video Card - Viper, 512MB GDDR3, PCI Express 2.0 P/S Ultra 1000W
My goal is to install the i386 build on one partition and the 64-bit build on another. I have been away from Linux for a while and am sick to death of Win7, want to come home. :-}
Booted on i386 side of DVD, system freezes after a couple of lines that start with ATA2. Does not respond to 3 finger salute, ctrl-c, nothing. Have to press reset. I have tried both huge.s and hugesmp.s kernels
Booted on 64-bit side, comes up fine. I performed the install, selected for automatic lilo install. Lilo install hung but I was able to reboot. I booted off the 64-bit side again, entered the following: huge.s root=/dev/sde3 rdinit= ro It booted fully to the login prompt but the keyboard does not work, no input.
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