Server :: Distribute Securenets File From NIS Master To Slave?
Jan 25, 2011
I have a large environment with many VLANs and NIS slaves serving the VLANs. Previously we have not used a securenets file (don't worry; we don't use NIS for passwords, just NFS maps), but I'd like to start. The number of NIS slaves makes it annoying to update a securenets file on each when we add a new VLAN. Is there a way to propagate the securenets file to each slave when I update it on the master?If not, I guess I can live with propagating the file once and only visiting new slaves when I build them, because in 99% of cases a NIS slave only serves its own subnet.
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Nov 29, 2010
I configured a master DNS server 192.168.2.10 working OK. After that I configure a DNS Slave Server (92.168.2.11)the initial replication worked fine. This is test environment for my certification. I see how the zones from my master are transferred
zones in Master
training.com.db
transferred zone to my slave when I started named service
sec.training.com.db
That's Ok but I added some IPs to resolve to my master zone
webserver IN A 192.168.2.30
fileserver IN A 192.168.2.31
I restart/reload named on master and after that I go to slave and restart/reload but zones wuth the new values are not replicated. How long does it take for slave to take the changes from master? how is the procedure manual or automatic? I see If I go to slave and delete sec.training.com and restart named the zone with the changes is transferred but that is very manual... I am including my DNS Configuration so you can take a look.
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Apr 12, 2011
I have bind configured with Internal and External views, but the slave server is transferring only the Internal zone files for both Internal and External - a diff shows no difference, and the log shows the same serial number.What am I missing in the config so the slave server properly receives updates from the master for both views?
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Jan 27, 2010
I have set up a master BIND DNS server with 2 slaves. All the services start up fine on all 3 servers, but zones and named.conf info is not being replicated. The 3 servers are tentatively installed on a Xen virtual server for testing purposes. All 3 servers are 64bit and installed with: -> CentOS release 5.4 (Final) - 2.6.18-164.10.1.el5xen -> BIND 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.2
All 3 servers are fully updated. All 3 servers have static IP addresses. The services on all 3 servers start up without any apparent issues. Master server: # /etc/init.d/named restart ; tail -f /var/log/messages
[Code]...
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Feb 19, 2011
I have configured master and slave Bind servers. Everything works fine. But whenever I add a new zone entry at master server it is not getting updated at slave server in logs I see this error:
client 192.168.1.1#43428: view external: received notify for zone 'yourdomainname.com': not authoritative
At master server I do not see any error or warning message. This error clearly indicates that named.conf file does not have zone entry in it or domain name is wrong. While checking the named.conf file I see that the zone entry has not been updated at slave server. If I update it manually and reload named on slave then zone files (db files) are getting created without any issue and any modification at master server for the zone records are also getting updated. My concern is why zone record is not getting appended at slave server in named.conf file.
Is there anything I am missing in the configuration. I am pasting the steps which I have followed to configure my master and slave server:
Configure Bind as master and slave server
Install Bind on your server
yum install bind
OR
sudu apt-get install bind9
Generate RNDC Key using the command
rndc-confgen -a -k rndc-key
it will stored in /etc/rndc-key file
Master Server IP 192.168.0.1
Slave Server IP 192.168.1.1
Master Server Configuration
options .....
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Jul 11, 2011
In our Server they configure Master / Slave Dns using SSL authentication while tranfering the zone files, i dont have much idea about ssl authentication for Dns, how it will works
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Aug 12, 2010
I started over combining the first parts of this guide: [URL]..ubuntu8.04 (Only the first few parts in terms of configuration and naming). Then I used this guide: [URL]..Surprisingly enough all steps worked.
1. Now I need to set up LAMP servers with MySQL master/slave replication and Apache rsync.
2. Next i need to add BIND to both my Load Balancers with master/slave backup and replication...
Are there any guides to look at to follow on these? Can tou point me to the right direction for BIND with replication.
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May 3, 2010
Have someone used Linux heartbeat to send email when the Slave server becomes the Master? I've read I can configure the MailTo under.
But I really don't know how to do it. I basically need my primary server to send an email when it becomes inactive and all the activities are manage by the secondary node.
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Aug 14, 2010
i'm about to perform a fresh ubuntu install, and i was wondering if anyone knew whether installing on the slave or master drive mattered. i know if you're installing on the same drives it's slightly faster for ubuntu to be installed first, but that doesn't seem to be the case since i have two separate drives
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Mar 15, 2010
I installed bind 9 sucessfully, and create many zones on its.
I want to biuld 1 slave server but i have problem :
How to transfer all zone from master to slave server ?
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May 1, 2011
I have an EeePC 901, with a 4gb SSD and a 16gb SSD installed. Trying to get Natty installed and hit a few problems not least of which, that it won't fit on the 4gb drive! However in my BIOS setup under HDD config it says:
Secondary Master=4gb
Secondary Slave=16gb
I have no other devices attached. Why aren't they Primary? And I can't seem to switch them round.
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Jan 27, 2010
Is there any possible to convert slave to master, and enable writing to db?
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May 13, 2010
How to configure the master and slave on 5 Sata disks? Is there that or it is automatic.I install Debian, ok, master boot ok, on the first sataAnd at reboot, just after install, the boot hangs and no grub appears.
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May 13, 2011
I'm setting up a Master and Slave OpenLDAP (ver. 2.4.25) use Replication method following {URL]. When I used slapdcat (slapdcat -l master_dump.ldif), I got a message:
root@ldap:/usr/local/openldap/sbin# ./slapcat -l master_dump.ldif
/usr/local/openldap/etc/openldap/slapd.conf: line 89: <replogfile> keyword is obsolete (ignored)
/usr/local/openldap/etc/openldap/slapd.conf: line 91: <replica> keyword is obsolete (ignored)
bdb_db_open: warning - no DB_CONFIG file found in directory /usr/local/openldap/var/openldap-data: (2).
Expect poor performance for suffix "dc=abc,dc=com".
bdb_monitor_db_open: monitoring disabled; configure monitor database to enable
My Master slapd.conf is:
# Require 112-bit (3DES or better) encryption for updates
# Require 63-bit encryption for simple bind
# security ssf=1 update_ssf=112 simple_bind=64
# Sample access control policy:
# Root DSE: allow anyone to read it
# Subschema (sub)entry DSE: allow anyone to read it
# Other DSEs:
# Allow self write access
# Allow authenticated users read access
# Allow anonymous users to authenticate
# Directives needed to implement policy:
# access to dn.base="" by * read
# access to dn.base="cn=Subschema" by * read
# access to *
# by self write
# by users read
# by anonymous auth
# if no access controls are present, the default policy allows anyone and everyone to read anything but restricts updates to rootdn. (e.g., "access to * by * read") .....
My Slave slapd.conf is similar configuration to the Master Server...
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Feb 8, 2011
I need to perform instant filecopy between a pair of servers. Its loosely based on a master slave setup as we have ucarp floating a virtual IP between the two. services are on both boxes (tftp, apache). I'm happy with that, I now need a way to instantly sync files from set directories, as we could see problems if files have changed should the system fail over without being in sync
I know I could cron *1 but I don't want it running EVERY minute, in any case, if the change was within the last minute, then it wouldn't have the change anyway. I think it can be done with rsync daemons on box boxes, but I can't find a guide to to this. ATM the slave has been setup to accept rsync from the master, so I just need the config to have all changes on the master instantly replicated.
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Nov 13, 2009
I'm managing a residential network. Each flat is its own subnet, and can only communicate with the other flats through a router (i.e. no broadcast). 95% of these 300 subnets only contains windows computers (from lambda users).
My final goal is to be able to browse the entire network from any computer.
I set up a samba server acting as a wins server, and every computer is aware of it because it is registered in the dhcp. So name resolution is working fine for everyone.
The same samba server is set to be the "Domain master browser":
workgroup = WORKGROUP
wins support = yes
prefered master = yes
local master = yes
domain master = yes
os level = 65
When I browse the network (using "net view" or "browstat view"), I can only see the servers which are in the same subnet as the domain master browser.
Now, when in a subnet the computers arrange themselves to find a "local master browser", the only visible computers are the one in that subnet.
What I don't understand is why all the local masters don't synchronize their lists with the domain master.
So, to sum up, every subnet get the following behaviour:
-if a local master is elected, the only visible computers are the one in the same subnet.
-if no local master is elected, the only visible computers are the one in the subnet of the domain master.
-if I add another samba, configured as a local master winning all elections, then the magic is working and the lists are synchronized.
What is expected:
-every computer can see all the computer from all the subnets.
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Mar 23, 2011
I have more than 60 ubuntu systems in my network. I want to copy files from one system to other ubuntu systems. All IP addresses are listed in a text file. So what command can I use to complete the task?
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Jan 22, 2011
How can read the file /var/etc/allInOne.cfg and distribute its contents on multiple cfg files using C language. /var/etc/allInOne.cfg contain the data and the path of each text file.
The source file "/var/etc/allInOne.cfg "look like this:
line1
line2
...
line10
filePath:/var/etc/file1.cfg
line12
line13
...
line14
filePath:/var/etc/file2.cfg
linen
..
filePath:/var/etc/filen.cfg
the result will be :
The expected result is:
/var/etc/file1.cfg will contain line1 to line10
/var/etc/file2.cfg will contain line 12 to line13
/var/etc/filen.cfg will contain linen to linen-1
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Mar 31, 2010
I have a load balancer with 2 web servers behind it. The web servers rsync with cloud storage to update their apache directories 1 time every hour. Apache is just running php pages that pull/push data to a DB so they dont need to be updated that often. However I need to figure out how to implement a Master/Master MySQL setup to have my web servers point to for the PHP stuff. I need to implement it without having a single point of failure. The Load balancers are useless for failover as they only detect availability based on Ping request. So putting a master/master setup behind a Load Balancer is out. what is the best way to setup the master/master mysql in a HA setup without the use of a load balancer provided by the host?
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May 19, 2011
I'm trying to setup a server to distribute CentOS 5.6 over a the network with PXE. I found and followed [URL] but that guide is certainly incomplete. I have DHCP working and other machines will try and boot but get a TFTP timeout. I don't plan on using Kickstart at this time. What do I need to do next? What am I missing?
[Code]....
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Jul 25, 2011
Currently, I have configured a email server as primary email server Backup Email server is in my ISP and store all email in a mailbox.
configure my primary email server to connect to my ISP server and fetch all email from there and distribute to local user's mail box.
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Sep 14, 2009
this should be trivial for all you big sysadmin guys My box is a firewall/gateway. ETH0 is on the Internet-side, and is fully auto-configured (DHCP client) from my ISP. ETH1 is on the LAN-side, has DHCPD enabled, and I route the traffic to/from the Internet via iptables (NATting, of course). Everything works pretty good, except for the DNS-server assignment via DHCP: how can I configure dhcpd.conf to assign the SAME dns-server I receive from my provider on ETH0 to all my PC on ETH1?
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Jul 5, 2010
I don't know how configure or how explain what i want to do .... i have one server with dhcpd and dns name cache (also squid as a transparent proxy and iptables), this works fine but logs show this code...
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Mar 17, 2011
I have set up a nis slave server on Fedora 14. It was set up on a laptop so that the user can log in when he is at home (no NFS, local home dir). However, whenever the eth0 is disconnected, ypbind fails.
I have tried the same setup on a RHEL 4 (configured it as a slave server) against the same master nis as on the Fedora 14. Disabling eth0 on it however does not fail ypbind.
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Apr 21, 2011
how can i teste that my slave dns work better;knowing that my primary dns is in an other machine .i tried to dig the slave ;i have the response but when i halt my primary dns ,i couldn't dig the slave dns.
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Aug 3, 2010
having following problem in linux environment.I have a following basic file with name " BASEFILE", as shown example below :
sl.no pol.no name status loan
1 123 rama FORCE 500
2 234 jama LAPSE 800
[code]...
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Apr 11, 2011
I am studying RHEL myself, not clear with following topics How to configure DNS slave server in RHEL 5 Whether named.rfc1912.zones file entry can be included in named.conf itslef,if not What is following entry means inside named.conf file
zone "." in{
type hint;
file "root.servers";
[code]...
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Jul 31, 2010
I recently set up replication on a production server and some rows are not making it to the tables on the slave. After 3 days I can see 200+ entries (of 161,000~) that are on the master and not the slave. Logs under /var/log including mysqld.log, mysql.status, messages do not show any problem.I have already tried dropping the DB on the slave and setting up the replication again by doing a stop slave, set slave options such as were in the logging to start, drop table, restore the dump previously made by the master, start slave, but the issue persists.
I following the documentation on the MySQL site for setting up replication so I'm not sure why this is having issues.What can I do to investigate and fix this?
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Apr 19, 2010
OS :: Debian Lennyldap :: Openldap (newest one/get from apt-get)replication :: yes (on different machine)secure :: yes (tls)hi there i got problem on slave ldapwhat i am trying to do now is to have machine authenticate at slave ldapwhen master ldap die. So i stop slapd service at master ldap and try to authen. As a result of it, the prompt for login appears to fill in username but with the correct password couldn't make login successfully. I have checked at log file but there is any authen log of that login I wonder if it doesn't direct authen to slave ldap server. Here is my client config ::
#
# LDAP Defaults
#
[code]....
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Apr 12, 2010
I have a secondary slave dns server setup, it has transferred all the records from the primary master.But when I run a few checks from outside using tools on the net it says:Tried to fetch SOA record for domain, but DNS server ns2.domain.com returned error code Refused.I disabled iptables, and tried again, same result. So I think it is something in the named.conf file? I appreciate any extra set of eyes on it. Just feel like I'm so close!
key "rndckey" {
algorithm hmac-md5;
secret "mysecretkey";
[code]....
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