Server :: NTP Config - Prevent Clients Using Server?
May 24, 2010
I'm presently writing software to keep my system time from drifting, it uses an external clock device.To verify it's accuracy I'm running ntpd as a server, and have another server monior the first as a client. This allows me to compare the offset with other 'valid' time servers.The problem is that the monitoring client keeps synchronising with my development server. How can I configure either the dev. server or the client so that it's time won't be selected as a good time source?The ntp.conf on the dev. server looks like:
Code:
server 127.127.1.0 # local clock
fudge 127.127.1.0 stratum 10
I have tftp-server running on Centos 5. Clients which are on the same subnet as the server are able to get and put without problems. I have a client that is across the internet that is having trouble getting files from my tftp server. A tcpdump reveals that the client is requesting the same file over and over again. In /var/log/messages, I am see the following error repeated over and over until the client finally gives up.
localhost in.tftpd[12727]: tftpd: read: No route to host
i want to configure an Open LDAP server in Ubuntu....and also want it to connect to its clients, i have two machines for testing,one for client & one for server, i followed the tutorials on ubuntu documentation,but did not succeed in making either the client or the server,
I just installed SLES 11.2 X86_64 and have SMB Server started after adding 2 lines to smb.conf:1. NTMLv2 = Yes2. name resolve order = wins bcast host lmhostsThere are also 02 new DWORD lines I add to Win7 clientsHKEY_LOCAL_MACHINESystemCurrentControlSetServicesLanManWorkstationParameters 1.DomainCompatibilityMode = 12. DNSNameResolutionRequired = 0Of course a few number of modifications I made from Yast to enable SMB Server and Client, and bcast as well. Now I am able to join my Linux Domain without error at first reboot from win7, but it seems spending a long time about 30 secs for auth. even I test on a very fast network system, all with core quad 3GHZ CPU and 4GB DDR2I would like to mention here that before I made the above changes I did a lot of different modifications onto my win7 clients (I found many suggestions online), and all seems mess up and never work; Then I had to reinstall win7 from scratch and just add 02 lines as above, but it works.
I am trying to set up an X2go server, that lets clients log in on a remote server. the idea is that a school uses old computers as thin clients, and a small server loads an image onto the clients, and then lets them log into a big server in germany using X2go. Does anyone know where i can find a guide or some documentation that would show me how to do
In my network the client systems access internet through my server which has ubuntu 9.10 server edition in it.I gave my server's ip address as name server's address in /etc/resolv.conf file in the client systems. And i have assigned static ip to my systems. i have not configured squid in my server.I just want to know whether the website acessed by the client systems will be registered in the server or not, with the coresponding ip addresses.
i have checked system log file in server,but i can't find any ip address entry of the client systems in it.which file i have to actually check, or should i need to configure any extra things to monitor the clients web history in server.
I wanted to know is there any way to prevent fork bomb on a server or understand who did it and how did it I mean how to track reference of fork bomb and find out how does it occur ?
config my apache server to list all my files: c/c++, php, java files, like the txt file on my server, e.g /var/www/mydomain/pub i want to dump all my c/c++, php, java file under the pub directory and I can access it from my domain name, if I dump txt file, I have no problem to view it, but when I dump c/c++ or php files under pub directory, then I can't view it like regular txt file, Q: is there anyway I can configure my apache server to view all the c/C++, php, java file as like txt file?
I would like to setup 2 linux machine each with two ethernet cards, and need to connect to two subnet e.g. 192.168.*.* and 10.0.*.* . If one linux machine out of order, the other will take over all the services(1 httpd and two named(192.168.*.1 and 10.0.0.1 as server ip). What network config is best and easy to failover to other machine?
I installed a server called Oracle VM Manager, which is actually a web based application to manage Oracle VM server.After successfully installed everything, it suppose to be access by browser using But strange thing is, I can see web pages from the server itself with but any other machines to access it with hostname or ip address all failed.
it may be a simple doubt i have but i really want to know this,in the httpd.conf file under the server root of apache server.they have instructed not to add a slash at the end when mentioning or giving the path for server root.I think both will still remain the same, then y is that mentioned that way?
when installing mysql-server by this command sudo apt-get install mysql-server. Installaton is complete but i cant get a my.cnf file. Can anyone tell, what is the mistake i did and how to overcome from this error. Here, i am posting the results
I have a Bind DNS caching-only server setup that is working. I am bringing up a new AD domain controller that will also be a DNS server for that AD but I don't want it responding to any DNS queries except those that are AD related.So, my goal is to leave this caching server as the primary DNS server for stations on the network and have it forward requests for the AD domain to the domain controller.My understanding is that I just need a forward zone for that domain pointing to the domain controller. However it does not seem to be working.So that leaves me to think that my caching server is not forwarding properly.
For example, this AD is going to have a naming convention of hostname.mydomain.local.If I do an nslookup and specify the domain controller's IP address as the server, I can query addresses that exist in DNS on that server, such as dc1.mydomain.local.However, queries to my caching server times out (I get a response from the caching server if I query mydomain.local but none of the objects in that domain) Here is my named.conf file:
I'm a NOOB setting up Postfix but managed quite well by following the Ubuntu Server guide. I have managed to set it up using SSL but testing a mail client like thunderbird I can also connect to port 25 using no authentication. Connecting using SSL on port 465 by editing "master.cf" file works but 25 i still open.
1. How do I prevent clients to connect to port 25 without authentication? 2. I guess I have to have port 25 open in order to receive mail from the outside world?
Im having a problem with our pxe environment. We have around 200 clients per server to boot from tftp and when we hit 250 the service just freezes. So, our options are to either add more servers or move to a more robust protocol. Is this feasible?? How can clients boot from ftp?
The Server in the above diagram can be accessed by Client3 and Client4 but not at all by Client1 or Client2. Router0 specifies the Server as a DMZ Host. I would be more specific but this is not my server. I don't use a DMZ, I forward ports when they are needed. In this case I represent ISP1 and the server belongs to a befuddled client. Client1 & Client2 can send packets to each other, no problem. Could the DMZ be breaking communication between the Server and Clients 1 & 2?
I work for a church, with office staff of about 10 people.
We want to set-up a server to store all the office information, (which is now scattered all over the place).
The idea is to give individuals a partition on the server(password protected). There is database software that needs to be accessed by 5 people( it runs on MS Access). Most of the document are MS Word. Of course you can tell me of a better way to do this than my idea.
how to set-up this network. I have to submit my info to church leadership. it will save us buy Window Server and 10 CAL (that ZAR 10k).
I have 2 servers that act as ntp servers, both in cluster. i've configured to each client 2 servers and only one of the servers doing me an hard time, the other works perfectly. here's some output from the client:
Code:
[root@host1 ~]# ntpq -p remote refid st t when poll reach delay offset jitter ============================================================================== ntp1 .INIT. 16 u - 1024 0 0.000 0.000 0.000 *ntp2 LOCAL(0) 10 u 227 256 377 0.157 2.459 0.813
At my work, we have several clients (outside clients) that have an FTP login to our FTP Server. Their login then leads them to their home FTP folder. The FTP server is currently a Win2003 box. Because we have so many clients, we would like to implement some form of WebGui that would allow each client to manage their own FTP home folder and user info, such as resetting their password if they lost it.
Is there anything like this available in linux that would provide us with that kind of control/usability?
I have a server (called NAS) that shares out /public, and I also have this same server running KVM with some VM's. I am setting up the first VM now, and one of the things it does is download torrents onto the share. I am connecting it via "mount -t smbfs //nas/public /mnt/nas" from the VM on the host and it seems to work fine. However whenever I add a torrent to the queue on the VM to download, all downloads stop and seem to be disconnected. I can restart them after a few seconds, but they will stop after a few minutes with another disconnect error. I have the network interface bridged, so I thought it was talking directly to the host.
