Networking :: Setup Multiple FTP Servers With Distinct Data Sets With 1 Master FTP Server?
Aug 27, 2009
Faced with disk-bound issues on a FTP server with high traffic. Would like to set up multiple FTP server nodes with dedicated storage for each node where all FTP access is managed by a master FTP server. So, a user would FTP to a single externally visible IP address for the master FTP server and then get routed to the appropriate FTP node. Are the mutiple FTP nodes required or is there a better way of doing this? Perhaps only one FTP server is required and then each node would serve as a separate file server
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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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Dec 26, 2009
If I need to append a set (or sets) of data to a file(or files) on remote hosts what is the best mechanism by which to do that? My first thought was ssh but the command syntax to append to a remote file isn't clear to me. Can anyone point me in the right direction here?
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Jul 4, 2010
Im moving all my websites on a dedicated box. I had a cpanel hosting account, and now moving to a terminal and ssh system.I need some advice on choosing my mail setup. I need POP, SMTP, with multiple domains, as host for a few clients.I would like the most simple version.The server will only send +- 100 mails / day.I currently running Ubuntu Linux 10.04.
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Oct 10, 2010
I have recently setup an Ubuntu 10.04 Minimal x64 Server. I plan on setting it up as a mail server. I need a secure server, that has spam prevention on it. Im setting up around 50 domains and would like a web based control panel. What is the most secure mail server, that i can setup for multiple domains?
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Apr 15, 2009
So I have a pretty big networking nightmare on my hands right now. Stepped into the dog crap with this one, told my employer that I knew how to setup vmware servers right? Its not hard, install CentOS, install vmware, run the config tool, bridge the network, down the road we all go right? We have 3 servers running about 10 virtual servers.
Here is what we have all together.
CFU <- This is the internet. We have IP ranges xx.18.230 - xx.18.241 Gateway is xx.18.254 and subnet is xx.255.128
DELL PowerConnect 3348 Switch <- This is what everything is pretty much jammed into.
VMH1 <- This machine has 2 NICs
eth0 connects to the DELL switch somewhere on the upper 30+ ports
eth1 connects to the DELL switch on port 1.
It uses firestarter and is the gateway for our internal internet on 192.168.11.XX using IP 11.254. It has 4 vm's on it. One of them is the domain controller, hooked to eth1 using IP xx.11.1. The other one is a server for managing remote backups, it has an external IP linked to eth0 of xx.18.234. The other 2 vm's are for misc remote login stations that use internal ip addresses linked to eth1. It hasn't had a single problem communicating on either one of the ports..
VMH2 <- This server hosts a web server, and some other misc stations.
It hosts a web server on xx.18.230 and xx.18.231
It also hosts 2 workstations on a seperate network, through another router that is wireless....
Now, we have the problem child, VMH3
VMH3 <- This hosts...nothing. It sits and has a ton of storage, but does absolutely nothing, but won't communicate out either one of its network ports.
The xx.36.xx and xx.22.xx networks are there because we have multiple businesses in the building that shouldn't see each other.
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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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Mar 15, 2010
This is the current setup that we have: We have approx 20 clients who pay us to send out a type of e-mail called an E-Blast to their customers. We currently are using 5 Microsoft Windows Virtual Servers to do this. The problem is that those machines are starting to break down. There are times that it will take Microsoft Windows approx 9-10 hours to complete 1 job. This is way too long. We want to move away from Microsoft Windows for this particular type of job as it seems there are more customers who are wanting to use this type of advertising.
It seems that using a Linux Server "Command Line or Shell" environment would be the best way to go as there is no GUI like Windows. Since there is just text...that is something that would/should process very, very quickly.
I am in the process of setting up a new SMTP outbound mail server. This is the current software & configuration (what is installed on this new machine):
All of the customer data (Names, E-Mail Addresses, etc that these e-mails are going to) are currently loaded in a Microsoft SQL Database.
My machine that I am using is plugged into the DMZ. I have 1 ip address for the 1 network card. I have also added/bound 4 more ip addresses to that network card.
I have configured Postfix for Multiple IP Addresses.
I can, from the command line, send successful test e-mails and receive them in my personal account.
As far as I know everything is setup correctly. I can and will post requested information so that it can be verified that everything is setup correctly.
Here are a couple of my questions:
Ensure that I have my Network / Interfaces file and my Postfix's Master.cf/Main.cf files setup correctly?
How can I setup this server to be an Outbound SMTP server and get it to use all 5 of the IP Addresses to send these e-mails quickly?
What can I use to check and ensure that this server is in fact sending out emails on all 5 IP
Addresses (I heard that there is a program named "Postal" that may help in determing this).
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Feb 3, 2010
I'm looking to setup a home server for the purpose of backing up and storing the files on our multiple (Windows) computers. What kind of server should I set up? Samba? Lamp?
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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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Jun 10, 2010
I got two issues with my wifi usb adapter:
1) it cannot see any networks around
2) i cannot setup it in master mode to use my PC as a router
As far as i can see, the device is recognized and the correct driver (rt73usb) is loaded. I was able to connect to a laptop somehow (the laptop could see other networks and the adapter's PC-to-PC network). I'd like to make it work as a router, i.e. share my internet connection (eth0) via wlan0. Here is what i have:
Code:
Ubuntu 10.04
Linux 2.6.32-22-generic #36-Ubuntu SMP Thu Jun 3 19:31:57 UTC 2010 x86_64 GNU/Linux
TP-Link TL-WN321G wifi usb adapter as seen as
Bus 001 Device 006: ID 148f:2573 Ralink Technology, Corp. RT2501USB Wireless Adapter
$ iwconfig wlan0
wlan0 IEEE 802.11bg ESSID:off/any
[Code]....
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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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Feb 4, 2010
Im trying to setup multiple domU through the default bridge setup. I am able to access only one of them through the network at a time. If you ping one of the domU it works perfectly but you cannot ping any of the others until you stop pinging the one and even then it takes a bit before you can. Ive looked around for a while and seen similar problems but nothing ever seems quite the same. Im probably missing something really stupid. Or is this the way the bridge is supposed to behave? Do i need to use a routed virtual network?
[Code]....
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Jun 5, 2010
I have a large collection of pictures (12GB and growing) - way too big to fit on one CD or DVD.I want to back them up to CDs or DVD's in standard (I think it's iso 9660) format that Windows can read.I know how to do this the hard way - by manually selecting a pile of pictures that will fit on one disc, burning it and then going on to the next pile.There must be a way to tell k3b or a similar program to do this for me - to automatically make a backup of the whole thing using as many discs as necessary.Can anyone tell me how to do this?
I don't want to use tar or another archive/compression scheme because I want the pictures accessible to someone with minimal technical expertise who doesn't even know how to spell "Linux".
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Jan 24, 2011
What ubuntu server setup will work the best on a non web mostly data based via sockets (mysql php phpadmin) will be the easiest to use and what sockets to use? Lamp?
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Feb 7, 2011
I'm looking at setting up a couple automated systems: Here are a few examples:
* Internal accounting system to download and process emails
* Public web server to visit
I could put each system on its own separate box -- for example, it's generally good practice to separate anything that external users have access to (such as a webserver) from internal processes such as accounting. Now, rather than dishing out the money for two separate servers, could I get away with just installing new instances of VMWare on the same box for each system?
To give you an idea, these are not large scale computationally sensitive systems. The accounting one is simply downloading and tallying emails, and the latter is just a webserver with maybe 5 hits per day on a good day. I could definitely pick up a new box for say $50, but I wanted to know the general practice of using VMWare on the same box versus two separate boxes.
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Jun 12, 2010
I now have 2 desktops running debian. I have virtual servers running in desktop 1, and I am hosting my photos using Gallery2. I have copied Gallery2 and the mysql over to desktop 2. I have entered port forward to desktop 1 using port 80 (using my router), and desktop 2 using port 1000. I can only access Gallery2 in desktop1. If I tried to access Gallery2 in desktop 2, I got re-directed to desktop1.
Questions:
1. Are home routers capable of port forward to more than one computers in a home network behind the firewall of the router? It is Belkin N+ router.
2. Can multiple virtual servers be setup in 2 desktops?
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Oct 24, 2010
I have set up a master DNS server at 192.168.50.9 and a slave DNS at 192.168.50.6. Both servers are BIND9.Machines are for testing/experimenting, hence the IP addresses. Initially, the zone transfer was blocked by the firewall on the master, as the slave uses randomly selected non-privileged ports for zone-transfer query. So, as far as I understand, there are two possible approaches:
1. Allow connections based on source, which should be
Code:
-A RH-Firewall-1-INPUT -p tcp -m state --state NEW,ESTABLISHED -s 192.168.50.6 --sport 1024:65535 --dport 53 -j ACCEPT
(and it works for me fine)
2. Allow ESTABLISHED and RELATED connections, which would be something like
Code:
-A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
which was my initial idea but didn't work, but has inspired me to dig deeper into firewall configuration topics :).
Question: Does zone change notification message count for opening a dialog, or notification from master and slave zone update request are two absolutely separate actions? If the latter is true, that, of course, explains why option #2 didn't work.
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Apr 1, 2011
I'm curious if anybody can shed some light for me in this department. We're in a large environment with a Windows DHCP Server. We have been tinkering with LTSP on Edubuntu as thin and fat clients. It works great, but right now we just have 1 server handling the lab, which works fine unless we want to expand, which may be very possible.
These are the instructions I received:
Login to your windows server and load the DHCP configuration screen
Create a DHCP reservation for the MAC address you obtained
Add the configuration options below to enable the machine to boot from the LTSP server
017 Root Path: /opt/ltsp/i386
066 Boot Server Host Name: <ip address>
067 Bootfile Name: ltsp/arch/pxelinux.0 # Specify CPU architecture in place of 'arch', for instance 'i386'
From: [url]
I'm curious, what if I want to have multiple Ubuntu servers on the network that I want to have bootable? For example, let's say I have 3 labs, and 3 servers. Server A to Lab A, Server B to Lab B, and Server C to Lab C. I want all C's computers to boot to C, and B to B, A to A, etc.
1 - How would I add multiple entries on the Windows DHCP Server to allow all 3 (A B C) servers to boot?
2 - How would I be able to isolate the clients so ONLY Lab A clients boot to Server A, etc?
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Mar 9, 2010
I am looking for a solution where the data to be shared across multiple locations through login. In this regard, the following options are required.
1) The files/folders created can be viewed by the group and the owner has an option to edit and delete. However, if required the owner/admin can grant permission temporarily.
2) log of files/folders being accessed
3) The access of files/folders is based on username and password.
One thing striking me is FTP Server to enable the above solution. If so, i just want a step by step guide. Otherwise, let me know any other better options.
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Jan 21, 2010
I just tried out setting a master password for Firefox saved passwords and compared the old and new (before and after setting the master password) signons.sqlite files. Although passwords were not stored in plain text in either of the files, I did notice that the files were exactly the same. Am I wrong in assuming that setting the master password did not encrypt anything at all, or am I simply looking at the wrong file?
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Jan 17, 2011
I want to know How to set up Subversion server to run Multiple Projects? I want something to manage it over the web or manage it over kloxo as I am currently using control panel kloxo.
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Mar 17, 2011
I am researching the CentOS Cluster Setup. Does anyone know of a guide on this or have a thread linked that I can look at? I want to build a small cluster and then be able to add to it as it grows. Mainly I want to have web hosts, data, and mail behind it. The DNS will probably be on there own.
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Jan 7, 2010
Running CentOS 5.4 x64. Have successfully bridged eth2 with br2 by following the instructions here: [URL]../Networking (under the RHEL section) Have been running several KVM VMs successfully via this bridge.
I am now trying to bridge additional interfaces by using the same routine. Each bridge is named to correspond with the ethX device its bridged with.
Example of ifcfg-eth0 script:
DEVICE=eth0
HWADDR=00:16:76:D6:C9:45
ONBOOT=yes
BRIDGE=br0
[Code]...
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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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Nov 27, 2008
We have a new Bussiness DSL line with 16 public addresses.What we want is to setup a DMZ to run some services and internet to the LAN. Here's a schematic of what we want:
Code:
Backup Internet Main Internet
connection connection
| |
| |
SDSL Modem BDSL Modem
[code]....
The webserver has the following settings:
IP: 12.34.56.125
subnet: 255.255.255.240
gateway: 12.34.56.126
What IPTABLES rules do i need to setup to "see" all IP's in the DMZ-2 from the internet?
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Apr 13, 2011
I'm trying to pass multiple dpmains thru one ubuntu server to various hosts on my local network.
[url] should be sent to the /var/www folder on the local host.
[url] should be forwarded to an IIS box on my local network (owa.nunya.local)
[url] should be sent to another ubunto box on my local network (smtp.biznet.net)
I have tried placing VirtualHost entries in /etc/apache2/sites-available/default and [url]and [url] both work but [url] gets forwarded to the c:inetpub folder on the IIS box.
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Jun 28, 2011
I am currently working on managing multiple linux servers in remote locations, servers particularly user for web hosting. I need to backup data to a backup server but rsync which i currently using doesnt helps is there any tool to backup every server with out modifying it bcos there are hundreds of servers so installing a tool in every server is time consuming process.
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Jan 26, 2010
by now I have 10 servers for hpc, power computing oriented. My users need to launch several processes using qmake. The users are used to work with ubuntu 9.10, and the software from the repositories is switable for them. I've deployed ubuntu 9.10 to all 10 servers (pxe rocks). By now we work with parallel-ssh and cluster-ssh, which allows as to launch the same process to all servers. With this tools this tools the servers remain as independent but with the same software and the same launched command. Now we would like to go to next step and see all the servers as a single one with all the resources from the other 9 as if was its resources. The difference would be substantial in time to process and also time to design the command to launch.
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Nov 24, 2010
After installation Ubuntu Server 10.10 I don't know what to do next to access to the Internet.
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