Last night I implimented a few changes to my blog. I added several new plugins that will make the site much more functional. Here is a list of the changes:
1. Share This – you will now notice a “share this” link in each post. This will allow you to more easily share any post on my blog with your favorite services, such as technorati, etc. There are many other services listed, and it makes the whole process much easier.
2. Blog Stats – I installed this plugin to get better information on the stats of my blog. I tried Google Analytics, but didn’t like the interface much. So I’m giving this a try to see if I can get better stats. I already have access to several other stat apps since I use cpanel on my hosting server, but I want to get some other information as well.
3. Gallery2 plugin – I added this so I can post about new pictures in my picture gallery on my main website. With this plugin, I can easily browse my albums and simply click an image to easily link to it and post a pic in my blog.
4. Random redirect – I added this just for fun, and made a post about it. Its a link that will take you to a random blog post on my site. Its toally for fun and I probably won’t use it much, but its still pretty cool. Stumbleupon type random post finder.
5. Search Everything – I haven’t enabled this one yet, but when I do, its going to be cool. It will let you search everything on my blog in one simple search box.
6. Twitter tools – I enabled this so that each time I make a blog post, Word Press makes a post to my twitter account. Again, not very useful, but totally for fun.
7. Updated today banner – I haven’t actually gotten this to work yet, but when it does work, its supposed to add a neat little banner to my blog saying its been updated today. I’m still working on this one.
Microsoft Active Directory:
My home network is built on Microsoft’s Active Directory. I use active directory to organize my user accounts (all two of them), my computer and group policies. With group policies I can set common variables for all my workstations, servers, etc. This way I don’t have to hand configure everything, its all automatic. Group Policies are a great way to manage your network workstations or servers. There are other solutions here, some people like to run Linux at home, and I’ll admit, I do too from time to time. I love linux, but there are still too many apps I use that require Windows. From time to time I demo some of the latest Linux distributions and try things out. I think its great, and if I had a 4th computer to run it on, I’d probably run a linux server or desktop as well. Some people like novell, some people like MAC, its up to you. This is just how I am doing thing. I have group policies set to add customization to my desktop mainly. Things like a browser title, automatic update settings, common software distribution, etc.
Domains, e-mail and more:
I guess I can’t go much further without explaining how I also do my domain names and websites. I’ll write more about this topic later on as a how to and what you should know for getting your own domain and website. But for now, I’ll keep it simple. I own several domain names which I use for various purposes. I have one domain that is for all my server equipment, like my hosting server that hosts my website and some other websites I host for people (for free unfortunately). These servers are in a data center and I simply “rent” the server from them on a month to month basis because its cheap and does what I want it to do. Plus they take care of maintenance and problems. Then I have a primary domain name I used to use for my hosting company’s website. The backend server domain ended with a .net and the primary domain is a .com. These extensions can be anything you like, but I stuck with a traditional format. Then I have a third domain for my personal website which is mainly for my family and my blog, etc. Here is where the bulk of my incoming and ougoing e-mail comes from, the other two domains are mainly for servers and a now closed hosting company. I do have some other domains, but don’t really used them yet. I’ll be expanding that later on as well.
So now you know I have a shared hosting server which hosts my websites and most functions of my domain names. Now when it comes to e-mail, you’d naturally assume this server also handled mail for my domains as well right? If you said yes, you’d be wrong. I’m using a service called Rollernet which is a mail forwarding service. Since my ISP restricts incoming traffic on port 25, it was necessary to setup SMTP on a non-custom port. However, this causes a problem because when someone on the internet sends me an e-mail, most mail servers only send mail on port 25. So if I’m running SMTP on a non-custom port, how do I get my mail? Here is how. Rollernet’s servers are listed as the MX records for my domains. This means, that when you send me an e-mail, its actually received on port 25 by rollernet. They take the mail, queue it, do some scans on it for viruses, spam etc, then they forward that mail to my home mail server on a custom SMTP port. Of course I have this port setup in my cable modem and firewall to allow it to be forwarded to my mail server which resided on my LAN. Now here is the complicated part. My home mail server received mail on a custom SMTP port and is received by NoSpamToday, which is my SMTP level SPAM filter. NoSpamToday (NST for short), filters for SPAM, viruses etc, and basically makes sure that the message is valid before it allows it in to my mailbox. Now NST is not a mail server, its just a SMTP server, so another component is needed here, thats where 602 Lan Suite (LS for short) comes in. NST received a message for me on a custom SMTP port. Once it makes sure that the message is valid, it then forwards that message to 602LS which receives the message on the standard SMTP Port 25. 602LS receives the message and performes a few checks of its own, like scanning it again for viruses, doing aother SPAM check and finally delivering it to my mailbox. 602LS also has a built in webmail server, so I can check my webmail from anywhere in the world. This is also where port forwarding comes in as the ports for webmail need to be setup to route to my home mail server from the outsite. Using my public DNS zone, I can add a record for webmail to my domain, so I can go to http://webamil.mydomain.com/mail and get to my web interface. This way I don’t have to use DynDNS or any of those services, since my public IP on my cable modem rarely changes. Now if it were to change, I’d have to manually update that in my DNS zone. So watch out for that if your using this scenario. I am aware of it and know what to do, so for me its not a big deal, but if your new to this, don’t set this up and wonder why it breaks 9 months later. Keep an eye on your public IP.
Lets now talk about outgoing mail. I don’t know if your like me, but I find myself in situations at work and abroad where I find that my company network or hotel network restricts SMTP servers to their own servers and won’t let you send mail using your own SMTP configuration. For example, at work I run a simple server monitor that sends alerts. But my company has a firewall in place that limits outgoing SMTP traffic on port 25. Now I bet your wondering where the SMTP component from IIS comes in to the picture from my previous post. Here it is. I am running IIS on my mail server but only the SMPT component. So I setup Microsoft’s SMTP service to listen on a custom port (different from my incoming SMTP port for normal e-mail from Rollernet). This way, I can setup my monitoring server to use my custom SMTP server at home to send the alerts. So in my situation, my monitor program detects a problem with a server in my office, it sends an alert to my home mail server on a custom SMTP port. My SMTP server then relays that message to my shared hosting server which then sends it to the desired recipient on a standard SMTP port. This way, I can use SMTP wherever I am, still get my messages or alerts sent and accomplish my tasks. This custom SMTP service is protected by a username and password and relaying with it is denied. Relaying on NST is also forbidden. Ok, so how about my home PC? Ok, simple, we use outlook on our home PC, so outlook is setup to send/receive mail from 602LS through POP3 and standard SMTP. We send a message from outlook, it is received by my home mail server on port 25, which then forwards that mail to my shared hosting server. Some ISPs also restrict outgoing SMTP traffic, so here you may need to setup a custom port on your public SMTP server and configure your mail server to send all outgoing mail over a “SmartHost” or custom SMTP configuration. My shared hosting server then delivers the mail over standard SMTP to the recipient’s mail server.
So in summary, yes this is a complicated setup, and no it may not be for everyone. But I will say this, there is a degree of pride that goes into setting soemthing like this up. Now I’m a Microsoft Engineer, so I’ve been doing networking for a long time. No this is not the way to go about setting up a business or large company. Obviously I’d recommend using Exchange or more powerful mail servers and betters ISP connections. But if your a techie and want to setup a really cool home network, this guide might just help point you in the right direction.
Lets talk remote access. So how do I manage this home network when I’m not home. Easy, RDP. There are lots of people around that don’t like RDP, its not very secure, and has its issues like any other software or technology. For me however, its perfect. I simply forward port 3389 from my cable modem to my firewall and from my firewall to my PC, I can remotely manage any machine on my home network. Now I took it a step further, and actually setup a custom RDP port on my other machines, like my servers and second desktop. This has the advantage of being easy to individually RDP into any machine on my home network without first having to remote into my home pc and then into another machine. In conjunction with DNS for easy naming, its a snap. All you need to remember is the custom port number for each machine. I only have a few so its no big deal, if you have many machines I’d recommend finding a better way, such as VPN. Through RDP I can remote control, and virtually manage any server or desktop on my home network.
Web management: I also use a program called Remotely Anywhere (www.remotelyanywhere.com). Its a great application that runs as a service on Windows. With it, you can remote control, Transfer files, totally manage all aspects of the machine right from a web browser. Its very robust and powerful, with tons of additional features too numberous to mention. Its one of the best web based remote control/management solutions I know of. This can also be setup on a custom port, so it will need port forwarding configured for it as well.
FTP: I used to have a NAS server with FTP setup so I could FTP directly to my RAID5 storage device. Now that its gone, I don’t really use FTP anymore so I removed it. I use an FTP site on my shared hosting server temporarily if I ever need to send anything through FTP. I can grab it from home later.
Internet Access: Because my cable modem and firewall do NAT, its very easy to provide for internet access to my workstations and servers on my home network. The firewall is the gateway on my network, and Microsof’t DNS handles all DNS related operations on my network. My DNS server is configured to forward all requests for external host names to my ISP’s DNS server. It then caches the results and can reply much faster to any requests my workstations or servers make. Internet access is basically a simple NAT solution provided by my firewall and cable modem.
Points of Failure:
With a system like this there are other considerations that need to be taken into account. Amoung them are power, redundancy, damage, replacement, etc. For example, if my power goes out what happens. Well for me I have my critical equipment on a UPS. Since this is a home network and not a critical system, the UPS will keep my servers and internet connection up and running for 5 minutes. This should be sufficient as long as the power isn’t out for long, which is isn’t usually. What if my firewall or cable modem goes bad. Well then I have a problem, as with my ISP I have to have them come and activate a new cable modem. So I’d first have to buy a replacement and then have them install it. This can be done usually by the next day. So what if my mail server or other network equipment is damaged. Well, for mail, if my home mail server becomes unavailable, mail will queue at rollernet, so I won’t loose any e-mail. I can even redirect that mail to my shared hosting server if I wanted to so I could get to it. If some of my network gear fails, it will obviously need to be replaced. I’d try to repalce it with exactly the same modem so that if it had a configuration with it, I could easily restore a backup config file to immediately get my network back up and running.
Security: What about security, how secure is this setup? Very secure. Even considering I have ports forwarded into my LAN from the outside. This often makes security experts very nervous and for good reason, but again, this is not the NSA, I don’t have anything on my home network worth anything to anyone but me. That is not an excuse for having bad security. First, I have a double NAT solution, so even if someone could hack in past my cable modem, they couldn’t get further than my firewall. If they could get past my firewall by some miracle, they would not be able to access anything on my network, since all network traffic between workstations and server is encrypted through Kerberos. The worst they could do if map out my network and find my IP addresses. DOS attacks are also a possability, but there isn’t much that can be done about that anyway. Again, I’m not saying good security isn’t important, and the measures I’ve taken are sufficient for my needs. Please don’t think I’m advocating bad security measures.
Thanks for taking time to read this post, I know it was long. Keep an eye out for more tech posts in the near future. I’ll also post some images giving you a visual of how all this works. Here is a simple visual aid of what I’m talking about above.]]>
After about 9 years of being in IT, I’ve learned how important backups are. I’ve experienced data loss due to not having a good backup several times. It really is worth it to have a good backup plan. Whether at work or at home. At home, I’ve got two 2003 servers, two XP desktops and I always make sure I at least make a ghost image of each one, with just the bare OS and again with all the software I need loaded. For example, my home PC, last night I was having troubles due to some beta software I installed (foolishly). I had planned to use my other XP desktop for software testing, but never seem to do that. The junk always goes on my primary PC, after all its faster and resist crashing longer than the slower desktop. So anyway, long story short, I decide to restore a ghost image of my Home PC with all the software loaded on it. Since I have a domain, my user accounts are still OK, I keep all my data on separate drives and network locations, so I won’t loose anything. But there always seems to be something you forget. Items like desktop downloads, favorites, RSS feeds, etc. now I couldn’t get windows explorer to work long enough to copy anything, so I got out my trusty Knoppix 3.9 bootable CD, inserted my thumb drive, and off I went, I was able to use Linux to get my data off my drive, before I reloaded the ghost image. I finally around 11pm, got all the stuff copied over and my ghost image restored. All I had to do was setup our desktop profiles again, like setting up outlook, and redirecting the my documents folder. Then I was done. So I’m all back up and running, thanks to having a good backup strategy. It only took 4 minutes to restore the ghost image, if I had to reinstall windows and all my apps manually, it would have taken hours! I use NTBACKUP to backup my two servers. The other desktop I don’t care about and will likely give away soon anyway.
Once I lost 2 years of data on a Novell Netware server I had at home. I decided I’d break a mirrored volume in Netware, forgetting I had stuff on it. Once it was broken, my data was gone. Boo hoo hoo. I was recently using a Dell PowerVault NAS 705N for my storage needs, but its a little slow, it was RAID5 which was good, but I decided to sell it, so now its listed on eBay. I hope I can sell it and get another 400GB hard drive. I have about 1TB of storage space in my PC right now. I need it too, I’ve got 200GB of normal data, like CD images, software, downloads, documents, etc. Then I have lost of multimedia, like music, movies, home video recordings and such that take up a lot of space. So I need to get one more drive and that should do it for now. My only concern now is that if any one of these drives fail, I loose all my data, and I don’t have a location on my network with storage large enough to store all that data if I were to back it up. I thought about getting a tape drive, but don’t want to spend the money (that I don’t have) on a tape backup solution which would likely not be large enough to hold all my stuff on a single tape anyway.
1. Changed MX records for my two main public domain names to route mail only to my mail redirection service’s mail servers.
2. Installed noSPAMtoday on sisko and configured to listen on my custom port (the port the SMTP redirection service uses to send mail to my home mail server).
3. Changed 602 LAN Suite to listen for SMTP on port 25.
4. Configure noSPAMtoday to send good mail to 602LS on port 25. So it now acts as a true SPAM Proxy.
Using this new configuration, I’m no longer accepting mail directly on my shared hosting server. Mail now gets routed to my SMTP redirection service. Mail gets queued on their servers and then sent directly to my home mail server (Sisko) on a custom SMTP port. NoSPAMToday is installed on Sisko listening on that custom SMTP port which if forwarded into my LAN from my firewall. NoSPAMToday does RBL checks, basyian checks, and various other checks for SPAM Messages. Right now I have it set to reject/deliver, so it still sends a bounce message to the SPAM sender, but goes ahead and delivers the message to me anyway. I’m going to leave it setup like this for a week or to in order to ensure that I have everyone I receive mail from either on my whitelist, or ensure NoSPAMtoday does not mark them as SPAM. Once I’m happy with the results, I’ll switch modes to reject/delete so I won’t even see messages it considers SPAM anymore. I’ll only receive valid wanted email.
Once a message is validated by NoSPAMtoday, it then gets sent through normal SMTP on port 25 to sisko on the internal LAN. 602 LAN Suite then accepts the mail and delivers to the appropriate mailbox. Right now it accepts mail for my two main E-mail addresses, and for Liz. The free version of NoSPAMToday is free for non-commercial use for up to 10 E-mail addresses.
Once 602 LS has my mail, I can download them with POP3 or use its built in webmail application. I usually stick with POP3 since my company uses fatpipe technology which causes a problem with my originating IP address, making webmail inaccessible since my public IP address changes at any given time. 602 LS is configured on its own internal domain and has a default masquerade domain of my main public domain name. User accounts in 602 LS are standalone user accounts, and are not physically related to my public domains. When we send mail, the identity information in our outlook profiles handles the E-mail addressing and name information. 602 LS is then configured to send mail out using my shared hosting server, but can be configured to send directly to the recipient mail server should the hosting server go down. My SMTP redirection service has two physical servers on different subnets served by multiple ISPs, so its unlikely that I’ll ever loose any E-mail. Even if sisko goes down, mail will spool at my redirection service.
Pretty cool stuff! Maybe overkill for a 2-3 user home network??
Q1. Can you install Exchange 2003 into an Exchange 5.5 Site?
A1. Yes you can, this is actually the preferred method of migration since you can use the “move mailbox” in Exchange Administration to move mailboxes between Exchange servers in the same Exchange Organization. You will need the ADC to make this happen.
Q2. Can distribution lists in Exchange 5.5 be migrated to Exchange 2003?
A2. Yes they can, using the ADC the groups can be imported as distribution groups in 2003/AD
Q3. What gets complicated by installing 2003 in a separate Exchange organization, rather than installing Exchange 2003 into the Exchange 5.5 organization?
A3. If Exchange servers are within the same organization then mailboxes can be
moved easily through ‘Exchange Tasks’ in AD USers and Computers. They also
maintain the same alias’ (very important when users start replying to old
emails, they will be bounced if the mailbox and alias changes) and users
outlook profiles will also be automatically redirected to the new server as
it is within the same organization. In separate organizations, none of the above is true. As far as I know
exmerge is required to migrate mailboxes, you’ll have to create completely
new mailboxes on the new server and reconfigure users outlook profiles at the
desktop. Mailbox alias’ will also likely be an issue.
Ok, I know this is nothing to the average guy, but to me, a tekkie, this is cool. I’ve finally setup my home network the way I want it (See previous post about home network). So now I just got SMTP redirection setup so I can use my home mail server to receive incoming SMTP mail. I’ve got a few public domains, which I now have 3 MX records for, one for my hosting server, and two for rollernet.us which I use for SMTP port redirection. Since my ISP (Road Runner) blocks incoming port 25, I have rollernet.us redirect port 25 to my home server on a different port. Allowing me to have redundant MX records in case of an emergency. The main hosting server will do the bulk of the mail operations, the others are just for backup. I’m still looking for a decent secondary DNS service to use. I’m using 602 Lansuite as my mail server, since they have a free 5 user version that is very robust and easy to use. It gives me webmail, web based admin, external pop3 mail downloading and assignment to any internal mailbox, plus all kinds of other features. My next trick is going to be working on getting VPN to work. I want to be able to VPN into my home network. However, my cable modem is somewhat inadequate and has not yet let me accomplish this goal.