I'm heartened that others are reading the post and hope that it leads to further sharing of information and experiences. I'll do my best to help but please understand that I'm not an expert. If you get completely stumped, I'd suggest seeking help from the people who created the package you installed as they typically have a forum of their own. So with that out of the way....
friji, accessing your DS from the internet is usually quite straight forward but you do need to get your ducks in a row. For the sake of the exercise, I'll go through the whole process so that it doesn't really matter where your starting point is.
1/ Configure your DS with a static IP. The reason for this is that you don't want your DHCP server (usually your broadband router) to assign a different IP address every time you restart your router or your DS, otherwise when a message comes in from the internet to port 9200, your router won't know what IP address to forward it to. Go to Control Panel > Network > Network Interface and check <Use Manual Configuration>. You'll then need to set a static IP address. I've got mine set to 192.168.1.5 with a subnet of 255.255.255.0 and Disable Jumbo Frame mtu 1500. You do need to be sure that your router does not assign that IP to any other device on your network. Check your router setup and typically it will have a starting and finishing IP range that the DHCP server will be allowed to use. Mine uses 192.168.1.50 to 192.168.1.100 so I can use any IP address other than those as long as it starts with 192.168.1 and isn't already used by another device on my network, and must be ultimately be between 192.168.1.0 and 192.168.1.255. Your router is usually 192.168.1.1. If your network uses 192.168.0.xxx then of course you need to be consistent with that.
2/ Configure your router to port forward the ports that are relevant. For a full list of ports used by the Synology DSM, look here: http://www.synology.com/support/faq_show.php?q_id=299
. For SABnzbd+ from Mertymade, port 9200 is used (for non SSL) so to access from outside your LAN, ie. the internet, your router needs to forward messages for port 9200 to your DS on port 9200. If your router is in the supported router list, that should be really easy by going to Control Panel > Router Configuration and adding the entry. If your router isn't supported, then you need to log in to your router's configuration interface and do it manually. Still not difficult. Most routers will use 192.168.1.1 as their default IP address so simply type that into your browser address bar and you should be presented with your routers login screen. Find the port fowarding config page and make the necessary entries.
3/ If your ISP gives you a dynamic IP address, then subscribe to a DDNS (dynamic DNS) service like the free www.no-ip.com
. This is so that if your ISP assigns a new public IP address to your router, your DS advises the DDNS service of the change and all you have to remember is your no-ip domain, eg. mysabnzbd.no-ip.org. For example, when you go to www.google.com
, the DNS servers know what the IP address is so you don't need to. Humans work better in plain english. Note in my example mysabnzbd.no-ip.org, that the text "mysabnzbd" needs to unique so don't expect to all be able to use that. When you set up the DDNS Host/Redirect, I use Host Type: Host DNS (A) and leave everything else at the default settings. Using my example, now when I'm outside my network and type into my browser address bar http://mysabnzbd.no-ip.org:9200
, I get a login screen to the SABnzbd+ interface. If I'm inside my network I would use my local IP, eg. 192.168.1.5:9200. This is because most routers don't support something called loopback. Never mind the details, just know that you need to use the local IP inside your network and your no-ip address from outside.
4/ Configure your DDNS setup on your DS. In DSM 3.2 go to Control Panel > DDNS or in DSM4.0 go to Control Panel ezCloud. Note that the details you enter into the DS for this is your account details for the DDNS service so that your DS has the privileges necessary to advise the DDNS service of a change in your IP address.
5/ At this point you should be able to login to SABnzbd+ on your DS from the internet using a browser and entering http://mysabnzbd.no-ip.org:9200
(It wasn't necessary for me to add /sabnzbd like inkaman to the end of that address). An important note though is that your ability to login will depend on whether or not your company blocks the ports you want to use. Plenty of people have reported issues with their companies blocking ports so if you can login while at home but not remotely, try a different location like a friends place which would be less likely to have ports blocked. You can just as easily use your smartphone to browse to your DS SABnzbd interface.
I haven't tried couch potato or sickbeard so can't offer any help with that at this time.
Hope this helps. If you find that I've missed something or there is an error, please let me know and I'll edit accordingly.