can connect to swann system from home but not from away from the house???

There are several considerations regarding your setup - some of which are dependant upon the features provided by your router but I will try to put the issue into perspective.
Your router provides a link between the Internet (outside World) and your local area network (LAN - in your house).
Your LAN uses one set of IP Addresses - generally of the form 192.168.x.x - which is a PRIVATE address range and is not propagated over the Internet. There are millions of LANS all using the SAME addresses - "every home will have one" (well it is one way of looking at it).
The result of this is that the address of your PC and Camera are different but on the same 192.168.x.x subnet. The address of MY PC and Camera may be exactly the same as yours but you will never know because we have different LANS which use addresses which are only accessible in our own homes and they are not directly accessible from the outside world.
Just like any networked device on your LAN your Routers WAN side also has an IP address - this address is different - it is unique on the whole Internet. This IP address may change every time your router connects to the Internet and you must know what it is if you need to connect to it from somewhere on the Internet. It is the only way in to your LAN and hence to your camera.
So - you must know what your WAN side IP address is - you have various options here. You can sign up with your Internet Service Provider for a FIXED IP (normally a premium service resulting in extra monthly cost) or you can subscribe to an outside "Dynamic IP DNS" service such as NO-IP.COM (generally free for simple home usage). For a Dynamic IP service you need to regularly register from your router or a PC on your LAN so that it knows what your public IP adress is at any time. Your public IP address will be associated with a fixed name such as "blackjack.servebeer.com" and published on the Internet Name Servers. You can then access the WAN side of your router, no matter what it is, by using the name which will be resolved to whatever IP adress has been assigned by your ISP.
That is only the first part of the issue - whilst you could type "blackjack.servebeer.com" into Internet Explorer and the communication will then pass over the Internet to your router - you will probably get nothing back because the router will just ignore the request for a web page.
You now have to understand that an end point for IP communications has 2 parts - the first is the IP address which we have discussed. The second part is a "PORT". By default web servers listen for incoming requests on port 80 - this is what your camera server is doing. (Note you can generally change the port numbers so you must work out which one you want to use - with just a simple installation it is probably easier just to stick with 80).
So, a web browser on a PC on your LAN can get a picture from the camera by specifying the address of the camera server and the port that the camera server is waiting for requests on (eg 192.168.1.25:80 - where the ":80" is default and so does not have to be specified but would need to be if you used a different port number).
It is a bit more difficult from the Internet because the only adress you have is of the WAN side of the router and you may have several webcams or even many other types of devices and the only way you can distinguish between them would be to associate a different port number with each device.
Now, when a request comes in to your router from the Internet you router must be told what to do with it - in other words a request on port 80 might need to be redirected from the router's WAN port to a camera server listening on port 80 on your LAN, a second camera server would have to be associated with a different port number - such as 81.
For the purposes of configuring the router to forward communication requests coming in on different ports to the particular cameras it is far easier to have FIXED IP addresses on the cameras (each one has a different address!).
There are also different communication types - without going into the complications of these - normal web page accesses use TCP.
So you need to configure your router to redirect TCP port 80 from the WAN side to the IP address you have given to camera 1 and to port 80 at that address. With the 2nd camera you need to redirect TCP port 81 from the WAN side to the IP address you have given to camera 2 and to port 80 at that address (note the camera servers both listen on the default port 80 but in order to be able to see both from outside you need the rotuer to differentiate the requests hence the TCP ports 80 & 81 on the WAN side).
From the Internet you would then enter the address "blackjack.servebeer.com" to see camera 1 and "blackjack.servebeer.com:81" to see camera 2.