I'll assume you had your own third party wireless router previously. You can continue to use that by connecting its WAN (Internet) to one of the Viasat LAN (ethernet) ports. There are a number of possible configuartions to do this depending on your third party router's brand an model number. Provide us with that info and we can offer some suggestions - often it's simply a matter of connecting the two and simply disabling the wireless capabilities of the Viasat device to regain the covergae you previously had. However, on some occasions you need to confihgure your router to avoid IP addressing conflicts between the two devices.
In a nutshell it appears that that router uses a default IP address of 192.168.1.1 and a DHCP server range of IP addresses starting at 192.168.1.100 - both of those conflict with the defaults used with the Viasat device. If that makes sense go no further and you already know what to do.
However, It would be best to use a wired connection to your Linksys to configure the default IP address and DHCP server ranges to something different before connecting it to the Viasat device.
For example on the following screen capture obtained from setuprouter.com, you'd want to change the items pointed to (Local IP Address and Starting IP Address) to 192.168.0.1 and 192.168.0.100 and save.
All other options shown (with possible exception of Time Zone) appear to be good also.
Reboot the Linksys to determine if you can see its Wireless network.
If so and at that time you can connect the Linksys to the Viasat device, connect to the Linksys Wireless network and see if you have Internet access.
Just don't make any changes on the Viasat device until verified that the Linksys is working and if that's the case you can then disable the wireless functionality on the Viasat device.
Sounds more complex than it really is... but there are plenty of folks around here that can guide you through it if needed. Just come back and ask...
There are some other config options if it comes to it.
While some claim problems with Linksys routers, apparently you weren't experiencing any and no sense in giving up on it just yet.
Hi Kelly - Also, if you connect a router to the Viasat modem, you will want to disable the wifi on the Viasat modem, otherwise you might find that you continue to have wireless connection problems. Disable it through the Wireless settings and make sure you do both the 5 MHz and 2.4 MHz.
Plug a hardwire into the Linksys modem and disconnect the cable between the two modems/routers and see if you can access the Linksys configuration at 192.168.1.1. Then try 192.168.0.1 which is what it should be from above.
I've seen issues re: range of signal for Exede modem so I disabled the wireless and added my own Linksys EA6350 AC1200+ modem in cascade mode. Initially I tried adding the modem and it's own config added anything connected to it in the 10.xx.xx.xx realm. All is well for each device accessing the internet but for example I have a Ethernet connected printer and if it is plugged into the Exede modem, PC's connected to the Linksys router can't print. I came across the Linksys paper below on cascading routers and now all is well. I disabled wireless on the Exede modem and turned off DHCP on the Linksys router so now 2 PC's, 1 network printer, NAS storage are now on the same subnetwork and share data and resources regardless of which device they are plugged into as they are all on the 192.168.1.xx subnetwork.
The directions below refer to a Linksys router but the concept is the same for every router. Additionally I can access the Exede router at 192.168.1.1 and the Linksys router at 192.168.1.2 from and PC whether connected to The Exede router or the Linksys router.
Step by step here: https://www.linksys.com/us/support-article?articleNum=132275