You can freshen up your modem and router settings by powering both of them down for about 10 minutes.
When starting them back up...
power up the Router
Then power up the Modem
Then reboot your computer.
How do I do this?
Very good work on your part!
Powering down and powering up the Modem and the Router is simply referring to turning off (or disconnecting power cord) and turning on, (or plugging power cord back in)
Most DSL modems these days have an ON/OFF Switch (often a push-button) on the back of the unit.
Many/most Routers still rely on having the power-cord removed or plugged back in to turn it off or on.
Since you apparently have already resolved your main problem, you do not have to do the Power Down / Power Up cycling as recommended earlier.
*** "If it ain't broke, don't be fixin' on it." <-- good advice
Note on Routers and Modems.
They mostly just sit there.
We're glad that their lights are all shining brightly, but we don't much think about their function beyond that.
We hardly ever "input" any instructions to them, except when installing or upgrading firmware.
So we really don't think of them as "processesing" much information, the way we think of our computer's CPU/RAM/Hard Drive working actively and interfacing with our keyboard commands.
----- But it just isn't so! Both Modem and Router are constantly "processing" information, accepting/rejecting/routing large information flows between our machines and destinations over the internet.
----- Still, we have a "Set it, and Forget it" attitude about Modem and Routers.
We are much more "understanding" when some Application Program "hangs" during operation.
Average-Experienced users know to try a Re-Boot. If that fails, try a repair through the Application's Options. And if that fails we tend to know the best bet is to Uninstall and Reinstall the Application.
So why don't we think that Modems and Routers might sometimes need the same?
Well, we don't do much Graphical Interface (entering commands and responding to prompts) with the Modem and Router.
I've left my Modem and Router "Always on" for months at a time, never giving them a second thought.
Generally leaving them "always on" is just fine, as long as they have good passive air circulation for cooling.
But every now and then (say once monthly) it is good practice to "Power Cycle" both your Modem and Router.
Power Cycling, as described in the steps above (simply turning them off for 10-20 minutes) will allow them to return to their factory or firmware defaults, clearing out any debris or corrupted settings that may have accumulated.
Note: ON/OFF - ON/OFF - ON/OFF at frequent intervals is not good practice for any electronic components, as capacitors have to charge up, and other components shift from cold to extremely hot, causing heat/cold stress. So once a month is about enough, unless you are having a specific problem with the units.
As to your Comodo Firewall Settings, please start a new topic in This Same Forum "Browsers, Internet, Email" and include the name Comodo Firewall Settings in your Topic Title.
I can go a short ways with you on the settings and such, but have never used Comodo.
Others here have used Comodo and may be of greater help.