I had my first encounter with the Nether today.
Well, not quite my first one, I have occasionally gone through Nether before, but this time it got serious.

I used the new Nether portal at Ivan's village intending to get to the City.
After a few steps in, a Ghast started firing at me. After the initial shock I realized that the fireballs are moving quite slowly and figured that I could probably dodge them. So the next time he fired, I ran foreward and indeed, I managed to run under the shot.

But when I turned around, I saw that the fireball had hit the portal and had damaged and deactivated it.

So now I was stuck in the unknown and with no chance of a way back.
I ran forward and fortunately found the portal to Scienters Resort. What a close call.

Anything I can do to repair the portal, or is that gone forever now?