high ping Cannot Connect to Server Hosted a few minutes away

[Lindah]

Hello!
My friend recently created a server and on the first day, I was able to join successfully with no connection lag at all.
I try joining the second and third day and every time I try to connect to the server, it instantly says "Internal Exception: java.netSocketException: Connection reset"
Currently, I have the Java8u25 version, as I've been told it works for the Tekkit Classic Servers. My ping is said to be over 1500 on the bars for the minecraft server, however, on most other games it is from 20-50. What is going on and how can I fix this so I can play on my friends server?