Unknown network connections in nethogs (is it safe?)

It's about a month that I see some unknown connections in nethogs and I tried to understand what program is responsible for them but I failed. 1. I'm not sure but it seems that my Internet connection becomes laggy or lost every time this connections appear 2. They only appear for a short time and as I notice them they are gone. 3. I'm from Iran. Every time these IPs show up, I can only open websites that are inside Iran (I mean the servers are in Iran) and I can't open any other website! That's really strange. Are these normal connections? If true, what are those for? If false what should I do? 192.168.1.2:53483-91.98.103.126:80 i was trying some of security tips.... i activated UFW and tried some tips from here: https://www.thefanclub.co.za/how-to/how-secure-ubuntu-1204-lts-server-part-1-basics (activated IP spoofing protection). Today the Internet problem happened again. I lost my access to non-Iranian servers/sites but the IPs didn't appeared in the NetHogs and the connection problem lasted for several minutes instead of seconds. I will update this post with more details(if any) hope you can understand the exact situation. Mint 17.1 Cinnamon -marked in red-: -marked in red-: