Hello,

I'm having some very strange issues with my mikrotik router.

I'm web developer, when I'm developing I make lots of requests to our development server. Sometimes (3-4 times today) I can't open the development server but after router restart it opens just fine. The strangest thing is that when this ocures, only me and one of my colleagues (we are the only ones with Linux) can't open this IP, all my other colleagues connected to the same WiFi network as me CAN open it?!?

What is this thing I'm dealing with, is it some automatic firewall tool from Mikrotik?

Can you post your config?

So it seems the problem was with the router date and /proc/sys/net/ipv4/tcp_timestamps setting on my Linux, after setting
everything now works fine, and I also added NTP servers for the clock in the router.

Good to hear you figured it out.