AlphaElwedritsch Sry was using it to test few things 😅
I found out that it was just a problem with MTU, I dunno why but 1500 is too high so I reduced it by 100 and it worked just well (I have no idea what is MTU anyway hahah)
For ppl who has same problem try this:
Check your MTU (default should be 1500)
ip link | grep mtu
Example:
solus@sol ~/development/DDNet-19.2.1/build $ ip link | grep mtu
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
2: enp1s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN mode DEFAULT group default qlen 1000
3: wlp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DORMANT group default qlen 1000
Choose your interface and set MTU less or higher, play with it:
sudo ip link set dev <your interface> mtu <set MTU num>
Example:
sudo ip link set dev wlp2s0 mtu 1400