NAT IS A FIREWALL -- inside a router and when on you have a hardware firewall protecting you
Could be the NAT on your router or his/her router. try disabling or opening the NAT.
It depends on your router. You can find the answer on your router manufacturer's website.
Depends on the type of router you have. Google "How to open NAT setting on a [Enter router type here]". You should find your answer there.
You need to access the settings on your router.
you don't
A router passes traffic between networks to reach other computers or servers. A router also does NAT. Nat masquerades traffic behind the router with private IP(Non-internet route able) with the Public IP (Internet route able)
you need a router to fix it sorrymarian4
65536 virtual ports. Port number is a 16 bit number, so there are 2^16 (65536) ports for a NAT router.
debug ip nat
You have to change your NAT type through your router. Call your internet provider for instructions
A router can improve network security if it includes the use of NAT (network address translation) and/or a firewall.