[grishka]

And probably buying a static IP from your ISP.

[byteknight]

Just DDNS

[grishka]

Not all home ISPs give you an entire IPv4 address. Some have fewer IPs than subscribers and thus use a NAT. Sometimes a very restrictive one.

[roywashere]

In Europe, most ISPs use carrier graden NAT nowadays

[panki27]

You can get around the issues of CG-NAT by setting up a reverse tunnel to an external server you control.