Comment by whatevaa
4 days ago
How do you punch trough firewalls? You have to manually open them, punching through firewall would be a firewall vulnerability.
4 days ago
How do you punch trough firewalls? You have to manually open them, punching through firewall would be a firewall vulnerability.
This is a common function of uPnP, which I've seen as features in router config pages since the mid 2000s.
https://en.wikipedia.org/wiki/Universal_Plug_and_Play#NAT_tr...
Running a firewall with upnp enabled has always amused me. Might as well just turn the firewall off if you let any machine shoot any hole it wants in it.
Typically firewalls will record the src and dst header values of outbound IP packets then temporarily allows inbound IP packets that have those values flipped.