The current processing of ICMP unreachable causes an immediate disconnect if the last path is considered unreachable. This means that an attacker could kill a connection by forging an ICMP unreachable message, something that a "man on the side" could easily do.
The current processing of ICMP unreachable causes an immediate disconnect if the last path is considered unreachable. This means that an attacker could kill a connection by forging an ICMP unreachable message, something that a "man on the side" could easily do.