История изменений

я бы использовал xinetd

service provider1
{
disable = no
type = UNLISTED
socket_type = stream
protocol = tcp
user = nobody
wait = no
redirect = internalip internalport
port = listenport1
bind = provider1_public_ip
}

service provider2
{
disable = no
type = UNLISTED
socket_type = stream
protocol = tcp
user = nobody
wait = no
redirect = internalip internalport
port = listenport2
bind = provider2_public_ip
}

хотя думаю можно и на один порт повесить

я бы использовал xinetd

service provider1
{
disable = no
type = UNLISTED
socket_type = stream
protocol = tcp
user = nobody
wait = no
redirect = internalip internalport
port = listenport1
bind = provider1_public_ip
}

service provider2
{
disable = no
type = UNLISTED
socket_type = stream
protocol = tcp
user = nobody
wait = no
redirect = internalip internalport
port = listenport2
bind = provider2_public_ip
}