Den HTTP und HTTPS Traffic mit iptables an den neuen Server weiterleiten:

#!/bin/sh

# redirect traffic on specified ports to other IP

# own/old IP
ME="176.9.123.123"

# new/destination IP
NEW="144.76.123.123"

echo 1 > /proc/sys/net/ipv4/ip_forward

iptables -F
iptables -t nat -F
iptables -X

#port 80 forwarding (http)
iptables -t nat -A PREROUTING -p tcp --dport 80 -j DNAT --to-destination $NEW:80
iptables -t nat -A POSTROUTING -p tcp -d $NEW --dport 80 -j SNAT --to-source $ME

#port 443 forwarding (https)
iptables -t nat -A PREROUTING -p tcp --dport 443 -j DNAT --to-destination $NEW:443
iptables -t nat -A POSTROUTING -p tcp -d $NEW --dport 443 -j SNAT --to-source $ME