Table route:

root@debian-s-1vcpu-1gb-nyc1-01:/etc/openvpn# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         68.183.16.1     0.0.0.0         UG    0      0        0 eth0
10.10.0.0       *               255.255.0.0     U     0      0        0 eth0
10.136.0.0      *               255.255.0.0     U     0      0        0 eth1
68.183.16.0     *               255.255.240.0   U     0      0        0 eth0
192.168.254.0   192.168.254.2   255.255.255.0   UG    0      0        0 tun0
192.168.254.2   *               255.255.255.255 UH    0      0        0 tun0

eth0 public IP
tun0 VPN IP

iptables for testing:

#!/bin/bash
# Flushing all rules
iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
iptables -F
iptables -X
iptables -t nat -F
iptables -t nat -X
iptables -t mangle -F
iptables -t mangle -X


iptables -t nat -A PREROUTING -s 0/0 -m tcp -p tcp --dport 8080 -j DNAT --to-destination 68.183.26.243:80 #working!
iptables -t nat -A PREROUTING -s 0/0 -m tcp -p tcp --dport 85 -j DNAT --to-destination 192.168.254.10:80  #not work :(

iptables -I INPUT 1  -p tcp --match multiport --port 85,8080 -j ACCEPT
iptables -I INPUT 2  -p udp --match multiport --port 85,8080 -j ACCEPT
iptables -I OUTPUT 1 -p tcp --match multiport --port 85,8080 -j ACCEPT
iptables -I OUTPUT 2 -p udp --match multiport --port 85,8080 -j ACCEPT

echo "1" > /proc/sys/net/ipv4/conf/eth0/accept_redirects
echo "1" > /proc/sys/net/ipv4/conf/eth0/forwarding
echo "1" > /proc/sys/net/ipv4/conf/tun0/accept_redirects
echo "1" > /proc/sys/net/ipv4/conf/tun0/forwarding
echo "1" > /proc/sys/net/ipv4/conf/all/accept_redirects
echo "1" > /proc/sys/net/ipv4/conf/all/forwarding

Can someone help me? :(

I made these same settings on a server that I have here in the company and it worked, but this is not working.