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How to redirect an external request to localhost?
The redirection would be 0.0.0.0:X -> localhost:X As OP didn’t mention the presence of a firewall, and for simplicity, I will assume no prior iptables settings exist: any traffic is allowed. DNAT can be used in nat/PREROUTING to change the destination IP to 127.0.0.1, like this (example to redirect UDP port 5555):
What’s the iptables rule for port forwarding?
The iptables rule you are using will work, but there is one additional change you need to make: By default this value is 0, which instructs the kernel to not route external traffic destined to 127.0.0.0/8. This is just for security as such traffic is not normal.
Can You redirect to localhost but not to loopback?
And indeed, connections do go through! You can redirect to localhost but not to loopback (127.0.0.0/8). Loopback is a loophole. You have to redirect to one of your real interfaces. Try using REDIRECT.
Is there way to edit iptables in UPD?
UPD: Edit address scheme. The iptables rule you are using will work, but there is one additional change you need to make: By default this value is 0, which instructs the kernel to not route external traffic destined to 127.0.0.0/8. This is just for security as such traffic is not normal.
Why is Linux-IPTables port redirect not working?
You said you are getting connection refused error. This means that there is no local process listening on the port you are trying to connect to! To check the listening processes, use the command: After applying the rule, you should have a process listening on the port 8080 to get connected.
Why is my port redirect not working for localhost?
This means that there is no local process listening on the port you are trying to connect to! To check the listening processes, use the command: After applying the rule, you should have a process listening on the port 8080 to get connected. Remember that you are sending from the localhost. So, you need to redirect the output packet.
Which is the IP address of the host?
To illustrate things a bit more thoroughly below, I will assume that: host’s network interface is eth0, its IP address set on this interface is 192.0.2.100/24 and is receiving traffic from a client 192.0.2