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Nov 04, 2015 · As pointed out in the comments, the way to do this is to create two NAT rules for both internal services, like this: iptables -t nat -A PREROUTING -d public.ip -p tcp --dport 4444 -j DNAT --to inthost1:12345 iptables -t nat -A PREROUTING -d public.ip -p tcp --dport 5555 -j DNAT --to inthost2:12345 iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -d inthost1 -p tcp --dport 12345 -j MASQUERADE ...

Jan 27, 2020 · # Port forwarding for VM / Container access with „hairpin NAT“. *nat :PREROUTING ACCEPT [3:205] :INPUT ACCEPT [59:670] :OUTPUT ACCEPT [16:172] :POSTROUTING ACCEPT [20:257] # This was simple port forwarding - access works from outside but not from inside #-A PREROUTING -4 -p tcp -i eth0 --dport 80 -j DNAT --to web.local:80 # This is real ...

27.01.2020 · Scenario / Questions:Scenario / Questions This is a Canonical Question about Hairpin NAT (Loopback NAT). The generic form of this question is: We have a network with clients, a server, and a NAT Router. There is port forwarding on the router to the server so some of it's services are available externally. We have DNS…

iptableslinuxnat;routing. I have a dynamic WAN IP so if it changes my iptables will no longer apply. Here is my working hairpin nat, where x.x.x.x is my WAN ...

Using Hairpin to DNAT Internal Packet to External IP. By adding some IPTables rules to the NAT table we can ensure that not only are packets ...

Learned something new today: hairpin nat (with iptables on linux) So I was trying to set up a service that should be accessible from the internet and locally (under the same Domain name and in a different subnet as the internal hosts for security reasons). the variables (from my script I use for testing) are self explainatory I think (IP ...

Aug 28, 2021 · Iptables provide five tables (filter, nat, mangle, security, raw), but the most commonly used are the filter table and the nat table. Tables are organized as chains, and there are five predefined chains, PREROUTING, POSTROUTING, INPUT, FORWARD, and OUTPUT. Here we focus only on the nat table. The filter table is also essential, but it’s mainly used for firewalls, so we do not discuss it ...

Hello all, I am new to Ipfire and I am starting to get familiar with it. I've tested pfsense, opnsense, sophos utm and XG, but only Ipfire ...

Then, I use link above to make hairpin: iptables -t nat -A POSTROUTING -d 10.54.54.1 -s 10.54.54.0/24 -p tcp --dport 80 -j SNAT --to 10.54.

Solved it! I was typo on my side. This is working solution for hairpin NAT: # === FIREWALL === *filter :INPUT ACCEPT [3174:1555907] :FORWARD ...

I would want to reach the home server on the external ip, just like from outside. Basically: nat loopback/nat reflection/nat hairpinning with ...

Another rule I use: iptables -t nat -A POSTROUTING -s 10.0.0.0/8 -o enp4s0 -j MASQUERADE. Then, I use link above to make hairpin: iptables -t nat -A POSTROUTING -d 10.54.54.1 -s 10.54.54.0/24 -p tcp --dport 80 -j SNAT --to 10.54.54.10. Try to curl from my host still, connection refused. 1. Continue this thread. View Entire Discussion (4 Comments)

Aug 12, 2019 · Specifically, I want to match packets coming from the internal network destined for the router's own IP address in the PREROUTING chain, and apply DNAT to them, similar to: iptables -t nat -A PREROUTING -i ens192 -d <self> -p tcp --dport 80 -j DNAT --to-destination 192.168.42.42. Usually, you would replace <self> with the router's own IP address.

Another rule I use: iptables -t nat -A POSTROUTING -s 10.0.0.0/8 -o enp4s0 -j MASQUERADE. Then, I use link above to make hairpin: iptables -t nat -A POSTROUTING -d 10.54.54.1 -s 10.54.54.0/24 -p tcp --dport 80 -j SNAT --to 10.54.54.10. Try to curl from my host still, connection refused. 1. Continue this thread. View Entire Discussion (4 Comments)

28.08.2021 · Iptables provide five tables (filter, nat, mangle, security, raw), but the most commonly used are the filter table and the nat table. Tables are organized as chains, and there are five predefined chains, PREROUTING, POSTROUTING, INPUT, FORWARD, and OUTPUT.. Here we focus only on the nat table. The filter table is also essential, but it’s mainly used for firewalls, so …

Learned something new today: hairpin nat (with iptables on linux) ... iptables -t nat -A PREROUTING -p tcp -d ${EXTIP} --dport 80 -j DNAT --to ${WEB}

iptables -t nat -A PREROUTING -d 1.2.3.4 \ -p tcp --dport 80 -j DNAT --to 192.168.1.1. One way is to run an internal DNS server which knows the real ...

04.11.2015 · As pointed out in the comments, the way to do this is to create two NAT rules for both internal services, like this: iptables -t nat -A PREROUTING -d public.ip -p tcp --dport 4444 -j DNAT --to inthost1:12345 iptables -t nat -A PREROUTING -d public.ip -p tcp --dport 5555 -j DNAT --to inthost2:12345 iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -d inthost1 -p tcp --dport …

I am trying to implement Hairpinning (aka NAT Loopback) for a router using iptables. Specifically, I want to match packets coming from the ...

As pointed out in the comments, the way to do this is to create two NAT rules for both internal services, like this: iptables -t nat -A PREROUTING -d ...

Learned something new today: hairpin nat (with iptables on linux) So I was trying to set up a service that should be accessible from the internet and locally (under the same Domain name and in a different subnet as the internal hosts for security reasons). the variables (from my script I use for testing) are self explainatory I think (IP ...