Socat port forwarding

We have learned before ssh Port forwarding 、 Firewall port forwarding 、rinetd Port forwarding 、nc Port forwarding , Today we'll look at an enhanced version nc Port forwarding ,socat This tool and nc A little bit of origin , All are cat, It's all network related , Can do port forwarding 、 File transfer , These functions are the tip of the iceberg , If you have time, you can continue to dig deeply , Today, let's look at port forwarding , There are colored eggs at the end of the article ～

nc yes net cat , socat yes socket cat, Similar names , Functions are similar

Experimental environment ：

• macos：192.168.199.206
• kali：192.168.199.247
• centos：192.168.199.236

Experiment 1 ： Local forwarding

socat TCP-LISTEN:8888,reuseaddr,fork TCP:127.0.0.1:22

Take a look at packet capturing from the perspective of hackers

Then take a look at the traffic from the perspective of the victim , How does it feel like forwarding on other ports

Experiment two ： Remote port forwarding , Change IP address

socat TCP-LISTEN:7777,reuseaddr,fork TCP:192.168.199.236:22

• Look at the traffic from the perspective of hackers , equally , No mapping
• Look at the traffic from the perspective of the springboard , equally , No more

Network security has a long way to go , Wash and sleep ～

Colored eggs ： Use socat Transfer a small file from macos Pass on to kali

1、 stay macos On the operation

socat -u open: hackers 0717.png tcp-listen:7777,reuseaddr

2、 stay kali On the operation

socat -u tcp:192.168.199.206:7777 open: hackers 0717.png,create

3、 Check , Successfully get 「“ hackers 0717” This picture 」