hello. I have an iptables question
i have the following ext_ip -> NAT1 -> linux firewall-> network -> computer1:eth0 .. computer99 i have no control over NAT1. computer1 also can reach the internet via eth1. linux firewall redirects incoming port 7777 from ext_ip to computer1 however i need coputer2 .. computer99 to connect to ext_ip:7777 and also reach computer1 so first i did a NAT rule in linux firewall to redirect all packets from internal to ext_ip:7777 to computer1. and did an 'ifconfig eth0:1 $ext_ip up' on computer1. this works. however it causes computer1 not to be able to access real ext_ip via eth1 which is connected to the internet as well so i though of both doing DNAT and MASQ, which will do the same but will not require assiging ext_ip to computer1. howerver i do not know how to do that anyone ?
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