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network routing help wanted [solved]
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snIP3r
l33t
l33t


Joined: 21 May 2004
Posts: 818
Location: germany

PostPosted: Mon Jun 25, 2018 11:37 am    Post subject: network routing help wanted [solved] Reply with quote

hi all!

i want to enable lan routing capability to my gentoo backup test server. therefor i added 2 network cars to the box: enp3s0 and enp4s0
enp4s0 gets address through dhcp server in my dsl router and enp3s0 should be a dhcp server for the other network.

enp4s0 is in a 192.168.0.x network and enp3s0 should be a dhcp server for a 192.168.1.x network. this works so far, but i cannot add a route so that every traffic from 192.168.1.x is routed through the enp4s0 card and can go the way to internet.

Code:

/etc/conf.d/net:

config_enp4s0="dhcp"
config_enp3s0="192.168.1.1 netmask 255.255.255.0"



Code:

/etc/conf.d/dhcpd:

DHCPD_IFACE="enp3s0"



Code:

/etc/dhcp/dhcpd.conf:

authoritative;
ddns-update-style interim;
subnet 192.168.1.0 netmask 255.255.255.0 {
    pool {
        range 192.168.1.100 192.168.1.250;
        default-lease-time 259200;
        max-lease-time 518400;
        option subnet-mask 255.255.255.0;
        option broadcast-address 192.168.1.255;
        option routers 192.168.1.1;
        option domain-name-servers 192.168.1.1;
    }
}


any help would be appreciated!
thx in advance
snIP3r
_________________
Intel i3-4130T on ASUS P9D-X
Gentoo Base System 2.2
Kernel 4.19.23-gentoo SMP
-----------------------------------------------
if your problem is fixed please add something like [solved] to the topic!


Last edited by snIP3r on Mon Jun 25, 2018 1:13 pm; edited 1 time in total
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Jaglover
Watchman
Watchman


Joined: 29 May 2005
Posts: 6960
Location: Saint Amant, Acadiana

PostPosted: Mon Jun 25, 2018 12:46 pm    Post subject: Reply with quote

You cannot route private addresses to the internet, this is what NAT was invented for.
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snIP3r
l33t
l33t


Joined: 21 May 2004
Posts: 818
Location: germany

PostPosted: Mon Jun 25, 2018 1:13 pm    Post subject: Reply with quote

OMG!!! i completely mixed this up....

iptables -t nat -A POSTROUTING --source 192.168.1.0/24 --out-interface enp4s0 -j MASQUERADE

did the job...
_________________
Intel i3-4130T on ASUS P9D-X
Gentoo Base System 2.2
Kernel 4.19.23-gentoo SMP
-----------------------------------------------
if your problem is fixed please add something like [solved] to the topic!
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