>> Can you elaborate on your network topology and NAT? > > Out bound traffic from 95.130.9.210 goes via 95.130.9.1 then 95.130.8.1 then out to the real world. outbound: [ 95.130.9.210 ] --> [outbound gw 95.130.9.1 ] --> [2th hop 95.130.8.1 ] --> inet > In bound traffic comes via 95.130.8.11 then 9.130.8.120 inbound: [ 95.130.9.210 ] <-- [ 9.130.8.120 ] <-- [SNAT:95.130.8.11 ] <-- inet > It's NATted at 95.130.8.11 and all I see is this address connected to the system(ie all connections show as 95.130.8.11). > > My /etc/network/interface - the DNS server is temporary for testing. If I understood you correctly and they are simply replacing the source IP of all incoming packets I'd say this is broken network and ask them to fix it. (it will break more than just DNS resolution unless they are NATing only on specific protocols [udp] and ports [53]). > auto enp4s0 > iface enp4s0 inet static > address 95.130.9.210 > netmask 255.255.255.255 > network 95.130.9.210 > broadcast 95.130.9.210 > dns-nameservers 95.130.8.8 95.130.8.9 > #Route statique vers la passerelle > up ip route add 95.130.9.1 dev enp4s0 > up ip route add default via 95.130.9.1 > > up ip addr add 95.130.12.251/24 dev enp4s0 > up ip addr add 95.130.12.252/24 dev enp4s0 -- https://mastodon.social/@nusenu twitter: @nusenu_
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