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How to drop dns packet in nat?


iptables sharing internet connection with restricted accessWebmin Port ForwardingHow to use my ubuntu server as router?Resolve domain names to IP's based on physical adapterForwarding traffic with IPtables through a series of IDSSharing connection - IPTABLESUbuntu: VPN kills NATubuntu iptables NAT & Router & Port ForwardingStuck on “Setting up VPN Linux Tutorial”: replace “eth0” with the internet connection from serverBlock DNS traffic except for 1 device













0















My conputer with ubuntu share internet connection with NAT (internet eth0, ip 1.2.3.4 and LAN eth2, ip 192.168.0.1/16).
I want to use my own dnsmasq service on this ubuntu and deny all requests to other dns servers in internet from LAN.



How can i configure this in iptables?



Now my iptables allow all from all and masquerade traffic from eth2 to eth0 (internet).










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    My conputer with ubuntu share internet connection with NAT (internet eth0, ip 1.2.3.4 and LAN eth2, ip 192.168.0.1/16).
    I want to use my own dnsmasq service on this ubuntu and deny all requests to other dns servers in internet from LAN.



    How can i configure this in iptables?



    Now my iptables allow all from all and masquerade traffic from eth2 to eth0 (internet).










    share|improve this question







    New contributor




    Alexey is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.























      0












      0








      0








      My conputer with ubuntu share internet connection with NAT (internet eth0, ip 1.2.3.4 and LAN eth2, ip 192.168.0.1/16).
      I want to use my own dnsmasq service on this ubuntu and deny all requests to other dns servers in internet from LAN.



      How can i configure this in iptables?



      Now my iptables allow all from all and masquerade traffic from eth2 to eth0 (internet).










      share|improve this question







      New contributor




      Alexey is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.












      My conputer with ubuntu share internet connection with NAT (internet eth0, ip 1.2.3.4 and LAN eth2, ip 192.168.0.1/16).
      I want to use my own dnsmasq service on this ubuntu and deny all requests to other dns servers in internet from LAN.



      How can i configure this in iptables?



      Now my iptables allow all from all and masquerade traffic from eth2 to eth0 (internet).







      iptables






      share|improve this question







      New contributor




      Alexey is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      share|improve this question







      New contributor




      Alexey is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      share|improve this question




      share|improve this question






      New contributor




      Alexey is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.









      asked 5 hours ago









      AlexeyAlexey

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      12




      New contributor




      Alexey is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.





      New contributor





      Alexey is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.






      Alexey is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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