iptables blocking local traffic











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1
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My local machine IP: 192.168.0.35



What I did: Answer that i tried here!!



sudo iptables -t nat -A OUTPUT -p tcp --dport 80 -j DNAT --to-destination 192.168.0.35:80


The error:



Now I can not access any more IP's from my local machine and I do not know why it happened.



Any IP that is: 123.123.123.123, etc ... The result of any attempt is the default page "Apache2 Debian Default Page". Now I can't access my router page to make changes in port forwarding. I don't know how undo this iptables command.





What i want:



I was looking for a way to: Expose my Webserver, from the router on the Internet over port 80 and 443. Deploy httpd(apache2) on port 1337 and continue dev on 8000,8080. From my router to my Raspbian, I'm trying to:




INTERNET IPx:80,443<===>80,443 router <===> IP-local-web-httpd (raspbian):











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    up vote
    1
    down vote

    favorite












    My local machine IP: 192.168.0.35



    What I did: Answer that i tried here!!



    sudo iptables -t nat -A OUTPUT -p tcp --dport 80 -j DNAT --to-destination 192.168.0.35:80


    The error:



    Now I can not access any more IP's from my local machine and I do not know why it happened.



    Any IP that is: 123.123.123.123, etc ... The result of any attempt is the default page "Apache2 Debian Default Page". Now I can't access my router page to make changes in port forwarding. I don't know how undo this iptables command.





    What i want:



    I was looking for a way to: Expose my Webserver, from the router on the Internet over port 80 and 443. Deploy httpd(apache2) on port 1337 and continue dev on 8000,8080. From my router to my Raspbian, I'm trying to:




    INTERNET IPx:80,443<===>80,443 router <===> IP-local-web-httpd (raspbian):











    share|improve this question









    New contributor




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






















      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      My local machine IP: 192.168.0.35



      What I did: Answer that i tried here!!



      sudo iptables -t nat -A OUTPUT -p tcp --dport 80 -j DNAT --to-destination 192.168.0.35:80


      The error:



      Now I can not access any more IP's from my local machine and I do not know why it happened.



      Any IP that is: 123.123.123.123, etc ... The result of any attempt is the default page "Apache2 Debian Default Page". Now I can't access my router page to make changes in port forwarding. I don't know how undo this iptables command.





      What i want:



      I was looking for a way to: Expose my Webserver, from the router on the Internet over port 80 and 443. Deploy httpd(apache2) on port 1337 and continue dev on 8000,8080. From my router to my Raspbian, I'm trying to:




      INTERNET IPx:80,443<===>80,443 router <===> IP-local-web-httpd (raspbian):











      share|improve this question









      New contributor




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











      My local machine IP: 192.168.0.35



      What I did: Answer that i tried here!!



      sudo iptables -t nat -A OUTPUT -p tcp --dport 80 -j DNAT --to-destination 192.168.0.35:80


      The error:



      Now I can not access any more IP's from my local machine and I do not know why it happened.



      Any IP that is: 123.123.123.123, etc ... The result of any attempt is the default page "Apache2 Debian Default Page". Now I can't access my router page to make changes in port forwarding. I don't know how undo this iptables command.





      What i want:



      I was looking for a way to: Expose my Webserver, from the router on the Internet over port 80 and 443. Deploy httpd(apache2) on port 1337 and continue dev on 8000,8080. From my router to my Raspbian, I'm trying to:




      INTERNET IPx:80,443<===>80,443 router <===> IP-local-web-httpd (raspbian):








      iptables port-forwarding ufw netfilter






      share|improve this question









      New contributor




      Anderson Bosa 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




      Anderson Bosa 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








      edited yesterday









      SouravGhosh

      371210




      371210






      New contributor




      Anderson Bosa is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      asked yesterday









      Anderson Bosa

      61




      61




      New contributor




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





      New contributor





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






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






















          1 Answer
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          0
          down vote













          Be careful using iptables command.



          To have access again you have to delete the iptables command you performed.



          So do with -D option and not -A to undo the command.



          sudo iptables -t nat -D OUTPUT -p tcp --dport 80 -j DNAT --to-destination 192.168.0.35:80






          share|improve this answer





















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            up vote
            0
            down vote













            Be careful using iptables command.



            To have access again you have to delete the iptables command you performed.



            So do with -D option and not -A to undo the command.



            sudo iptables -t nat -D OUTPUT -p tcp --dport 80 -j DNAT --to-destination 192.168.0.35:80






            share|improve this answer

























              up vote
              0
              down vote













              Be careful using iptables command.



              To have access again you have to delete the iptables command you performed.



              So do with -D option and not -A to undo the command.



              sudo iptables -t nat -D OUTPUT -p tcp --dport 80 -j DNAT --to-destination 192.168.0.35:80






              share|improve this answer























                up vote
                0
                down vote










                up vote
                0
                down vote









                Be careful using iptables command.



                To have access again you have to delete the iptables command you performed.



                So do with -D option and not -A to undo the command.



                sudo iptables -t nat -D OUTPUT -p tcp --dport 80 -j DNAT --to-destination 192.168.0.35:80






                share|improve this answer












                Be careful using iptables command.



                To have access again you have to delete the iptables command you performed.



                So do with -D option and not -A to undo the command.



                sudo iptables -t nat -D OUTPUT -p tcp --dport 80 -j DNAT --to-destination 192.168.0.35:80







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered yesterday









                Sylla

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                    Anderson Bosa is a new contributor. Be nice, and check out our Code of Conduct.













                    Anderson Bosa is a new contributor. Be nice, and check out our Code of Conduct.












                    Anderson Bosa is a new contributor. Be nice, and check out our Code of Conduct.
















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