Why iptables is flowing? [closed]

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0
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I have iptables configuration:



# iptables -L
Chain INPUT (policy DROP)
target prot opt source destination 

Chain FORWARD (policy DROP)
target prot opt source destination 
DROP all -- anywhere anywhere 

Chain OUTPUT (policy DROP)
target prot opt source destination 
DROP all -- anywhere anywhere


And after, trying this:



user@debian:~$ host yahoo.com
../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
yahoo.com has address 98.138.219.232
yahoo.com has address 72.30.35.9
yahoo.com has address 72.30.35.10
yahoo.com has address 98.137.246.7
yahoo.com has address 98.137.246.8
yahoo.com has address 98.138.219.231
yahoo.com has IPv6 address 2001:4998:c:1023::5
yahoo.com has IPv6 address 2001:4998:44:41d::3
yahoo.com has IPv6 address 2001:4998:44:41d::4
yahoo.com has IPv6 address 2001:4998:58:1836::10
yahoo.com has IPv6 address 2001:4998:58:1836::11
yahoo.com has IPv6 address 2001:4998:c:1023::4
yahoo.com mail is handled by 1 mta7.am0.yahoodns.net.
yahoo.com mail is handled by 1 mta5.am0.yahoodns.net.
yahoo.com mail is handled by 1 mta6.am0.yahoodns.net.


How? I thought, it was "cache", and try some others domains. They all been resolved.



"Ok, maybe it's some local DNS cache" - turn off internet from machine. Ok didn't resolve.



How? Why?




debian iptables dns




share|improve this question













closed as unclear what you're asking by sebasth, Anthony Geoghegan, schily, Stephen Kitt, Rui F Ribeiro Jun 14 at 18:57


Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.














  • If you think your edit answers your question, post it as an answer.
    – Tomasz
    Jun 14 at 13:00














up vote
0
down vote

favorite












I have iptables configuration:



# iptables -L
Chain INPUT (policy DROP)
target prot opt source destination 

Chain FORWARD (policy DROP)
target prot opt source destination 
DROP all -- anywhere anywhere 

Chain OUTPUT (policy DROP)
target prot opt source destination 
DROP all -- anywhere anywhere


And after, trying this:



user@debian:~$ host yahoo.com
../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
yahoo.com has address 98.138.219.232
yahoo.com has address 72.30.35.9
yahoo.com has address 72.30.35.10
yahoo.com has address 98.137.246.7
yahoo.com has address 98.137.246.8
yahoo.com has address 98.138.219.231
yahoo.com has IPv6 address 2001:4998:c:1023::5
yahoo.com has IPv6 address 2001:4998:44:41d::3
yahoo.com has IPv6 address 2001:4998:44:41d::4
yahoo.com has IPv6 address 2001:4998:58:1836::10
yahoo.com has IPv6 address 2001:4998:58:1836::11
yahoo.com has IPv6 address 2001:4998:c:1023::4
yahoo.com mail is handled by 1 mta7.am0.yahoodns.net.
yahoo.com mail is handled by 1 mta5.am0.yahoodns.net.
yahoo.com mail is handled by 1 mta6.am0.yahoodns.net.


How? I thought, it was "cache", and try some others domains. They all been resolved.



"Ok, maybe it's some local DNS cache" - turn off internet from machine. Ok didn't resolve.



How? Why?




debian iptables dns




share|improve this question













closed as unclear what you're asking by sebasth, Anthony Geoghegan, schily, Stephen Kitt, Rui F Ribeiro Jun 14 at 18:57


Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.














  • If you think your edit answers your question, post it as an answer.
    – Tomasz
    Jun 14 at 13:00












up vote
0
down vote

favorite









up vote
0
down vote

favorite











I have iptables configuration:



# iptables -L
Chain INPUT (policy DROP)
target prot opt source destination 

Chain FORWARD (policy DROP)
target prot opt source destination 
DROP all -- anywhere anywhere 

Chain OUTPUT (policy DROP)
target prot opt source destination 
DROP all -- anywhere anywhere


And after, trying this:



user@debian:~$ host yahoo.com
../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
yahoo.com has address 98.138.219.232
yahoo.com has address 72.30.35.9
yahoo.com has address 72.30.35.10
yahoo.com has address 98.137.246.7
yahoo.com has address 98.137.246.8
yahoo.com has address 98.138.219.231
yahoo.com has IPv6 address 2001:4998:c:1023::5
yahoo.com has IPv6 address 2001:4998:44:41d::3
yahoo.com has IPv6 address 2001:4998:44:41d::4
yahoo.com has IPv6 address 2001:4998:58:1836::10
yahoo.com has IPv6 address 2001:4998:58:1836::11
yahoo.com has IPv6 address 2001:4998:c:1023::4
yahoo.com mail is handled by 1 mta7.am0.yahoodns.net.
yahoo.com mail is handled by 1 mta5.am0.yahoodns.net.
yahoo.com mail is handled by 1 mta6.am0.yahoodns.net.


How? I thought, it was "cache", and try some others domains. They all been resolved.



"Ok, maybe it's some local DNS cache" - turn off internet from machine. Ok didn't resolve.



How? Why?




debian iptables dns




share|improve this question













I have iptables configuration:



# iptables -L
Chain INPUT (policy DROP)
target prot opt source destination 

Chain FORWARD (policy DROP)
target prot opt source destination 
DROP all -- anywhere anywhere 

Chain OUTPUT (policy DROP)
target prot opt source destination 
DROP all -- anywhere anywhere


And after, trying this:



user@debian:~$ host yahoo.com
../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
yahoo.com has address 98.138.219.232
yahoo.com has address 72.30.35.9
yahoo.com has address 72.30.35.10
yahoo.com has address 98.137.246.7
yahoo.com has address 98.137.246.8
yahoo.com has address 98.138.219.231
yahoo.com has IPv6 address 2001:4998:c:1023::5
yahoo.com has IPv6 address 2001:4998:44:41d::3
yahoo.com has IPv6 address 2001:4998:44:41d::4
yahoo.com has IPv6 address 2001:4998:58:1836::10
yahoo.com has IPv6 address 2001:4998:58:1836::11
yahoo.com has IPv6 address 2001:4998:c:1023::4
yahoo.com mail is handled by 1 mta7.am0.yahoodns.net.
yahoo.com mail is handled by 1 mta5.am0.yahoodns.net.
yahoo.com mail is handled by 1 mta6.am0.yahoodns.net.


How? I thought, it was "cache", and try some others domains. They all been resolved.



"Ok, maybe it's some local DNS cache" - turn off internet from machine. Ok didn't resolve.



How? Why?





debian iptables dns





share|improve this question












share|improve this question




share|improve this question








edited Jun 14 at 13:29
























asked Jun 14 at 12:45









user41204

164




164




closed as unclear what you're asking by sebasth, Anthony Geoghegan, schily, Stephen Kitt, Rui F Ribeiro Jun 14 at 18:57


Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.






closed as unclear what you're asking by sebasth, Anthony Geoghegan, schily, Stephen Kitt, Rui F Ribeiro Jun 14 at 18:57


Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.













  • If you think your edit answers your question, post it as an answer.
    – Tomasz
    Jun 14 at 13:00
















  • If you think your edit answers your question, post it as an answer.
    – Tomasz
    Jun 14 at 13:00















If you think your edit answers your question, post it as an answer.
– Tomasz
Jun 14 at 13:00




If you think your edit answers your question, post it as an answer.
– Tomasz
Jun 14 at 13:00










1 Answer
1






active

oldest

votes

















up vote
1
down vote













Solved!



I didn't notice that magic:



yahoo.com has address 98.138.219.231
yahoo.com has IPv6 address 2001:4998:c:1023::5


And thus, i have to setup rules for "ip6tables":



# ip6tables -P INPUT DROP
# ip6tables -P OUTPUT DROP
# ip6tables -P FORWARD DROP


and my result:



../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
;; connection timed out ; no servers could be reached


P.S. If I remembered about "tcpdump", then problem solved faster.






share|improve this answer




























    1 Answer
    1






    active

    oldest

    votes








    1 Answer
    1






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes








    up vote
    1
    down vote













    Solved!



    I didn't notice that magic:



    yahoo.com has address 98.138.219.231
    yahoo.com has IPv6 address 2001:4998:c:1023::5


    And thus, i have to setup rules for "ip6tables":



    # ip6tables -P INPUT DROP
    # ip6tables -P OUTPUT DROP
    # ip6tables -P FORWARD DROP


    and my result:



    ../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
    ../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
    ;; connection timed out ; no servers could be reached


    P.S. If I remembered about "tcpdump", then problem solved faster.






    share|improve this answer

























      up vote
      1
      down vote













      Solved!



      I didn't notice that magic:



      yahoo.com has address 98.138.219.231
      yahoo.com has IPv6 address 2001:4998:c:1023::5


      And thus, i have to setup rules for "ip6tables":



      # ip6tables -P INPUT DROP
      # ip6tables -P OUTPUT DROP
      # ip6tables -P FORWARD DROP


      and my result:



      ../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
      ../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
      ;; connection timed out ; no servers could be reached


      P.S. If I remembered about "tcpdump", then problem solved faster.






      share|improve this answer























        up vote
        1
        down vote










        up vote
        1
        down vote









        Solved!



        I didn't notice that magic:



        yahoo.com has address 98.138.219.231
        yahoo.com has IPv6 address 2001:4998:c:1023::5


        And thus, i have to setup rules for "ip6tables":



        # ip6tables -P INPUT DROP
        # ip6tables -P OUTPUT DROP
        # ip6tables -P FORWARD DROP


        and my result:



        ../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
        ../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
        ;; connection timed out ; no servers could be reached


        P.S. If I remembered about "tcpdump", then problem solved faster.






        share|improve this answer













        Solved!



        I didn't notice that magic:



        yahoo.com has address 98.138.219.231
        yahoo.com has IPv6 address 2001:4998:c:1023::5


        And thus, i have to setup rules for "ip6tables":



        # ip6tables -P INPUT DROP
        # ip6tables -P OUTPUT DROP
        # ip6tables -P FORWARD DROP


        and my result:



        ../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
        ../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
        ;; connection timed out ; no servers could be reached


        P.S. If I remembered about "tcpdump", then problem solved faster.







        share|improve this answer













        share|improve this answer



        share|improve this answer











        answered Jun 14 at 13:12









        user41204

        164




        164












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