network problem (isolated cases)



  • hi forum , I have a couple of isolated cases, the vlan of my servers has free exit through the firewall, I can go anywhere, a few days ago I had a vm with windows 2012 server and did not go online, this vm was for a long time fine, looking in the firewall if I was blocking and did not find anything, the last thing I did was change ip vm and went to the internet without problems.

    I started thinking, what happened here?

    annex the rules of that vlan and the traffic of the vm with tcpdump

    0_1540766106431_Captura de pantalla 2018-10-28 a la(s) 4.34.58 p. m..png

    tcpdump trafic

    0_1540766130216_Captura de pantalla 2018-10-28 a la(s) 3.49.33 p. m..png

    I do tests with the dns when consulting registries of other domains from the vm and
    these resolve well, but I can not surf the internet.