Ping works but all other ports are blocked

Discussion in 'OS X Mountain Lion (10.8)' started by tinytiger, Oct 18, 2012.

  1. macrumors newbie

    Joined:
    Oct 18, 2012
    #1
    Since yesterday morning I am facing a very strange issue with my MacBook Pro which prevents me from going online. Since then I researched a lot of possible solutions, tried many suggestions and at last, re-installed the system but to no avail.

    I am running Mac OS 10.8.2 for a few weeks with no problems yet. The internet connection just stopped working when I started the computer in the morning. I did'nt install any new software and as far as I can tell,there were no system updates. I tried to go online different ways: through Wi-Fi, Ethernet cable, and an USB stick, everywhere the same symptoms. I can ping IPs and get a response, but DNS or any other service is not working (FTP, SSH, HTTP..). Itis driving me crazy...

    Here are some info that might help with the problem (Wi-Fi connection over a Speedort W722v):
    Code:
    ------
    scutil --dns
    
    DNS configuration
    
    resolver #1
      nameserver[0] : 192.168.2.1
      reach    : Reachable,Directly Reachable Address
    
    resolver #2
      domain   : local
      options  : mdns
      timeout  : 5
      order    : 300000
    
    resolver #3
      domain   : 254.169.in-addr.arpa
      options  : mdns
      timeout  : 5
      order    : 300200
    
    resolver #4
      domain   : 8.e.f.ip6.arpa
      options  : mdns
      timeout  : 5
      order    : 300400
    
    resolver #5
      domain   : 9.e.f.ip6.arpa
      options  : mdns
      timeout  : 5
      order    : 300600
    
    resolver #6
      domain   : a.e.f.ip6.arpa
      options  : mdns
      timeout  : 5
      order    : 300800
    
    resolver #7
      domain   : b.e.f.ip6.arpa
      options  : mdns
      timeout  : 5
      order    : 301000
    
    DNS configuration (for scoped queries)
    
    resolver #1
      nameserver[0] : 192.168.2.1
      if_index : 5 (en1)
      flags    : Scoped
      reach    : Reachable,Directly Reachable Address
    
    -----
    netstat -f 
    
    Name  Mtu   Network       Address            Ipkts Ierrs    Opkts Oerrs  Coll
    lo0   16384 <Link#1>                          1246     0     1246     0     0
    lo0   16384 localhost   fe80:1::1             1246     -     1246     -     -
    lo0   16384 127           localhost           1246     -     1246     -     -
    lo0   16384 localhost   ::1                   1246     -     1246     -     -
    gif0* 1280  <Link#2>                             0     0        0     0     0
    stf0* 1280  <Link#3>                             0     0        0     0     0
    en0   1500  <Link#4>    c8:2a:14:09:65:13        0     0        0     0     0
    en1   1500  <Link#5>    e0:f8:47:25:84:c0      561     0      255     0     0
    en1   1500  macintosh.l fe80:5::e2f8:47ff      561     -      255     -     -
    en1   1500  169.254       macintosh.local      561     -      255     -     -
    p2p0  2304  <Link#6>    02:f8:47:25:84:c0        0     0        0     0     0
    fw0   4078  <Link#7>    70:cd:60:ff:fe:be:0e:9e        0     0        0     0     0
    
    ----
    dig www.google.com
    
    ; <<>> DiG 9.8.3-P1 <<>> www.google.com
    ;; global options: +cmd
    ;; connection timed out; no servers could be reached
    
    
    ----
    dig @8.8.8.8 www.google.com
    
    
    ; <<>> DiG 9.8.3-P1 <<>> @8.8.8.8 www.google.com
    ; (1 server found)
    ;; global options: +cmd
    ;; connection timed out; no servers could be reached
    
     
  2. macrumors 68020

    charlieegan3

    Joined:
    Feb 16, 2012
    Location:
    U.K
    #2
    in the network connections window try removing the adapter you're trying to use and then adding a it again just by clicking the add button. This solved a similar issue for me in the past.
     
  3. thread starter macrumors newbie

    Joined:
    Oct 18, 2012
    #3
    Re-creating network connection

    I tried to remove the network connection and added it again. I also tried to remove it and restart my mac. The only thing that changed is before there was an exclamation mark in the wi-fi symbol on the top bar which is gone now. But still no internet connection.:confused:
    I should add that I can open an internet connection when I start my mac in the Recovery mode.
     
  4. macrumors 65816

    Joined:
    Nov 26, 2007
    Location:
    Austin, TX
    #4
    Perhaps 192.168.2.1 is not a valid or working dns server? Try using 8.8.8.8 for your dns server.

    Also, are you certain your router is working properly? Perhaps it needs some attention and/or a reboot...
     

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