Ubuntu 9.04 network connected but no internet

[Panayiotis Ntzamilis]

> δεν έχεις ούτε καν βασική επικοινωνία IP με τον router σου και επειδή
> αναφέρεις ότι παίρνεις IP οπότε η κάρτα σου και το router θα έπρεπε να
> επικοινωνούνε το πρώτο που μπορώ να σκεφτώ είναι μήπως έχεις κάποιο
> firewall.

panayiotis at panayiotis-laptop:~$ sudo iptables -L
[sudo] password for panayiotis:
Chain INPUT (policy DROP)
target     prot opt source               destination
ACCEPT     all  --  anywhere             anywhere
LOG        all  --  127.0.0.0/8          anywhere            LOG level warning
DROP       all  --  127.0.0.0/8          anywhere
DROP       all  --  anywhere             224.0.0.1
LOG        all  --  anywhere             anywhere            LOG level warning
DROP       all  --  anywhere             anywhere

Chain FORWARD (policy DROP)
target     prot opt source               destination
DROP       all  --  anywhere             224.0.0.1
LOG        all  --  anywhere             anywhere            LOG level warning
DROP       all  --  anywhere             anywhere

Chain OUTPUT (policy DROP)
target     prot opt source               destination
ACCEPT     all  --  anywhere             anywhere
DROP       all  --  anywhere             224.0.0.1
LOG        all  --  anywhere             anywhere            LOG level warning
DROP       all  --  anywhere             anywhere

>
> Αν θυμάμαι καλά μπορείς να σταματήσεις κάθε firewalling με την εντολή
>    iptables -F

panayiotis at panayiotis-laptop:~$ sudo iptables -F

> Δοκίμασε την και μετά ξανάδωσε τα 3 pings:

>   ping -c 3 192.168.1.1
panayiotis at panayiotis-laptop:~$ ping -c 3 192.168.1.1
PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data.
ping: sendmsg: Operation not permitted
ping: sendmsg: Operation not permitted
ping: sendmsg: Operation not permitted
--- 192.168.1.1 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2015ms


>   ping -c 3 209.85.229.99
panayiotis at panayiotis-laptop:~$ ping -c 3 209.85.229.99
PING 209.85.229.99 (209.85.229.99) 56(84) bytes of data.
ping: sendmsg: Operation not permitted
ping: sendmsg: Operation not permitted
ping: sendmsg: Operation not permitted
--- 209.85.229.99 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2014ms


>   ping -c 3 www.google.com



>
> Aν δεν παίξει κάποιο από τα 2 πρώτα δώσε μας την έξοδο των εντολών
>   ping -c 1 localhost
panayiotis at panayiotis-laptop:~$ ping -c 1 localhost
PING localhost (127.0.0.1) 56(84) bytes of data.
ping: sendmsg: Operation not permitted

--- localhost ping statistics ---
1 packets transmitted, 0 received, 100% packet loss, time 0ms

>   cat /etc/network/interfaces
auto lo
iface lo inet loopback

>   ifconfig
eth0      Link encap:Ethernet  HWaddr 00:08:02:b9:20:9e
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:4 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:240 (240.0 B)  TX bytes:240 (240.0 B)

wlan0     Link encap:Ethernet  HWaddr 00:1a:70:2f:69:0d
          inet addr:192.168.1.100  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::21a:70ff:fe2f:690d/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:20 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1796 (1.7 KB)  TX bytes:1413 (1.4 KB)

wmaster0  Link encap:UNSPEC  HWaddr
00-1A-70-2F-69-0D-39-30-00-00-00-00-00-00-00-00
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

>   iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.

pan0      no wireless extensions.

wmaster0  no wireless extensions.

wlan0     IEEE 802.11bg  ESSID:"P-1510"
          Mode:Managed  Frequency:2.462 GHz  Access Point: 00:18:39:28:E5:D4
          Bit Rate=1 Mb/s   Tx-Power=4 dBm
          Retry min limit:7   RTS thr:off   Fragment thr=2352 B
          Power Management:off
          Link Quality=72/100  Signal level:-44 dBm
          Rx invalid nwid:0  Rx invalid crypt:0  Rx invalid frag:0
          Tx excessive retries:0  Invalid misc:0   Missed beacon:0

>   route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     0.0.0.0         255.255.255.0   U     0      0        0 wlan0
0.0.0.0         192.168.1.1     0.0.0.0         UG    0      0        0 wlan0

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

Chain FORWARD (policy DROP)
target     prot opt source               destination

Chain OUTPUT (policy DROP)
target     prot opt source               destination
>
> --
> "The software is licensed, not sold" -- MICROSOFT LICENSE TERMS
>