[SATLUG] help with name resolutions

Jon Mark Allen jm at allensonthe.net
Thu Nov 18 14:16:31 CST 2010


what does 'cat /proc/sys/net/ipv4/icmp_echo_ignore_all' show?

Can you ping your inside and/or outside interfaces from other machines?

JM

On Thu, Nov 18, 2010 at 14:10, r3d91ll <r3d91ll at grandecom.net> wrote:
> more info on this strange ping behavior:
> if I try to ping the server from the wan side (eth0) I get dropped
> packets.  if I try to ping from the lan side (eth1) I get dropped
> packets. if I try to ping from the server (lo) I get dropped packets.
> If I try to access apache via Lynx at localhost I access the server just
> fine.  As I am currently troubleshooting this problem i have iptables
> set to default accept so I am relatively sure this is not the problem.
>
> again any help with this would be appreciated.
>
> Todd
> On Thu, 2010-11-18 at 13:44 -0600, r3d91ll wrote:
>> here is my ifconfig lo
>>
>> 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:483 errors:0 dropped:0 overruns:0 frame:0
>>           TX packets:483 errors:0 dropped:0 overruns:0 carrier:0
>>           collisions:0 txqueuelen:0
>>           RX bytes:53860 (52.5 KiB)  TX bytes:53860 (52.5 KiB)
>>
>>
>> just tried to run lynx against the localhost and I got the webpage.  so
>> localhost seems to be working albeit pinging the localhost doesn't.
>>
>> Strange
>> Todd
>>
>> On Thu, 2010-11-18 at 13:37 -0600, Don Wright wrote:
>> > Looks enough like mine. How about ifconfig lo? Mine shows:
>> > #ifconfig lo
>> > 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:5556 errors:0 dropped:0 overruns:0 frame:0
>> >           TX packets:5556 errors:0 dropped:0 overruns:0 carrier:0
>> >           collisions:0 txqueuelen:0
>> >           RX bytes:16510746 (15.7 MiB)  TX bytes:16510746 (15.7 MiB)
>> >
>> >
>> >
>> > r3d91ll wrote:
>> > ># This file describes the network interfaces available on your system
>> > ># and how to activate them. For more information, see interfaces(5).
>> >
>> > [[snip]]
>> > >On Thu, 2010-11-18 at 12:30 -0600, Don Wright wrote:
>> > >> What does your /etc/network/interfaces show?
>> > >>
>> > >> r3d91ll wrote:
>> > >> >spoke to soon.  I can now ping to the world via Domain name or IP
>> > >> >(without the -I switch) but I still cant ping the localhost.
>> > >> >
>> > >> >Todd
>> >
>> > --
>> > Be well - or at least have interesting symptoms!
>>
>> --
>> The information contained within the referenced, linked, or directed
>> email communication is intended to be a confidential communication
>> between the original sender and recipient, and is to be treated as
>> confidential. If you believe you have received this or any other email
>> in error, please contact r3d91ll at grandecom.net.
>>
>
> --
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> in error, please contact r3d91ll at grandecom.net.
>
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-- 
JM

/* If you haven't found something strange during the day, it hasn't
been much of a day.
-- John A. Wheeler */


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