[8.172][QUESTION][ANSWERED] Ping works after 10seconds?

Hi there,

i have a real strange problem...

if i ping for example heise online - IT-News, c't, iX, Technology Review, Telepolis the ping starts imediatly, if i ping a internal hostname,
it tooks over 10 sekonds for the ping to start. If i ping the ip address, it pings again imediatly.

I'm for example not able to send ctrl-c to the ping command:

firewall:/root # ping vmware.ducktales.net
PING vmware.ducktales.net (10.10.10.80) 56(84) bytes of data.
^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C^C64 bytes from 10.10.10.80: icmp_seq=1 ttl=64 time=0.783 ms

--- vmware.ducktales.net ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.783/0.783/0.783/0.000 ms
firewall:/root #

it's like if the ping command runns in a timeout, but i don't understand why, dns is resolving in less than a second, does anyone have a idea?

I restarted my complete equipment inkl. all routers...

here is the same ping with an strace:

Robert

0 Robert Tausend over 13 years ago

Update:

if i add a fixed host in the DNS of my ASG, it works, so what could be the problem as a nslookup works perfect?

Robert
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0 Astaro Beta Bot over 13 years ago

Astaro Beta Report
--------------------------------
Version: 8.172
Type: QUESTION
State: ANSWERED
Reporter: Robert Tausend
Contributor: 
MantisID: 
Target version: 
Fixed in version: 
--------------------------------

0 67ef1d over 13 years ago in reply to Robert Tausend

Update:

if i add a fixed host in the DNS of my ASG, it works, so what could be the problem as a nslookup works perfect?

ping also performs a reverse dns lookup on the reply IP address.
This is also visible in your strace output,:
sendmsg(3, {msg_name(16)={sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("10.10.10.80")
-> this is the echo request
recvmsg(3, ... -> this is the reply
Then /etc/hosts is inspected, but does not find a suitable ip->name mapping
so DNS is tried:
socket(PF_INET, 0x802 /* SOCK_??? */, IPPROTO_IP) = 4
[..]
poll([{fd=4, events=POLLIN}], 1, 5000) = 0 (Timeout)
.. and does not receive an answer within 5 seconds.

Either fix reverese DNS or use "ping -n".
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0 Robert Tausend over 13 years ago

Hi,

but my dns was working at this time, tried with dig and nslookup

Robert
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0 BarryG over 13 years ago

Did you test REVERSE dns?

Barry
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0 Robert Tausend over 13 years ago

Hi Barry,

shure i did, it worked!
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