Date: Tue, 26 Dec 2006 21:55:46 -0800 From: "Stephan Wehner" <stephanwehner@gmail.com> To: alex@pilosoft.com Cc: freebsd-net@freebsd.org Subject: Re: Diagnose co-location networking problem Message-ID: <e66d1efb0612262155o1a9f6ac1l862bbdb9a071e42b@mail.gmail.com> In-Reply-To: <Pine.LNX.4.44.0612262211010.2698-100000@bawx.pilosoft.com> References: <e66d1efb0612261845t3da246aepfa5ba5fef4858d6a@mail.gmail.com> <Pine.LNX.4.44.0612262211010.2698-100000@bawx.pilosoft.com>
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Ok, thanks, I now ran tcpdump with -n. Here I am testing with a little script that continuously accesses one of the pages. Right at the beginning it doesn't get very far: first response after 90 seconds. What kind of DNS problem did you have in mind? Stephan $ sudo /usr/sbin/tcpdump -n host stbgo.org Password: tcpdump: listening on eth0 21:40:22.162536 192.168.2.54.35932 > 65.110.18.138.80: S 1526509984:1526509984(0) win 5840 <mss 1460,sackOK,timestamp 980 52714 0,nop,wscale 0> (DF) 21:40:25.160150 192.168.2.54.35932 > 65.110.18.138.80: S 1526509984:1526509984(0) win 5840 <mss 1460,sackOK,timestamp 980 53014 0,nop,wscale 0> (DF) 21:40:31.160150 192.168.2.54.35932 > 65.110.18.138.80: S 1526509984:1526509984(0) win 5840 <mss 1460,sackOK,timestamp 980 53614 0,nop,wscale 0> (DF) 21:40:43.160143 192.168.2.54.35932 > 65.110.18.138.80: S 1526509984:1526509984(0) win 5840 <mss 1460,sackOK,timestamp 980 54814 0,nop,wscale 0> (DF) 21:41:07.160149 192.168.2.54.35932 > 65.110.18.138.80: S 1526509984:1526509984(0) win 5840 <mss 1460,sackOK,timestamp 980 57214 0,nop,wscale 0> (DF) 21:41:55.160152 192.168.2.54.35932 > 65.110.18.138.80: S 1526509984:1526509984(0) win 5840 <mss 1460,sackOK,timestamp 980 62014 0,nop,wscale 0> (DF) 21:41:55.174033 65.110.18.138.80 > 192.168.2.54.35932: S 432853648:432853648(0) ack 1526509985 win 65535 <mss 1460,nop,ws cale 1,nop,nop,timestamp 719800431 98062014,sackOK,eol> (DF) 21:41:55.174139 192.168.2.54.35932 > 65.110.18.138.80: . ack 1 win 5840 <nop,nop,timestamp 98062015 719800431> (DF) 21:41:55.175738 192.168.2.54.35932 > 65.110.18.138.80: P 1:15(14) ack 1 win 5840 <nop,nop,timestamp 98062015 719800431> ( DF) 21:41:55.290528 65.110.18.138.80 > 192.168.2.54.35932: . ack 15 win 33304 <nop,nop,timestamp 719800549 98062015> (DF) 21:41:55.290665 192.168.2.54.35932 > 65.110.18.138.80: P 15:73(58) ack 1 win 5840 <nop,nop,timestamp 98062027 719800549> (DF) On 12/26/06, alex@pilosoft.com <alex@pilosoft.com> wrote: > On Tue, 26 Dec 2006, Stephan Wehner wrote: > > > Most of the times I find the server responds nicely. But periodically it > > doesn't respond properly when accessing its webpages: Type URL in > > browser, hit return, no page appears. Try again and again and after a > > few times it appears. > DNS. > > try tcpdump -n > > -alex > > -- Stephan Wehner > http://stephan.sugarmotor.org > http://stephansmap.org > http://www.trafficlife.com > http://www.buckmaster.ca
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