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Re: [Openvpn-users] Arrrghhhh - what to look for in dropped UDP packets


  • Subject: Re: [Openvpn-users] Arrrghhhh - what to look for in dropped UDP packets
  • From: Bill Chmura <Bill@xxxxxxxxxxxxx>
  • Date: Wed, 15 Nov 2006 13:06:43 -0500

Verb 6 show'd not much more... verb 7 showed some new stuff in the end, 
but I am not sure it is useful...  The whole output sequence broken 
toward the end...  I searched and found the code that generates it, but 
not sure what that all means.

This is the output leading up to the ping restart




Wed Nov 15 12:13:04 2006 us=145385 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=8 DATA len=100
Wed Nov 15 12:13:04 2006 us=147105 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 8 ]
Wed Nov 15 12:13:04 2006 us=350082 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=9 DATA len=100
Wed Nov 15 12:13:04 2006 us=352266 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 9 ]
Wed Nov 15 12:13:04 2006 us=355903 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=10 DATA len=100
Wed Nov 15 12:13:04 2006 us=357641 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 10 ]
Wed Nov 15 12:13:04 2006 us=393256 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=11 DATA len=100
Wed Nov 15 12:13:04 2006 us=395321 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 11 ]
Wed Nov 15 12:13:04 2006 us=400495 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=12 DATA len=100
Wed Nov 15 12:13:04 2006 us=406797 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 12 ]
Wed Nov 15 12:13:04 2006 us=563697 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=13 DATA len=100
Wed Nov 15 12:13:04 2006 us=565681 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 13 ]
Wed Nov 15 12:13:04 2006 us=571055 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=14 DATA len=100
Wed Nov 15 12:13:04 2006 us=572913 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 14 ]
Wed Nov 15 12:13:04 2006 us=612556 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=15 DATA len=100
Wed Nov 15 12:13:04 2006 us=614372 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 15 ]
Wed Nov 15 12:13:04 2006 us=644740 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=16 DATA len=100
Wed Nov 15 12:13:04 2006 us=646782 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 16 ]
Wed Nov 15 12:13:04 2006 us=765812 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=17 DATA len=100
Wed Nov 15 12:13:04 2006 us=768103 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 17 ]
Wed Nov 15 12:13:04 2006 us=771527 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=18 DATA len=100
Wed Nov 15 12:13:04 2006 us=773280 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 18 ]
Wed Nov 15 12:13:04 2006 us=805955 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=19 DATA len=100
Wed Nov 15 12:13:04 2006 us=807883 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 19 ]
Wed Nov 15 12:13:04 2006 us=862269 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=20 DATA len=100
Wed Nov 15 12:13:04 2006 us=868098 VERIFY OK: depth=1, 
/C=US/ST=C/L=H/O=W/OU=IT/CN=stalingrad/emailAddress=bill@xxxxxxxxxxxxx
Wed Nov 15 12:13:04 2006 us=871451 VERIFY OK: depth=0, 
/C=US/ST=C/O=W/OU=IT/CN=stalingrad/emailAddress=bill@xxxxxxxxxxxxx
Wed Nov 15 12:13:04 2006 us=874639 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 20 ]
Wed Nov 15 12:13:04 2006 us=970503 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=21 DATA len=100
Wed Nov 15 12:13:04 2006 us=972702 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 21 ]
Wed Nov 15 12:13:04 2006 us=976132 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=22 DATA len=100
Wed Nov 15 12:13:04 2006 us=977883 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 22 ]
Wed Nov 15 12:13:05 2006 us=19449 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=23 DATA len=100
Wed Nov 15 12:13:05 2006 us=21284 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 23 ]
Wed Nov 15 12:13:05 2006 us=86230 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=24 DATA len=100
Wed Nov 15 12:13:05 2006 us=91859 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 24 ]
Wed Nov 15 12:13:05 2006 us=150089 UDPv4 READ [114] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=25 DATA len=100
Wed Nov 15 12:13:05 2006 us=152099 UDPv4 WRITE [22] to 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 25 ]
Wed Nov 15 12:13:05 2006 us=157470 UDPv4 READ [36] from 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=26 DATA len=22
Wed Nov 15 12:13:05 2006 us=312354 UDPv4 WRITE [126] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ 26 ] pid=2 DATA len=100
Wed Nov 15 12:13:05 2006 us=314485 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=3 DATA len=100
Wed Nov 15 12:13:05 2006 us=317905 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=4 DATA len=100
Wed Nov 15 12:13:05 2006 us=319730 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=5 DATA len=100
Wed Nov 15 12:13:05 2006 us=321118 ACK output sequence broken: [6] 2 3 4 5
Wed Nov 15 12:13:05 2006 us=592523 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 2 ]
Wed Nov 15 12:13:05 2006 us=594888 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=6 DATA len=100
Wed Nov 15 12:13:05 2006 us=598195 ACK output sequence broken: [7] 6 3 4 5
Wed Nov 15 12:13:05 2006 us=599789 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 3 ]
Wed Nov 15 12:13:05 2006 us=601156 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=7 DATA len=100
Wed Nov 15 12:13:05 2006 us=604505 ACK output sequence broken: [8] 6 7 4 5
Wed Nov 15 12:13:05 2006 us=606077 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 4 ]
Wed Nov 15 12:13:05 2006 us=607479 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=8 DATA len=100
Wed Nov 15 12:13:05 2006 us=610609 ACK output sequence broken: [9] 6 7 8 5
Wed Nov 15 12:13:05 2006 us=612912 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 5 ]
Wed Nov 15 12:13:05 2006 us=616179 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=9 DATA len=100
Wed Nov 15 12:13:05 2006 us=617879 ACK output sequence broken: [10] 6 7 8 9
Wed Nov 15 12:13:05 2006 us=855935 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 6 ]
Wed Nov 15 12:13:05 2006 us=858055 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=10 DATA len=100
Wed Nov 15 12:13:05 2006 us=861382 ACK output sequence broken: [11] 10 7 8 9
Wed Nov 15 12:13:05 2006 us=864543 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 7 ]
Wed Nov 15 12:13:05 2006 us=868164 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=11 DATA len=100
Wed Nov 15 12:13:05 2006 us=869837 ACK output sequence broken: [12] 10 
11 8 9
Wed Nov 15 12:13:05 2006 us=871264 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 8 ]
Wed Nov 15 12:13:05 2006 us=874239 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=12 DATA len=100
Wed Nov 15 12:13:05 2006 us=876671 ACK output sequence broken: [13] 10 
11 12 9
Wed Nov 15 12:13:05 2006 us=890116 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 9 ]
Wed Nov 15 12:13:05 2006 us=891897 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=13 DATA len=100
Wed Nov 15 12:13:05 2006 us=893303 ACK output sequence broken: [14] 10 
11 12 13
Wed Nov 15 12:13:06 2006 us=90025 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 10 ]
Wed Nov 15 12:13:06 2006 us=92169 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=14 DATA len=100
Wed Nov 15 12:13:06 2006 us=95479 ACK output sequence broken: [15] 14 11 
12 13
Wed Nov 15 12:13:06 2006 us=106576 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 11 ]
Wed Nov 15 12:13:06 2006 us=108316 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=15 DATA len=100
Wed Nov 15 12:13:06 2006 us=109784 ACK output sequence broken: [16] 14 
15 12 13
Wed Nov 15 12:13:06 2006 us=115189 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 12 ]
Wed Nov 15 12:13:06 2006 us=116847 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=16 DATA len=100
Wed Nov 15 12:13:06 2006 us=118270 ACK output sequence broken: [17] 14 
15 16 13
Wed Nov 15 12:13:06 2006 us=140492 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 13 ]
Wed Nov 15 12:13:06 2006 us=142429 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=17 DATA len=100
Wed Nov 15 12:13:06 2006 us=145663 ACK output sequence broken: [18] 14 
15 16 17
Wed Nov 15 12:13:06 2006 us=298329 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 14 ]
Wed Nov 15 12:13:06 2006 us=300511 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=18 DATA len=100
Wed Nov 15 12:13:06 2006 us=303755 ACK output sequence broken: [19] 18 
15 16 17
Wed Nov 15 12:13:06 2006 us=305376 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 15 ]
Wed Nov 15 12:13:06 2006 us=306925 UDPv4 WRITE [114] to 
199.xxx.xxx.xxx:2772: P_CONTROL_V1 kid=0 [ ] pid=19 DATA len=100
Wed Nov 15 12:13:06 2006 us=310042 ACK output sequence broken: [20] 18 
19 16 17
Wed Nov 15 12:13:06 2006 us=333228 UDPv4 READ [22] from 
199.xxx.xxx.xxx:2772: P_ACK_V1 kid=0 [ 16 ]



Bill Chmura wrote:
> 
> This is now seeming to be a somewhat frequent thing.  I have no idea 
> what to do for troubleshooting since I seem to have solid network 
> connections.
> 
> I am getting pressure to yank the system out and consider implementing 
> something else, which with our budget (education) will be a pretty 
> crappy setup.
> 
> Is there anything I can do?  I would appreciate any suggestions, no 
> matter how hairbrained
> 
> Bill
> 
> 
> 
> 
> 
> Ed Russell wrote:
>> This has happened to me on at least 2 occasions.  Quite odd when it does
>> occur and to date I have not found a solution for it.
>>
>> Ed
>>
>>
>> ---------------------------------------------------
>>
>>  Talk is cheap since supply always exceeds demand.
>>
>> ---------------------------------------------------
>>  
>>
>> -----Original Message-----
>> From: openvpn-users-bounces@xxxxxxxxxxxxxxxxxxxxx
>> [mailto:openvpn-users-bounces@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Bill
>> Chmura
>> Sent: Tuesday, November 14, 2006 4:02 PM
>> To: openvpn-users@xxxxxxxxxxxxxxxxxxxxx
>> Subject: [Openvpn-users] Arrrghhhh - what to look for in dropped UDP packets
>>
>>
>> This is killing me.
>>
>> I have what is now normally a nice stable OpenVPN connection.  The other 
>> day it went off kilter again with it basically just sitting there, then 
>> reconnecting (ping restart) constantly.
>>
>> Now, I had another user in another location try it and they reported no 
>> problems.  We were both watching the whole verb=5 RWRWRWRWR... he would 
>> not get resets.  I however would have something more like WRWRWRWWWWWWW 
>> boom.
>>
>> I took down the firewall I have thinking maybe that was it.  No luck, 
>> same response.
>>
>> So I ran a ping for a while to the outside interface of the server and 
>> had no lost packets.
>>
>> It was a weekend, so both systems had no use on them at all... nothing 
>> like during the week.
>>
>> The only differences are that he was on a windows client, I was on a 
>> linux and osx clients, and we were on different connections to the 
>> network (not the same provider).
>>
>> I was about to take my system to a third site on a third network and try 
>> it from there, but by the time I was ready to go it was working fine again.
>>
>> My question - what can i try, what can i do next time I have this issue? 
>>   Apparently we have a few people with this problem, but most of the 
>> time it is fine...
>>
>> I have no idea on where to start troubleshooting this next time it happens!
>>
>> TIA
>>
> 
> 
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