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Next: Mapped network connection dropped
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External
Since: Jul 26, 2006
Posts: 6
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(Msg. 1) Posted: Wed Jul 26, 2006 8:32 am
Post subject: TCP Resets
Archived from groups: microsoft>public>windows>server>networking (more info?)
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Hello all !
I posted this in the AD forum yesterday, but got no responses, so I'm
going to post here too....sorry for the dual post...but we see this most
often from our AD Domain Controllers.
What we are seeing is a large number of TCP resets (see below) coming
from our AD Domain Controllers, talking to clients. We kind of expect
this to be a FIN-ACK instead of a reset. Any thoughts? Is this
“normal”? If so, why?
BTW...Looks like is it's doing Kerberos over TCP
SUMMARY: TCP: Ack Seq#=55975276 Ack#=535452271 Win=0
Frame 5448 at 27.570707013: (60 Bytes)
AD63:88 --> P8675309:1449
Network Error:TCP Reset
Sequence Number = 55975276 (0 byte)
Acknowledgement Number = 535452271
Window Size = 0
Thanks !
Geoff |
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External
Since: Jul 26, 2006
Posts: 6
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(Msg. 2) Posted: Fri Jul 28, 2006 7:27 am
Post subject: Re: TCP Resets [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Thanks for the info....I'll check, and post back
TAce Fekay [MVP] wrote:
> In news:%23eBPufLsGHA.4896@TK2MSFTNGP03.phx.gbl,
> Geoff stated, which I commented on below:
>> Hello all !
>>
>> I posted this in the AD forum yesterday, but got no responses, so I'm
>> going to post here too....sorry for the dual post...but we see this
>> most often from our AD Domain Controllers.
>>
>> What we are seeing is a large number of TCP resets (see below) coming
>> from our AD Domain Controllers, talking to clients. We kind of expect
>> this to be a FIN-ACK instead of a reset. Any thoughts? Is this
>> “normal”? If so, why?
>>
>> BTW...Looks like is it's doing Kerberos over TCP
>>
>> SUMMARY: TCP: Ack Seq#=55975276 Ack#=535452271 Win=0
>> Frame 5448 at 27.570707013: (60 Bytes)
>> AD63:88 --> P8675309:1449
>> Network Error:TCP Reset
>> Sequence Number = 55975276 (0 byte)
>> Acknowledgement Number = 535452271
>> Window Size = 0
>>
>>
>> Thanks !
>> Geoff
>
> I can'
> t say if this is normal or not, but it doesn't appear correct, since you
> mentioned Kerberos using TCP. I know Kerberos uses UDP 88, so I can't answer
> you there, and I have not captured traffic to view this, unless someone else
> can chime in on that.
>
> Do any of the packets show Kerberos using UDP first, then try TCP? Is this
> client to domain controller traffic across a WAN? Any 3rd party spyware, or
> antivirus with security features installed?
>
> Do any of the routers (assuming going across a router) have the MTUs altered
> or going across a NAT device with multiple internal interfaces? Either one
> will affect LDAP traffic. LDAP requires the MTU to be 1500, and if a NAT has
> multiple internal interfaces, to disable H.323 |
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External
Since: Mar 29, 2006
Posts: 69
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(Msg. 3) Posted: Mon Jul 31, 2006 12:19 am
Post subject: Re: TCP Resets [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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In news:O2cs6EksGHA.4752@TK2MSFTNGP02.phx.gbl,
Geoff stated, which I commented on below:
> Thanks for the info....I'll check, and post back
Looking forward to your post.
Ace >> Stay informed about: TCP Resets |
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External
Since: Jul 26, 2006
Posts: 6
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(Msg. 4) Posted: Mon Jul 31, 2006 7:53 am
Post subject: Re: TCP Resets [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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I haven't been able to gather any new data yet...busy week 
Ace Fekay [MVP] wrote:
> In news:O2cs6EksGHA.4752@TK2MSFTNGP02.phx.gbl,
> Geoff stated, which I commented on below:
>> Thanks for the info....I'll check, and post back
>
> Looking forward to your post.
>
> Ace
>
> >> Stay informed about: TCP Resets |
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External
Since: Mar 29, 2006
Posts: 69
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(Msg. 5) Posted: Mon Aug 07, 2006 12:39 am
Post subject: Re: TCP Resets [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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In news:%23VkODBKtGHA.4472@TK2MSFTNGP02.phx.gbl,
Geoff stated, which I commented on below:
> I haven't been able to gather any new data yet...busy week
Whenever is fine...
 >> Stay informed about: TCP Resets |
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