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Initial invocation of MsMpEng.exe on new PC breaks PPTP



 
 
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  #1  
Old June 20th 19, 03:16 PM posted to alt.comp.os.windows-10
Don Kuenz, KB7RPU
external usenet poster
 
Posts: 29
Default Initial invocation of MsMpEng.exe on new PC breaks PPTP

The W10's first invocation of MsMpEng.exe (Windows Defender Antivirus
Service) on a new PC uses so many resources when it initially runs that
it breaks the PPTP client through starvation of resources. After
approximately 30-60 minutes MsMpEng.exe drops lower on the Task List
and W10's PPTP client starts to work.

This anomaly was originally misdiagnosed and mistakenly attributed to
KB4503327.

Thank you, 73,

--
Don Kuenz KB7RPU
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.

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  #2  
Old June 20th 19, 10:38 PM posted to alt.comp.os.windows-10
Paul[_32_]
external usenet poster
 
Posts: 11,873
Default Initial invocation of MsMpEng.exe on new PC breaks PPTP

Don Kuenz wrote:
The W10's first invocation of MsMpEng.exe (Windows Defender Antivirus
Service) on a new PC uses so many resources when it initially runs that
it breaks the PPTP client through starvation of resources. After
approximately 30-60 minutes MsMpEng.exe drops lower on the Task List
and W10's PPTP client starts to work.

This anomaly was originally misdiagnosed and mistakenly attributed to
KB4503327.

Thank you, 73,


https://en.wikipedia.org/wiki/Point-...eling_Protocol

The Point-to-Point Tunneling Protocol (PPTP) is an obsolete method
for implementing virtual private networks.

PPTP has many well known security issues.

...tunnel to encapsulate PPP packets

It's possible this is the "rasclient", which would also
be tasked with making PPPOE termination work. PPPOE is used,
when you connect an ADSL modem (no router) directly to a
PC, so only the one PC can see the network, and there is
hardly any protection from Internet-side attacks. The telephone
company encapsulates in PPPOE (or PPPOA is an option), and
OSes have had a terminator for this for ~19 years or so.

https://blogs.technet.microsoft.com/...elated-errors/

*******

Take a look at this scheduled task design, which has a retry count,
in an attempt to wait out whatever other service(s) haven't started
yet. Perhaps "rasman" or equivalent.

https://www.downloadsource.net/how-t...indows/n/9405/

If your PPTP isn't working, I would expect to see reports
from people, that their PPPOE isn't working either. It's
possible the authentication step is failing, either
because something isn't ready, or there aren't enough
retries set up in the thing.

In the old days, PPPOE used to be able to generate a logfile,
and in that you would see the negotiation steps, the selection
of authentication protocol and so on, and you could get some
hints from that, what is failing. But for actual services
that haven't started, those are less likely to be logged
properly. Sometimes a "delayed start" is called for, if it
appears some structure needed by the thing you're doing,
doesn't actually start properly at boot time. A "delayed start",
might wait 120 seconds for the OS to settle down.

It's possible the problem isn't MSMPENG entirely, and it's
a "too aggressive" "starts too early" "VPN connector" that
isn't patient enough and doesn't have enough retries with
a sleep in between them.

Summary: Jiggle the handle...

Paul
  #3  
Old June 21st 19, 03:37 AM posted to alt.comp.os.windows-10
Don Kuenz, KB7RPU
external usenet poster
 
Posts: 29
Default Initial invocation of MsMpEng.exe on new PC breaks PPTP

Paul wrote:

snip

If your PPTP isn't working,


The builtin, native Microsoft W10P VPN PPTP client connection now works
without a hitch.

Many PC manufacturers ship factory fresh PCs with a cloned preinstall
image on the hard drive. After a factory fresh PC is powered on and
booted for the very first time the preinstall image creates a full
blown Windows OS image on the hard drive. It takes a while for that to
happen. After the process completes, the Windows OS boots for the first
time. At that point the fresh Windows install spends a fair amount of
time "getting its house in order" and it tends to display the circle of
circles AKA "circle of death."
A brand spanking new Windows install can spend a couple of days
"getting its house in order" or "polishing up" as Redmond likes to say.
Although you can logon during that period, updates and other initial
setup takes priority. It was during this pre-dawn period with a lot of
"runonce" processes in the background, that Microsoft W10P VPN PPTP
client connection failed for the first and only time.

BTW, Microsoft W10P VPN PPTP client connection works superbly to logon
to remote Domains using AD credentials from anywhere in the world "on
the fly." Redmond did good this time.

The plot thickens. It turns out that VPN servers can only handle five
concurrent VPN sessions by default. My three brand new factory fresh PCs
may have demanded one too many concurrent VPN sessions on a busy
production server.
When a connection to a totally different VPN server was attempted,
the builtin, native Microsoft W10P VPN PPTP client connection also
failed. But my patience may have been too exhausted by that point to
give it enough time to succeed.
If exhaustion of available sessions is the true culprit, then this
is yet another example of the chaos created by poor error handling
coupled with an inadequate error message. For what little good it does,
the "don't want good, want it Tuesday" mentality that pervades the
industry can be scapegoated, in this case.

BTW, anyone who knows and shares the registry key that controls
concurrent VPN sessions on Windows Server20nn, rocks.

Thank you, 73,

--
Don Kuenz KB7RPU
There was a young lady named Bright Whose speed was far faster than light;
She set out one day In a relative way And returned on the previous night.

 




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