Re: network connection enumeration

"John Smith [email protected] [win_tech_off_topic]" <[email protected]> Tue, 23 Aug 2016 10:28:29 -0500
Newsgroups gmane.comp.windows.off-topic
Message-ID <CACFVv8fNBQtG_++bGgzp978KAxCPJe_cwAqK+6xq7CBh2C4xNA@mail.gmail.com> 
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Hi Richard,
  The programs both exist. the server program is located at
\\server_name\c\directory\program.exe  a program called test.exe is located
on a machine across the network and when I run test.exe it connects to the
server, finds program.exe at the path given and sends it various commands,
sends it requests for information and interacts with it in various other
ways.
  As far as I know, program.exe is simply responding to network requests,
it doesn't actually know anything. I'm not using pipes or other IO
redirection, (unless that's how the OS is doing it, I'm not clear on that),
so I don't think monitoring for IO redirection would help here.

  Another question. How does the OS handle IO that is targeted for a remote
location? Does it actually use pipes? sockets? or something else? That
might help me figure out a solution here.



On Sat, Aug 20, 2016 at 10:42 AM, 'Richard Howells' [email protected]
[win_tech_off_topic] <[email protected]> wrote:

>
>
> >> a program on the network machine connects to the program on the server
> and sends it information,
>
> We still don=E2=80=99t know how this happens.
>
>
>
> Is this a pair of programs that already exist?  Or a pair that you plan t=
o
> write, or commission?
>
>
>
> A server program (your target program) has to know, or be able to find
> out, some information about any incoming connection.  At a minimum it nee=
ds
> to send responses back to the right place.
>
>
>
> If you tell us what the nature of the connection is you might get better
> targeted advice.
>
>
>
> Best wishes,
>
>
>
> Richard Howells
>
> Richard-yP/[email protected]
>
> www.dynamisys.co.uk
>
>
>
> (L) +44 (0) 1793 731225
>
> (M) +44 (0) 7769 266522 =E2=80=93 I=E2=80=99m working in India until 4Dec=
ember.  It=E2=80=99s
> unlikely that I will be able to take calls.  Wisest is to send me an emai=
l.
>
>
>
> *From:* [email protected] [mailto:win_tech_off_topic@
> yahoogroups.com]
> *Sent:* 20 August 2016 15:51
> *To:* [email protected]
> *Subject:* Re: [OT] network connection enumeration
>
>
>
>
>
> The network machines connect to the server that the target program is
> running on. while the target program is running, a program on the network
> machine connects to the program on the server and sends it information,
> tries to get info about the program on the server (operational state,
> determine whether the program on the server still exists, etc...)
>
>
>
> Is there a way for the program on the server to know when one of the
> programs on the network machine is accessing it? I was thinking about
> building an internal firewall into the target program on the server, but
> wouldn't that simply block or allow a connection from across the network
> based on an IP address of the network machine? Would that really be able =
to
> flag when a connection to the target program was made?
>
>
>
> On Thu, Aug 18, 2016 at 10:45 AM, Christopher Tavares
> cct-/[email protected] [win_tech_off_topic] <win_tech_off_topic@
> yahoogroups.com> wrote:
>
>
>
> OK, so you're not connecting to the app, but instead connecting to a
> network share on the same machine the app happens to be running on?
>
> That makes it really tough, those sort of things are deliberately isolate=
d
> by the OS.
>
> You might be able to do something at the device driver level? Out of my
> depth here.
>
> -Chris
>
>
>
> On Aug 18, 2016 8:38 AM, "John Smith [email protected]
> [win_tech_off_topic]" <[email protected]> wrote:
>
>
>
> Hi Guys
>
>   Thanks for the reply. I know what you mean about the lack of activity o=
n
> the list recently. It's been forever since I've seen much activity here.
> Anyway, the connection type is what ever is used by the OS to connect to =
a
> network share. As far as I know it's not specifically socketed unless the
> OS does something behind the scenes.
>
>
>
> -John
>
>
>
>
>
> On Tue, Aug 16, 2016 at 12:04 PM, Steve Johnson [email protected]
> [win_tech_off_topic] <[email protected]> wrote:
>
>
>
> There is almost never any traffic on this list. In fact, I had forgotten
> that I was still subscribed.
>
>
>
> What kind of connection are you talking about? Socket? Share?
>
>
>
> --Steve Johnson
>
>
>
>
> --Steve Johnson
>
>
>
> On Tue, Aug 16, 2016 at 10:18 AM, John Smith [email protected]
> [win_tech_off_topic] <[email protected]> wrote:
>
>
>
> Hi Guys,
>
>
>
>   is there a way to enumerate the connections to a program located on a
> network server?
>
> Here is what I have. I have a program located on my network server and
> other machines on the network connect to the server and complete various
> tasks after a connection to that program is established. Is there a way f=
or
> the program on the server to know when a connection to it has been create=
d
> by someone on the network? Thanks for any help, pointers to info etc...
>
>
>
>
>
> -John
>
>
>
>
>
>
>
>
>
>
>
>
>
>=20
>

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      <p><div dir=3D"ltr"><div>Hi Richard, </div><div>=C2=A0 The programs b=
oth exist. the server program is located at \\server_name\c\directory\<wbr>=
program.exe=C2=A0=C2=A0a program called test.exe is located on a machine ac=
ross the network and when I run test.exe it connects to the server, finds=
=C2=A0program.exe at the path given and sends it various commands, sends it=
 requests for information and interacts with it in various other ways. </di=
v><div>=C2=A0 As far as I know, program.exe is simply responding to network=
 requests, it doesn&#39;t actually know anything. I&#39;m not using pipes o=
r other IO redirection, (unless that&#39;s how the OS is doing it, I&#39;m =
not clear on that), so=C2=A0I don&#39;t think monitoring for IO redirection=
 would help here. </div><div><br></div><div>=C2=A0 Another question. How do=
es the OS handle IO that is targeted for a remote location? Does it actuall=
y use=C2=A0pipes? sockets? or something else? That might help me figure out=
 a solution here. =C2=A0</div><div><br></div><div>=C2=A0</div></div><div cl=
ass=3D"gmail_extra"><br><div class=3D"gmail_quote">On Sat, Aug 20, 2016 at =
10:42 AM, &#39;Richard Howells&#39; <a href=3D"mailto:[email protected]=
uk">[email protected]</a> [win_tech_off_topic] <span dir=3D"ltr">&lt;=
<a href=3D"mailto:[email protected]" target=3D"_blank">win=
[email protected]</a>&gt;</span> wrote:<br><blockquote class=
=3D"gmail_quote" style=3D"border-left:1px #ccc solid;">


<u></u>









=20
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<span>=C2=A0</span>


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      <p><div><span><p class=3D"MsoNormal"><span style=3D"color:rgb(31,73,1=
25);font-size:11pt;">&gt;&gt;</span> a program on the network machine conne=
cts to the program on the server and sends it information,<span style=3D"co=
lor:rgb(31,73,125);font-size:11pt;"><u></u><u></u></span></p></span><p clas=
s=3D"MsoNormal"><span style=3D"color:rgb(31,73,125);font-size:11pt;">We sti=
ll don=E2=80=99t know how this happens.=C2=A0 <u></u><u></u></span></p><p c=
lass=3D"MsoNormal"><span style=3D"color:rgb(31,73,125);font-size:11pt;"><u>=
</u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"color:rgb=
(31,73,125);font-size:11pt;">Is this a pair of programs that already exist?=
=C2=A0 Or a pair that you plan to write, or commission?<u></u><u></u></span=
></p><p class=3D"MsoNormal"><span style=3D"color:rgb(31,73,125);font-size:1=
1pt;"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNormal"><span style=3D"=
color:rgb(31,73,125);font-size:11pt;">A server program (your target program=
) has to know, or be able to find out, some information about any incoming =
connection.=C2=A0 At a minimum it needs to send responses back to the right=
 place.<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"color=
:rgb(31,73,125);font-size:11pt;"><u></u>=C2=A0<u></u></span></p><p class=3D=
"MsoNormal"><span style=3D"color:rgb(31,73,125);font-size:11pt;">If you tel=
l us what the nature of the connection is you might get better targeted adv=
ice.<u></u><u></u></span></p><span><p class=3D"MsoNormal"><span style=3D"co=
lor:rgb(31,73,125);font-size:11pt;"><u></u>=C2=A0<u></u></span></p><div><p =
class=3D"MsoNormal"><span style=3D"color:rgb(31,73,125);font-size:11pt;">Be=
st wishes,<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"co=
lor:rgb(31,73,125);font-size:11pt;"><u></u>=C2=A0<u></u></span></p><p class=
=3D"MsoNormal"><span style=3D"color:rgb(31,73,125);font-size:11pt;">Richard=
 Howells<u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"colo=
r:rgb(31,73,125);font-size:11pt;"><a href=3D"mailto:Richard-yP/[email protected]=
" target=3D"_blank"><span style=3D"color:blue;">Richard-yP/[email protected]</sp=
an></a><u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"color=
:rgb(31,73,125);font-size:11pt;"><a href=3D"http://www.dynamisys.co.uk/" ta=
rget=3D"_blank"><span style=3D"color:blue;">www.dynamisys.co.uk</span></a><=
u></u><u></u></span></p><p class=3D"MsoNormal"><span style=3D"color:rgb(31,=
73,125);font-size:11pt;"><u></u>=C2=A0<u></u></span></p><p class=3D"MsoNorm=
al"><span style=3D"color:rgb(31,73,125);font-size:11pt;">(L) <a href=3D"tel=
:%2B44%20%280%29%201793%20731225" target=3D"_blank" value=3D"+441793731225"=
>&#43;44 (0) 1793 731225</a><u></u><u></u></span></p><p class=3D"MsoNormal"=
><span style=3D"color:rgb(31,73,125);font-size:11pt;">(M) <a href=3D"tel:%2=
B44%20%280%29%207769%20266522" target=3D"_blank" value=3D"+447769266522">&#=
43;44 (0) 7769 266522</a> =E2=80=93 I=E2=80=99m working in India until 4Dec=
ember.=C2=A0 It=E2=80=99s unlikely that I will be able to take calls.=C2=A0=
 Wisest is to send me an email.<u></u><u></u></span></p></div><p class=3D"M=
soNormal"><span style=3D"color:rgb(31,73,125);font-size:11pt;"><u></u>=C2=
=A0<u></u></span></p></span><div><div style=3D"padding:3pt 0cm 0cm;border-t=
op-color:rgb(181,196,223);border-top-width:1pt;border-top-style:solid;"><p =
class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10pt;">From:=
</span></b><span lang=3D"EN-US" style=3D"font-size:10pt;"> <a href=3D"mailt=
o:[email protected]" target=3D"_blank">win_tech_off_topic@=
<wbr>yahoogroups.com</a> [mailto:<a href=3D"mailto:win_tech_off_topic@yahoo=
groups.com" target=3D"_blank">win_tech_off_topic@<wbr>yahoogroups.com</a>] =
<br><b>Sent:</b> 20 August 2016 15:51<span><br><b>To:</b> <a href=3D"mailto=
:[email protected]" target=3D"_blank">win_tech_off_topic@<=
wbr>yahoogroups.com</a><br><b>Subject:</b> Re: [OT] network connection enum=
eration<u></u><u></u></span></span></p></div></div><p class=3D"MsoNormal"><=
u></u>=C2=A0<u></u></p><p class=3D"MsoNormal">=C2=A0 <u></u><u></u></p><div=
><div><div><div><div><p class=3D"MsoNormal">The network machines connect to=
 the server that the target program is running on. while the target program=
 is running, a program on the network machine connects to the program on th=
e server and sends it information, tries to get info about the program on t=
he server (operational state, determine whether the program on the server s=
till exists, etc...) <u></u><u></u></p></div><span><div><p class=3D"MsoNorm=
al"><u></u>=C2=A0<u></u></p></div><div><p class=3D"MsoNormal">Is there a wa=
y for the program on the server to know when one of the programs on the net=
work machine is accessing it? I was thinking about building an internal fir=
ewall into the target program on the server, but wouldn&#39;t that simply b=
lock or allow a connection from across the network based on an IP address o=
f the network machine? Would that really be able to flag when a connection =
to the target program was made? <u></u><u></u></p></div></span></div><span>=
<div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p><div><p class=3D"MsoNor=
mal">On Thu, Aug 18, 2016 at 10:45 AM, Christopher Tavares <a href=3D"mailt=
o:cct-/[email protected]" target=3D"_blank">cct-/[email protected]</a> [win=
_tech_off_topic] &lt;<a href=3D"mailto:[email protected]" =
target=3D"_blank">win_tech_off_topic@<wbr>yahoogroups.com</a>&gt; wrote:<u>=
</u><u></u></p><div><p class=3D"MsoNormal" style=3D"background:white;">=C2=
=A0 <u></u><u></u></p><div><div><div><p style=3D"background:white;">OK, so =
you&#39;re not connecting to the app, but instead connecting to a network s=
hare on the same machine the app happens to be running on?<u></u><u></u></p=
><p style=3D"background:white;">That makes it really tough, those sort of t=
hings are deliberately isolated by the OS.<u></u><u></u></p><p style=3D"bac=
kground:white;">You might be able to do something at the device driver leve=
l? Out of my depth here.<u></u><u></u></p><p style=3D"background:white;">-C=
hris<u></u><u></u></p><div><p class=3D"MsoNormal" style=3D"background:white=
;"><u></u>=C2=A0<u></u></p><div><p class=3D"MsoNormal" style=3D"background:=
white;">On Aug 18, 2016 8:38 AM, &quot;John Smith <a href=3D"mailto:js51107=
@gmail.com" target=3D"_blank">[email protected]</a> [win_tech_off_topic]&qu=
ot; &lt;<a href=3D"mailto:[email protected]" target=3D"_bl=
ank">win_tech_off_topic@<wbr>yahoogroups.com</a>&gt; wrote:<u></u><u></u></=
p><div><p class=3D"MsoNormal" style=3D"background:white;">=C2=A0 <u></u><u>=
</u></p><div><div><div><div><div><p class=3D"MsoNormal" style=3D"background=
:white;">Hi Guys<u></u><u></u></p></div><div><p class=3D"MsoNormal" style=
=3D"background:white;">=C2=A0 Thanks for the reply. I know what you mean ab=
out the lack of activity on the list recently. It&#39;s been forever since =
I&#39;ve seen much activity here. Anyway, the connection type is what ever =
is used by the OS to connect to a network share. As far as I know it&#39;s =
not specifically socketed unless the OS does something behind the scenes. <=
u></u><u></u></p></div><div><p class=3D"MsoNormal" style=3D"background:whit=
e;"><u></u>=C2=A0<u></u></p></div><div><p class=3D"MsoNormal" style=3D"back=
ground:white;">-John<u></u><u></u></p></div><div><p class=3D"MsoNormal" sty=
le=3D"background:white;"><u></u>=C2=A0<u></u></p></div></div><div><p class=
=3D"MsoNormal" style=3D"background:white;"><u></u>=C2=A0<u></u></p><div><p =
class=3D"MsoNormal" style=3D"background:white;">On Tue, Aug 16, 2016 at 12:=
04 PM, Steve Johnson <a href=3D"mailto:[email protected]" target=3D"_blan=
k">[email protected]</a> [win_tech_off_topic] &lt;<a href=3D"mailto:win_t=
[email protected]" target=3D"_blank">win_tech_off_topic@<wbr>ya=
hoogroups.com</a>&gt; wrote:<u></u><u></u></p><div><p class=3D"MsoNormal" s=
tyle=3D"background:white;">=C2=A0 <u></u><u></u></p><div><div><div><div><di=
v><p class=3D"MsoNormal" style=3D"background:white;"><span>There is almost =
never any traffic on this list. In fact, I had forgotten that I was still s=
ubscribed.<u></u><u></u></span></p></div><div><p class=3D"MsoNormal" style=
=3D"background:white;"><span><u></u>=C2=A0<u></u></span></p></div><div><p c=
lass=3D"MsoNormal" style=3D"background:white;"><span>What kind of connectio=
n are you talking about? Socket? Share?<u></u><u></u></span></p></div><div>=
<p class=3D"MsoNormal" style=3D"background:white;"><span><u></u>=C2=A0<u></=
u></span></p></div><div><p class=3D"MsoNormal" style=3D"background:white;">=
<span>--Steve Johnson<u></u><u></u></span></p></div></div><div><p class=3D"=
MsoNormal" style=3D"background:white;"><br clear=3D"all"><u></u><u></u></p>=
<div><div><div><div><div><p class=3D"MsoNormal" style=3D"background:white;"=
><u></u>=C2=A0<u></u></p></div><div><p class=3D"MsoNormal" style=3D"backgro=
und:white;">--Steve Johnson<u></u><u></u></p></div></div></div></div></div>=
<div><div><p class=3D"MsoNormal" style=3D"background:white;"><u></u>=C2=A0<=
u></u></p><div><p class=3D"MsoNormal" style=3D"background:white;">On Tue, A=
ug 16, 2016 at 10:18 AM, John Smith <a href=3D"mailto:[email protected]" ta=
rget=3D"_blank">[email protected]</a> [win_tech_off_topic] &lt;<a href=3D"m=
ailto:[email protected]" target=3D"_blank">win_tech_off_to=
pic@<wbr>yahoogroups.com</a>&gt; wrote:<u></u><u></u></p><div><p class=3D"M=
soNormal" style=3D"background:white;margin-bottom:12pt;"><u></u>=C2=A0<u></=
u></p><div><div><p class=3D"MsoNormal" style=3D"background:white;">Hi Guys,=
<u></u><u></u></p></div><div><p class=3D"MsoNormal" style=3D"background:whi=
te;"><u></u>=C2=A0<u></u></p></div><div><p class=3D"MsoNormal" style=3D"bac=
kground:white;">=C2=A0 is there a way to enumerate the connections to a pro=
gram located on a network server? <u></u><u></u></p></div><div><p class=3D"=
MsoNormal" style=3D"background:white;">Here is what I have. I have a progra=
m located on my network server and other machines on the network connect to=
 the server and complete various tasks after a connection to that program i=
s established. Is there a way for the program on the server to know when a =
connection to it has been created by someone on the network? Thanks for any=
 help, pointers to info etc...<u></u><u></u></p></div><div><p class=3D"MsoN=
ormal" style=3D"background:white;"><u></u>=C2=A0<u></u></p></div><div><p cl=
ass=3D"MsoNormal" style=3D"background:white;"><u></u>=C2=A0<u></u></p></div=
><div><p class=3D"MsoNormal" style=3D"background:white;">-John <u></u><u></=
u></p></div><div><p class=3D"MsoNormal" style=3D"background:white;"><u></u>=
=C2=A0<u></u></p></div></div><p class=3D"MsoNormal" style=3D"background:whi=
te;margin-bottom:12pt;"><u></u>=C2=A0<u></u></p></div></div><p class=3D"Mso=
Normal" style=3D"background:white;"><u></u>=C2=A0<u></u></p></div></div></d=
iv></div></div></div></div></div><p class=3D"MsoNormal" style=3D"background=
:white;"><u></u>=C2=A0<u></u></p></div></div></div></div></div></div><p cla=
ss=3D"MsoNormal" style=3D"background:white;"><u></u>=C2=A0<u></u></p></div>=
</div></div></div></div></div><p class=3D"MsoNormal"><u></u>=C2=A0<u></u></=
p></div></span></div><div><p class=3D"MsoNormal"><span style=3D"color:white=
;"><u></u><u></u></span></p></div></div></div></div><p></p>

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        Posted by: John Smith &lt;[email protected]&gt;        <hr style=3D=
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