coop@cooperfriends.com coop@cooperfriends.com [hercules-390]
2017-04-13 21:41:02 UTC
Sent from my LG Optimus G Proâ¢, an AT&T 4G LTE smartphone
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From:
Date: Thu, Apr 13, 2017 4:12 PM
To: hercules-***@yahoogroups.com;
Subject:[hercules-390] Digest Number 7261
Discussion group for users of the Hercules ESA/390 mainframe emulator Group
15 Messages
Digest #7261
1.1
Re: TCP port 3505 is popular for a card reader - Any other programs by "Buddy Bell" hhbell370
1.2
Re: TCP port 3505 is popular for a card reader - Any other programs by "Tony Harminc" tzha1
1.3
Re: TCP port 3505 is popular for a card reader - Any other programs by ""Fish" (David B. Trout)" fish_hercules
1.4
Re: TCP port 3505 is popular for a card reader - Any other programs by "John P. Hartmann"
1.5
Re: TCP port 3505 is popular for a card reader - Any other programs by "Harold Grovesteen" ipguynow
1.6
Re: TCP port 3505 is popular for a card reader - Any other programs by "John P. Hartmann"
1.7
Re: TCP port 3505 is popular for a card reader - Any other programs by "Ivan Warren" ivan_warhead_real
1.8
Re: TCP port 3505 is popular for a card reader - Any other programs by "Maarten Hoes" hoes.maarten
1.9
Re: TCP port 3505 is popular for a card reader - Any other programs by "Harold Grovesteen" ipguynow
1.10
Re: TCP port 3505 is popular for a card reader - Any other programs by "John P. Hartmann"
2a
TN3270 emulation and code pages by ***@gmail.com
2b
Re: TN3270 emulation and code pages by "John P. Hartmann"
2c
Re: TN3270 emulation and code pages by ""Fish" (David B. Trout)" fish_hercules
2d
Re: TN3270 emulation and code pages by "Ivan Warren" ivan_warhead_real
2e
Re: TN3270 emulation and code pages by "John P. Hartmann"
Messages
1.1
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 7:04 am (PDT) . Posted by:
"Buddy Bell" hhbell370
From the OP:
Turned out to be my fault. My GUI uses java and connecting to the card
reader I did:
Socket sock = new Socket("127.0.0.1",3505);
OutputStream os = sock.getOutputStream();
Then I wrote (with os.write(buf);) the card file to the reader.
When I went to close I only did.
os.close();
Never explicitly using:
sock.close();
When I added that last close to my code it worked fine. What I don't
understand is I have sold hundreds of my GUI without that last close
statement in there and nobody else ever had an issue with it. It is
possible the customer was using an older version of Java that behaved
differently. I seem to remember seeing documentation than when you close
the outputstream the underlying socket also gets closed but that may not
have always true in prior Java versions.
Thanks for all the input.
Buddy Bell
1.2
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 9:49 am (PDT) . Posted by:
"Tony Harminc" tzha1
and drawing inferences from what it sees. A firewall may be capable of
inferring the existence of a logical UDP session between endpoints, just as
the NSA infers the existence of connections between putative terrorists.
Whether the inferences reflect reality or are fabrications of doubtful
accuracy, varies in both cases. And just as the terrorists may take action
to obscure their activities, so application programs (by no means all of
which are malicious) using UDP may take actions to make their "sessions";
unnoticed by the firewall.
Tony H.
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1.3
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:07 pm (PDT) . Posted by:
""Fish" (David B. Trout)" fish_hercules
--
"Fish" (David B. Trout)
Software Development Laboratories
http://www.softdevlabs.com
mail: ***@softdevlabs.com
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1.4
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:18 pm (PDT) . Posted by:
"John P. Hartmann"
Please take your sexual preference elsewhere.
On 04/13/2017 08:59 PM, ''Fish' (David B. Trout)'
1.5
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:18 pm (PDT) . Posted by:
"Harold Grovesteen" ipguynow
Harold Grovesteen
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1.6
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:29 pm (PDT) . Posted by:
"John P. Hartmann"
Harold, secure ftp (SFTP) is tunnelled through a TCP connexion to port
22 (encrypted). You have to open port 22 in your firewall if you wish
that inbound.
1.7
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:33 pm (PDT) . Posted by:
"Ivan Warren" ivan_warhead_real
--Ivan
[Non-text portions of this message have been removed]
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1.8
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:36 pm (PDT) . Posted by:
"Maarten Hoes" hoes.maarten
Hi,
Harold Grovesteen
Got it. (although, as pointed out, the particular protocol chosen here as
an example may not be correct ?).
Which, by the way, brings us right back to the initial "UDP is a
connection-less protocol" statement that started the discussion and
derailed this fine thread here.
;)
- Maarten
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1.9
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:39 pm (PDT) . Posted by:
"Harold Grovesteen" ipguynow
On Thu, 2017-04-13 at 21:21 +0200, 'John P. Hartmann'
uses UDP. The "connection" is managed by the client and server
applications.
I should have learned by now not to trust my memory. :-).
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1.10
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:56 pm (PDT) . Posted by:
"John P. Hartmann"
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2a
TN3270 emulation and code pages
Thu Apr 13, 2017 12:53 pm (PDT) . Posted by:
***@gmail.com
Does the CODEPAGE configuration option has any impact on how data entered via the keyboard is displayed on the screen when connecting to Hercules via a 3270 emulation client like C3270 or QWS3270 ?
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2b
Re: TN3270 emulation and code pages
Thu Apr 13, 2017 12:58 pm (PDT) . Posted by:
"John P. Hartmann"
The data transmitted "on the wire" is EBCDIC; code page is a client issue.
On 04/13/2017 09:53 PM,
2c
Re: TN3270 emulation and code pages
Thu Apr 13, 2017 1:06 pm (PDT) . Posted by:
""Fish" (David B. Trout)" fish_hercules
The data Hercules receives from the TN3270 client is ASCII and must be translated to EBCDIC before passing it on to the guest. When the guest then decides to write something to its 3270 device, the data "received" by Hercules must then be translated from EBCDIC back into ASCII again before being transmitted to the TN3270 client. Your chosen Hercules CODEPAGE is used for both.
--
"Fish" (David B. Trout)
Software Development Laboratories
http://www.softdevlabs.com
mail: ***@softdevlabs.com
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2d
Re: TN3270 emulation and code pages
Thu Apr 13, 2017 1:08 pm (PDT) . Posted by:
"Ivan Warren" ivan_warhead_real
It shouldn't. Keyboard output on a 3270 terminal is purely a local
matter. Hercules is only involved when an AID key is pressed.
--Ivan
[Non-text portions of this message have been removed]
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2e
Re: TN3270 emulation and code pages
Thu Apr 13, 2017 1:12 pm (PDT) . Posted by:
"John P. Hartmann"
Not correct.
The data in a TN3270 session is EBCDIC, a 3270 data stream.
A TN session (typewriter) is, of course another kettle of fish.
On 04/13/2017 10:05 PM, ''Fish' (David B. Trout)'
***@gmail.com [hercules-390] wrote:
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------ Original message------
From:
Date: Thu, Apr 13, 2017 4:12 PM
To: hercules-***@yahoogroups.com;
Subject:[hercules-390] Digest Number 7261
Discussion group for users of the Hercules ESA/390 mainframe emulator Group
15 Messages
Digest #7261
1.1
Re: TCP port 3505 is popular for a card reader - Any other programs by "Buddy Bell" hhbell370
1.2
Re: TCP port 3505 is popular for a card reader - Any other programs by "Tony Harminc" tzha1
1.3
Re: TCP port 3505 is popular for a card reader - Any other programs by ""Fish" (David B. Trout)" fish_hercules
1.4
Re: TCP port 3505 is popular for a card reader - Any other programs by "John P. Hartmann"
1.5
Re: TCP port 3505 is popular for a card reader - Any other programs by "Harold Grovesteen" ipguynow
1.6
Re: TCP port 3505 is popular for a card reader - Any other programs by "John P. Hartmann"
1.7
Re: TCP port 3505 is popular for a card reader - Any other programs by "Ivan Warren" ivan_warhead_real
1.8
Re: TCP port 3505 is popular for a card reader - Any other programs by "Maarten Hoes" hoes.maarten
1.9
Re: TCP port 3505 is popular for a card reader - Any other programs by "Harold Grovesteen" ipguynow
1.10
Re: TCP port 3505 is popular for a card reader - Any other programs by "John P. Hartmann"
2a
TN3270 emulation and code pages by ***@gmail.com
2b
Re: TN3270 emulation and code pages by "John P. Hartmann"
2c
Re: TN3270 emulation and code pages by ""Fish" (David B. Trout)" fish_hercules
2d
Re: TN3270 emulation and code pages by "Ivan Warren" ivan_warhead_real
2e
Re: TN3270 emulation and code pages by "John P. Hartmann"
Messages
1.1
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 7:04 am (PDT) . Posted by:
"Buddy Bell" hhbell370
From the OP:
Turned out to be my fault. My GUI uses java and connecting to the card
reader I did:
Socket sock = new Socket("127.0.0.1",3505);
OutputStream os = sock.getOutputStream();
Then I wrote (with os.write(buf);) the card file to the reader.
When I went to close I only did.
os.close();
Never explicitly using:
sock.close();
When I added that last close to my code it worked fine. What I don't
understand is I have sold hundreds of my GUI without that last close
statement in there and nobody else ever had an issue with it. It is
possible the customer was using an older version of Java that behaved
differently. I seem to remember seeing documentation than when you close
the outputstream the underlying socket also gets closed but that may not
have always true in prior Java versions.
Thanks for all the input.
Buddy Bell
Hi,
On Thu, Apr 13, 2017 at 12:58 PM, 'John P. Hartmann'
Maarten,
bind() fails with EADDRINUSE, long before listen() is set up
for the
port.
Perhaps you got confused by the quintuple that defines a TCP
session.
Perhaps I have gotten confused. It's been a while since I last took a
real look at the workings of TCP.
;)
I have to agree with you that (even though I'm not a developer) when
the TCP port is already in use, that (most likely, again, I'm no dev)
it's 'bind()39; that fails with 'EADDRINUSE39;. I guess the point I was
trying to make was that the most likely cause for the port being in
use, is that 'malware/trojan/virus39; is listening on that port
preventing it's use by Hercules, and not that the OP has run out of
dynamic/ephemeral ports to assign.
I'll crawl back under my rock now.
- Maarten
Reply to sender . Reply to group . Reply via Web Post . All Messages (32) . Top ^On Thu, Apr 13, 2017 at 12:58 PM, 'John P. Hartmann'
Maarten,
bind() fails with EADDRINUSE, long before listen() is set up
for the
port.
Perhaps you got confused by the quintuple that defines a TCP
session.
Perhaps I have gotten confused. It's been a while since I last took a
real look at the workings of TCP.
;)
I have to agree with you that (even though I'm not a developer) when
the TCP port is already in use, that (most likely, again, I'm no dev)
it's 'bind()39; that fails with 'EADDRINUSE39;. I guess the point I was
trying to make was that the most likely cause for the port being in
use, is that 'malware/trojan/virus39; is listening on that port
preventing it's use by Hercules, and not that the OP has run out of
dynamic/ephemeral ports to assign.
I'll crawl back under my rock now.
- Maarten
1.2
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 9:49 am (PDT) . Posted by:
"Tony Harminc" tzha1
Not correct. Ask any firewall that supports VPN.
A firewall is, like the NSA, in the business of observing the flow of dataJohn,
Well... You did say "TCP" session, and there is no such thing as an UDP
session (UDP is a connection-less protocol) !
Well... You did say "TCP" session, and there is no such thing as an UDP
session (UDP is a connection-less protocol) !
and drawing inferences from what it sees. A firewall may be capable of
inferring the existence of a logical UDP session between endpoints, just as
the NSA infers the existence of connections between putative terrorists.
Whether the inferences reflect reality or are fabrications of doubtful
accuracy, varies in both cases. And just as the terrorists may take action
to obscure their activities, so application programs (by no means all of
which are malicious) using UDP may take actions to make their "sessions";
unnoticed by the firewall.
Tony H.
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1.3
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:07 pm (PDT) . Posted by:
""Fish" (David B. Trout)" fish_hercules
Maarten,
If your system is a Windows system, I should tend to agree
with you that it is likely full of vira and trojans.
Fuck you, John. Your implication that the system some people use is likely infested with malware simply because that system happens to be Windows is not only untrue but also quite insulting. Your haughty and snobbish attitude and continued disrespect towards Windows user is not appreciated.If your system is a Windows system, I should tend to agree
with you that it is likely full of vira and trojans.
--
"Fish" (David B. Trout)
Software Development Laboratories
http://www.softdevlabs.com
mail: ***@softdevlabs.com
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1.4
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:18 pm (PDT) . Posted by:
"John P. Hartmann"
Please take your sexual preference elsewhere.
On 04/13/2017 08:59 PM, ''Fish' (David B. Trout)'
Fuck you, John.
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Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:18 pm (PDT) . Posted by:
"Harold Grovesteen" ipguynow
Hi,
On Thu, Apr 13, 2017 at 2:19 PM, 'John P. Hartmann'
You can use sendto() on a UDP soclket to send to anyone, or
you can bind
the socket and use send(). In that sense, it is a session,
though it is
maintained in userland.
So, would I then be correct to assume that the UDP protocol itself
does not maintain a 'session39; for you, but the same effect may be
reached at the application level (and the need to do so at the
application level is because it is not done at the UDP protocol
level) ?
A firewall recognizes the UDP packet that starts a request
(for some
protocols) and allows a response to travel in for some fixed
time.
So the reason the firewall has to do this (using internal logic and/or
analysis of the protocol running on top of UDP) is because it's not
included in the UDP protocol ?
- Maarten
Correct. Think SFTP.On Thu, Apr 13, 2017 at 2:19 PM, 'John P. Hartmann'
You can use sendto() on a UDP soclket to send to anyone, or
you can bind
the socket and use send(). In that sense, it is a session,
though it is
maintained in userland.
So, would I then be correct to assume that the UDP protocol itself
does not maintain a 'session39; for you, but the same effect may be
reached at the application level (and the need to do so at the
application level is because it is not done at the UDP protocol
level) ?
A firewall recognizes the UDP packet that starts a request
(for some
protocols) and allows a response to travel in for some fixed
time.
So the reason the firewall has to do this (using internal logic and/or
analysis of the protocol running on top of UDP) is because it's not
included in the UDP protocol ?
- Maarten
Harold Grovesteen
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1.6
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:29 pm (PDT) . Posted by:
"John P. Hartmann"
Harold, secure ftp (SFTP) is tunnelled through a TCP connexion to port
22 (encrypted). You have to open port 22 in your firewall if you wish
that inbound.
Correct. Think SFTP.
Reply to sender . Reply to group . Reply via Web Post . All Messages (32) . Top ^1.7
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:33 pm (PDT) . Posted by:
"Ivan Warren" ivan_warhead_real
Harold, secure ftp (SFTP) is tunnelled through a TCP connexion to port
22 (encrypted). You have to open port 22 in your firewall if you wish
that inbound.
I think he meant TFTP (not STFP).22 (encrypted). You have to open port 22 in your firewall if you wish
that inbound.
Correct. Think SFTP.
--Ivan
[Non-text portions of this message have been removed]
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1.8
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:36 pm (PDT) . Posted by:
"Maarten Hoes" hoes.maarten
Hi,
Hi,
On Thu, Apr 13, 2017 at 2:19 PM, 'John P. Hartmann'
You can use sendto() on a UDP soclket to send to anyone, or
you can bind
the socket and use send(). In that sense, it is a session,
though it is
maintained in userland.
So, would I then be correct to assume that the UDP protocol itself
does not maintain a 'session39; for you, but the same effect may be
reached at the application level (and the need to do so at the
application level is because it is not done at the UDP protocol
level) ?
A firewall recognizes the UDP packet that starts a request
(for some
protocols) and allows a response to travel in for some fixed
time.
So the reason the firewall has to do this (using internal logic and/or
analysis of the protocol running on top of UDP) is because it's not
included in the UDP protocol ?
- Maarten
Correct. Think SFTP.On Thu, Apr 13, 2017 at 2:19 PM, 'John P. Hartmann'
You can use sendto() on a UDP soclket to send to anyone, or
you can bind
the socket and use send(). In that sense, it is a session,
though it is
maintained in userland.
So, would I then be correct to assume that the UDP protocol itself
does not maintain a 'session39; for you, but the same effect may be
reached at the application level (and the need to do so at the
application level is because it is not done at the UDP protocol
level) ?
A firewall recognizes the UDP packet that starts a request
(for some
protocols) and allows a response to travel in for some fixed
time.
So the reason the firewall has to do this (using internal logic and/or
analysis of the protocol running on top of UDP) is because it's not
included in the UDP protocol ?
- Maarten
Harold Grovesteen
an example may not be correct ?).
Which, by the way, brings us right back to the initial "UDP is a
connection-less protocol" statement that started the discussion and
derailed this fine thread here.
;)
- Maarten
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1.9
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:39 pm (PDT) . Posted by:
"Harold Grovesteen" ipguynow
On Thu, 2017-04-13 at 21:21 +0200, 'John P. Hartmann'
Harold, secure ftp (SFTP) is tunnelled through a TCP connexion to port
22 (encrypted). You have to open port 22 in your firewall if you wish
that inbound.
Sorry, I was thinking TFTP. RFC 753. A file transfer protocol that22 (encrypted). You have to open port 22 in your firewall if you wish
that inbound.
uses UDP. The "connection" is managed by the client and server
applications.
I should have learned by now not to trust my memory. :-).
Correct. Think SFTP.
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1.10
Re: TCP port 3505 is popular for a card reader - Any other programs
Thu Apr 13, 2017 12:56 pm (PDT) . Posted by:
"John P. Hartmann"
I think he meant TFTP
Trivial file transfer protocol? Unlikely I should think. (But it is UDP.)Reply to sender . Reply to group . Reply via Web Post . All Messages (32) . Top ^
2a
TN3270 emulation and code pages
Thu Apr 13, 2017 12:53 pm (PDT) . Posted by:
***@gmail.com
Does the CODEPAGE configuration option has any impact on how data entered via the keyboard is displayed on the screen when connecting to Hercules via a 3270 emulation client like C3270 or QWS3270 ?
Reply to sender . Reply to group . Reply via Web Post . All Messages (5) . Top ^
2b
Re: TN3270 emulation and code pages
Thu Apr 13, 2017 12:58 pm (PDT) . Posted by:
"John P. Hartmann"
The data transmitted "on the wire" is EBCDIC; code page is a client issue.
On 04/13/2017 09:53 PM,
Does the CODEPAGE configuration option has any impact on how data
entered via the keyboard is displayed on the screen when connecting to
Hercules via a 3270 emulation client like C3270 or QWS3270 ?
Reply to sender . Reply to group . Reply via Web Post . All Messages (5) . Top ^entered via the keyboard is displayed on the screen when connecting to
Hercules via a 3270 emulation client like C3270 or QWS3270 ?
2c
Re: TN3270 emulation and code pages
Thu Apr 13, 2017 1:06 pm (PDT) . Posted by:
""Fish" (David B. Trout)" fish_hercules
Does the CODEPAGE configuration option has any impact on
how data entered via the keyboard is displayed on the screen
when connecting to Hercules via a 3270 emulation client
like C3270 or QWS3270 ?
Yes.how data entered via the keyboard is displayed on the screen
when connecting to Hercules via a 3270 emulation client
like C3270 or QWS3270 ?
The data Hercules receives from the TN3270 client is ASCII and must be translated to EBCDIC before passing it on to the guest. When the guest then decides to write something to its 3270 device, the data "received" by Hercules must then be translated from EBCDIC back into ASCII again before being transmitted to the TN3270 client. Your chosen Hercules CODEPAGE is used for both.
--
"Fish" (David B. Trout)
Software Development Laboratories
http://www.softdevlabs.com
mail: ***@softdevlabs.com
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2d
Re: TN3270 emulation and code pages
Thu Apr 13, 2017 1:08 pm (PDT) . Posted by:
"Ivan Warren" ivan_warhead_real
Does the CODEPAGE configuration option has any impact on how data
entered via the keyboard is displayed on the screen when connecting to
Hercules via a 3270 emulation client like C3270 or QWS3270 ?
Dear ahngb4nond2fjs4iv3chtuacfjmf4dgzileuxli7,entered via the keyboard is displayed on the screen when connecting to
Hercules via a 3270 emulation client like C3270 or QWS3270 ?
It shouldn't. Keyboard output on a 3270 terminal is purely a local
matter. Hercules is only involved when an AID key is pressed.
--Ivan
[Non-text portions of this message have been removed]
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2e
Re: TN3270 emulation and code pages
Thu Apr 13, 2017 1:12 pm (PDT) . Posted by:
"John P. Hartmann"
Not correct.
The data in a TN3270 session is EBCDIC, a 3270 data stream.
A TN session (typewriter) is, of course another kettle of fish.
On 04/13/2017 10:05 PM, ''Fish' (David B. Trout)'
***@gmail.com [hercules-390] wrote:
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