Pls confirm SMB over TCP/IP w/o NetBIOS (port 445)

Pls confirm that Mac OS X natively supports SMB over TCP/IP w/o NetBIOS layer, i.e. have you been able to connect to a Windows mashine on port 445 (not 139) w/o port remapping.
MB 2.0 Mac OS X (10.4.9)

I just talked for 30 min with one of the university network sysadmins. Apparently, OS X does NOT support "native" SMB over TCP/IP on 445 (i.e. w/o handshake session on 139). It probably could be done thru VPN or DAVE software, but not thru Finder. There doesn't seem to be an easy fix to smb.conf or nsmb.conf that might do that.
Most of the firewalls around here filter 139 (but not 445) so PC can share with PC over Samba, but Mac can not. Way to go, Apple.

Similar Messages

Safety of MS Sharing on LAN over TCP/IP via NetBIOS and/or Direct SMB

Shalini Sampath Kumar at http://answers.microsoft.com/en-us/windows/forum/windows_7-security/ suggested I post this question over
here:
What is the safest recommended way to set up MS File and Printer Sharing on a LAN with both Windows 7 Pro and XP Pro machines? Does "Direct hosting of SMB over TCP/IP," help? What about setting a "Scope ID" (or did that go out
with Windows NT)?
Background: I've been trained to be paranoid about NetBIOS over TCP/IP. Right now I have only XP Pro machines on my peer-to-peer workgroup LAN (behind a NAT router and with Simple File Sharing turned off), on which File and Printer Sharing has been
unbound from TCP/IP and bound to NetBEUI instead, so I feel fairly safe. Port scanning by ShieldsUp doesn't see any ports through the router, open or closed -- in other words, it appears to be "stealthed," for what that's worth. With
NetBIOS disabled on all computers inside the LAN, however, can I perform a valid test of what will happen when File and Printer Sharing is re-bound to TCP/IP?
My New Problem: I'm planning to add Window 7 Pro machines, for which NetBEUI isn't an option, and then to transition entirely to Win7 before XP goes off extended support in April. I will still use a peer-to-peer architecture with password-protected
sharing turned on (no HomeGroup). It appears that I can still get rid of NetBIOS (and WINS) in favor of "Direct hosting of SMB over TCP/IP," which sounds safer. Apparently then only port 445 will be vulnerable instead of ports 137-139.
In any case I want to do everything I can to protect my file-sharing port(s) from the Internet (e.g., from anyone who might break into my LAN either by making a wireless connection or by hacking the router itself). Can anybody give a clear set of steps
to change sharing from NetBIOS (which I would like to disable entirely) to direct hosting of SMB and to verify that I'm protected as well as possible?
I will have to completely revamp the network-file-sharing configuration of my XP machines as soon as the first Win7 machine goes on line (and possibly tweak the configuration of Win7 as well), perhaps as early as this week. I want to do this in the way that
maximizes security to the extent possible. Thanks in advance more details and guidance on this topic! -- JCW2
P.S. -- These computers are all laptops and will be used away from my home LAN -- another reason for paranoia about File and Printer Sharing. I realize that Windows 7 provides an easy way to disable F&PS by selecting any new network location as
"public," but XP does not (as far as I know). Fixing that will take more effort and be harder to remember... -- JCW2

Removing the NetBIOS transport has several advantages compared to NetBIOS over TCP, you can find detailed infromation in the following KB
Direct hosting of SMB over TCP/IP
http://support.microsoft.com/kb/204279/en-us
Yolanda
TechNet Community Support
Hi again -- I think I'm slowly catching up with you. Following from my previous message...
Somebody on another forum mentioned creating "Hosts" files on each computer to substitute for the DNS server that I don't have on my workgroup. This is intriguing if I can figure out how to set it up. (I've heard it said that taking control of
your "Hosts" file is a good safety precaution anyhow, since it is a frequent target of hackers trying to divert legitimate Web requests to their own malicious sites.) Does anybody have tips and/or references that would help me accomplish the name resolution
there?
Finally, what functionality do I really lose by going the Direct-Hosting-of-SMB-with-Hosts-file (or drive mapping) route as opposed to using NetBIOS over TCP/IP? Granted, any new machine added to the network would also have to be added to all the "Hosts"
files (or mapped to a new drive letter) on each machine; but given that I already have to add it to the MAC filter and assign it a DHCP reservation in my router, this isn't a heavy burden for something that doesn't happen often. Would everything then
work the same as if NetBIOS were providing the name resolution?
One missing piece that I see so far -- it's not obvious how this same trick would apply to printer sharing (although I'm not using that feature right now anyhow). Could this be handled seamlessly through the "Hosts" file as well?
Thanks and Best Regards to All -- JCW2

Curious NetBios over TCP/IP issues and Windows SMB shares

Hi all.
I've got two Win 2003 R2 SP2 member servers on our AD domain. Each has shared network folders on them which are accessed by both Windows and Mac users.
Both servers - lets call them ALPHA and BETA - are identically setup: same hardware, configuration etc. but exist on different subnets.
Alpha has never had a problem with Mac clients connecting to any of its shares.
Beta has, up until recently, only ever had Windows clients, but now has a couple of Snow Leopard Mac clients. When a Mac client attempts to connect via SMB or CIFS to any share on Beta - they get the prompt to authenticate and then "Connection Failed. There was an error connecting to the server Beta. Check the server name or IP address and then try again". Of course the same thing happens when I try to connect by IP.
Curiously, the only way I can get Mac clients to connect to shares on Beta is to go into the network adapter settings on Beta, advanced, WINS and then disable NetBios over TCP/IP. Unfortunatley this breaks some unrelated stuff and I eventually have to go back in and set NetBios back to Default (enabled) and the whole thing screws up again in a few hours time again for my beloved Mac users.
The other server Alpha never gives me any problem with Mac clients, and as I say, they are setup identically. I have been testing this with 10.6.3 clients, not sure if my 10.5 or 10.4 clients are affected.
Can anyone offer some suggestions as to why my shares aren't accessible to my Mac clients on both servers?

Generally it is the browser service that populates network neighborhood. This technology is no longer used with newer OS like server 2008, windows 7/8.
Description of the Microsoft Computer Browser Service
Regards, Dave Patrick ....
Microsoft Certified Professional
Microsoft MVP [Windows]
Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

Multi Thread Server over TCP/IP

Multi Thread Server over TCP/IP. Does it work?
In my box it works only over IPC protocol.
null

S C Maturi (guest) wrote:
: Mark Malakanov (guest) wrote:
: : Multi Thread Server over TCP/IP. Does it work?
: : In my box it works only over IPC protocol.
: Mark,
: Multi threaded server over TCP/IP will not work with
: the current distribution of Oracle 8.0.5 on Linux.
: This is corrected and a patch would be released soon.
: Maturi
tcp 0 0 bock.nettek-ll:listener bock.nettek-
llc.co:4196 ESTABLISHED
tcp 0 0 bock.nettek-llc.co:4196 bock.nettek-
ll:listener ESTABLISHED
(I have serveral of these)
TNS Ping Utility for Linux: Version 8.0.5.0.0 - Production on 07-
JAN-99 18:45:52
(c) Copyright 1997 Oracle Corporation. All rights reserved.
Attempting to contact (ADDRESS=(PROTOCOL=TCP)(HOST=localhost)
(PORT=1521))
OK (440 msec)
...and from my install log you see that I selected MTS:
-[ YESNO
Q> Would you like MTS (Multi-Threaded Server) configured
and the SQL*Net$
A> TRUE
Please explain? Will TCP/IP MTS work via the loopback adapter
only? So far I have not tried a remote TCP/IP connection.
-STEVEl
null

Can I render a Flash frame as a bitmap and send it over TCP/IP?

I want to draw some combination of bitmaps, flash shapes, vectors, text etc and draw them programmatically into my movie using ActionScript, and then get every "rendered" pixel of my movie (at 100% view) into an array that I send to another program over TCP/IP. Can anyone help me here?
The first part of the question is if its possible to render a frame that is a collection of Flash elements as a bitmap? I know that I can iterate through a bitmap and get every pixel using the getPixel method but I'm trying to access the final rendered frame displayed on my screen, including, as I said Flash shapes and text.
The second question is what would be the best way to send this "video frame" over TCP/IP? Would I use an XML socket connection? That is the only way I know how to send data out of Flash over TCP/IP but I don't know if it is the only way - the help page says the data needs to be formatted as XML, which seems unwieldly for this application.
I'm doing this now by using Max/MSP/Jitter to do a screen capture the size and location of my Flash movie and then send out the resulting matrix using a "jit.net.send" object (which lets you send frames of video over TCP/IP), but this is too clumsy for the installation I am building.
Any help would be greatly appreciated!
-bob

Thanks! That was exactly what I was looking for in the first half of the question. And I guess the draw() method works in AS2 as well as AS3. I will test it but from what I understand, I can use a Bitmap as kind of my bottom-level container, then create (in ActionScript) a movie clip that can contain other movie clips or drawing API commands or whatever, animate these various elements then finally draw() them into the bitmap. I see that in AS3 I can even use getPixels or getVector to capture the full "video frame" in one line of code.
Thanks rothrock, for the helpful links. My application is kind of unusual, in that I'm sending "video" data to a proprietary LED controller box for display on a low resolution LED display. I connect to the box over TCP/IP and send it "frames of video" 20 times a second. I got this to work with this other content and software (Max/MSP/Jitter) and I want to see how I could capture all the rendered pixel data in successive frames of Flash animation, format it properly, then send it over TCP/IP to this controller box. Don't really now enough about the various flavors of TCP/IP connections to figure out how to do this in Flash, and I know there are security limitations built in to Flash that have to be worked around. But my movies are small (say 96 pixels by 72 pixels) and I need to send uncompressed data directly to my controller box, so these interesting links showing how to use server-side scripts to create jpgs or pngs are probably not going to help me. I will hopefully find a higher-level programmer than myself to work this out, and I think some of the techniques here will hopefull prove to be helpful.
Thanks again for your help!

How to send joystick data over TCP connection

Hi all,
I am a long time Labview discussion forum user for learning, but this is my first time posting a question, I hope somebody can help me!
In the attached VI I am trying to send data from a joystick over a TCP connection. I can send data fine using the TCP examples (in fact the majority of my VI is just a copy of the example). However I am to the point where I do not know how to send all the data necessary (3 axis data, 12 buttons, and the POV data) over TCP. Strings, clusters, and arrays were never my strong suite and converting between them is a nightmare for me.
Basically I am trying to send each axis data (X,Y, and Z), button data (12 buttons), and POV data (the POV data will be calculated to adjust the position of a camera, so the immediate data is not important, I will add functions to add the change in the button movements to write a standing position for two servos [pan and tilt], for which that I will need to send over the TCP connection) over the TCP connection to control various cameras and motors. I don't know if it is posible to send that much data over a TCP connection in one write VI through a string, and also how to separate the string on the other side in order to control the client VI.
Again, the actual TCP communication I get, and can operate fine, just formatting all the data into a string (or whatever is required) so that I can unpack on the other side is the issue here.
Another question I have (not impotant to get the program running just might make it easier on me) is can a TCP server (which sends the data to the client) also recieve data back from the client on the same port ( for example sensor data and digital positions [on,off])? Or do I need to set up two TCP communication loops with the first client acting as the server on a different port than the first, which then sends the data to the original server, which also has a client TCP configuration in another loop? I hope this makes sense...
One final question.....I already have a solution to this but using labview for the entirety of this project would be nice. I use skype to stream 1080p video from a webcam to my computer so I can view live feed. Can labview do this? This would be awesome if so, I am just not sure if the communication protocols in use could support real time (or as close as possible to streaming) for 1080p video.
Thanks all in advance for your help,
Physicsnole
Attachments:
cameraserver.vi ‏24 KB
cameraclient.vi ‏18 KB

Physicsnole wrote:
In the attached VI I am trying to send data from a joystick over a TCP connection. I can send data fine using the TCP examples (in fact the majority of my VI is just a copy of the example). However I am to the point where I do not know how to send all the data necessary (3 axis data, 12 buttons, and the POV data) over TCP. Strings, clusters, and arrays were never my strong suite and converting between them is a nightmare for me.
Well, you cast the axis info cluster to a string, but then you cast it back to an array of DBL. Thatr's not compatible. You should probably cast it back to an "axis info" cluster of exactly the same type. Go the the other VI and right-click the cluster wire to create a constant. Now move that diagram cluster constant to the other VI and use it as type.
Your default ports don't seem to match. You seem to have client and server roles confused. In the sever you create a listener, but then you start sending packets, even though no connection is established. The connection needs to be initiated by the client.
Your client stops the loop the first time a timeout is encountered. Shouldn't that be more permanent? Also, please retain code clarity and avoid unecessary complexities. For example, replace the "not or" with a plain "or" and change the loop to "stop if true"
Physicsnole wrote:
Basically I am trying to send each axis data (X,Y, and Z), button data (12 buttons), and POV data (the POV data will be calculated to adjust the position of a camera, so the immediate data is not important, I will add functions to add the change in the button movements to write a standing position for two servos [pan and tilt], for which that I will need to send over the TCP connection) over the TCP connection to control various cameras and motors. I don't know if it is posible to send that much data over a TCP connection in one write VI through a string, and also how to separate the string on the other side in order to control the client VI.
You can send as much as you want. The casting to/from string is the same as described above.
Physicsnole wrote:
Another question I have (not impotant to get the program running just might make it easier on me) is can a TCP server (which sends the data to the client) also recieve data back from the client on the same port ( for example sensor data and digital positions [on,off])? Or do I need to set up two TCP communication loops with the first client acting as the server on a different port than the first, which then sends the data to the original server, which also has a client TCP configuration in another loop? I hope this makes sense..
The primary function of a "server" is to wait for a connection and then communicate with the client once a conenction is established. An established TCP/IP connection is fully two-way and both sides can send and receive.
LabVIEW Champion . Do more with less code and in less time .

Connecting to non-secure listener port over TCPS

Hi,
I am trying to connect to non-SSL port over TCPS.
When I use tnsping, it hangs.
When I do an OCIServerAttach, it hangs.
Client is 10.2
And Database server is 9.2 and higher..
Any way I can find out why this is happening??
-Harsha

Maybe I'm not getting the point, but when you do not use SSL on this port, why do you want to use TCPS. Wouldn't TPC be a better choice?
cu
Andreas

SSL Connection over TCP using SSLSocketFactory to remote C++ Server

Hi.
Despite my traversing through the archives, I could not find a
solution to my problem. So hopefully, that would mean i have a simple
isolated, and FIXABLE problem :-)
My web application running under Weblogic 7.01 as a servlet needs to
connect to a remote server using SSL over tcp.
The server is a C++ app using openssl libraries to serve up a
self-signed certificate.
The code fragments to do so look like this:
     SSLSocketFactory sf =
(SSLSocketFactory)SSLSocketFactory.getDefault();
     connection = sf.createSocket(host, port);
     output.write(...)
     output.flush();
Upon the flush, I get the following error:
java.io.IOException: Write Channel Closed, possible SSL handshaking or
trust failure
     at com.certicom.tls.record.WriteHandler.write(Unknown Source)
     at com.certicom.tls.interfaceimpl.TLSConnectionImpl.fireAlertSent(Unknown
Source)
     at com.certicom.tls.record.handshake.HandshakeHandler.fireAlert(Unknown
Source)
     at com.certicom.tls.record.handshake.HandshakeHandler.fireAlert(Unknown
Source)
     at com.certicom.tls.record.handshake.HandshakeHandler.handleHandshakeMessage(Unknown
Source)
     at com.certicom.tls.record.handshake.HandshakeHandler.handleHandshakeMessages(Unknown
Source)
     at com.certicom.tls.record.ReadHandler.interpretContent(Unknown
Source)
     at com.certicom.tls.record.ReadHandler.readRecord(Unknown Source)
     at com.certicom.tls.record.ReadHandler.readUntilHandshakeComplete(Unknown
Source)
     at com.certicom.tls.interfaceimpl.TLSConnectionImpl.completeHandshake(Unknown
Source)
     at com.certicom.tls.record.WriteHandler.write(Unknown Source)
     at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:67)
     at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:125)
     at java.io.DataOutputStream.flush(DataOutputStream.java:99)
My guess is that its complaining about not trusting the certificate
being sent back by the server.
I typically use JSSE for this application when running within other
appservers, and
this application has no problems. But because i've run into issues
with using JSSE in WL7.01 (another topic
for another day), I'm using the default WL ssl library.
I have set weblogic.security.SSL.trustedCAKeyStore=d:\bea\weblogic700\server\lib\cacerts,
and imported my
certificate into that cacerts file. This doesn't seem to fix my
problem. Is there another truststore
that my webapp may rely on? Where within the admin console can I
figure this out?
Or am I on the wrong track here?
Also, if its any clue, elsewhere within the same application, I make
https requests to another
web app running under the same weblogic server - and that is fine - I
use the URLConnection class in those cases.
Any help is much appreciated!
Thanks
Ed

Hi,
Can you show us the stacktrace?
/Kaj

How could I create a Compliance Settings that enforces NetBIOS over TCP/IP?

Hello Everyone,
I need to be able to enforce NetBIOS over TCP/IP on some collections. I've created a batch script with one line that disable NetBIOS over TCP/IP but I also need to make sure this is enforced. How could I do the enforcement using Compliance Settings?
This is the line I use to disable it;
"wmic nicconfig where (TcpipNetbiosOptions!=Null and TcpipNetbiosOptions!=2) call SetTcpipNetbios 2"
Thank you everyone in advance for any help

I could probably help you with a CI for discovery and remediation, but I need (or you need to define) an additional parameter.
If I were to run this as a powershell discovery script:
$adapter=(gwmi win32_networkadapterconfiguration | where {$_.ipenabled -eq "1"})
Foreach ($nic in $adapter) {
write-host $nic.TcpIPNetBiosOptions
what's echo'd out (in my testing) is a 0, a 1 , or a 2.
0 means "default--use what your dhcp is offering"
1 = enabled
2 = disabled.
So... from your standpoint... is a 0 or 1, (either one) acceptable? or is only a value of 1, a hard-coded at the client (not whatever the default is from dhcp) the only acceptable value?
fyi, the remediation script, if 1 is the only acceptable answer, would probably be this:
$adapter=(gwmi win32_networkadapterconfiguration | where {$_.ipenabled -eq "1"})
Foreach ($nic in $adapter) {
$adapter.settcpipnetbios(1)
Standardize. Simplify. Automate.

Send Bytes over TCP/IP

{noformat}I am trying to send an array of bytes over tcp using OutputStream to a chat dispatch server, but few extra bytes are getting added at the begining and
at the end of the original data I want to send.
Why is this hapening and how do I overcome this?{noformat}

ejp wrote:
byte[] consisted of byte array converted from this hex dumpConverted how?
If you use a String as a container for this binary data it will be corrupted.I declared the dump as a string like:
"8A00000000000000000000000B000000476174656B6565706572320F0000004765744C6F67696E536572766572735C0000001800000052656469666620426F6C382E3020206275696C6420323735030000000A00000052424F4C2F312E322E351700000052424F4C2F312E322E352B485454505F434F4E4E4543540F00000052424F4C2F312E322E352B48545450"
after this what should i do?
what I am doing is
1. extract two characters from the string at a time
2. join them to make a string of two characters
3. then treat that string as a hex value
4. convert that hex value to its ascii-char equivalent( so i get an array of characters )
5. convert the array of characters to array of bytes and send .
I think that there is a better way to do this. Please suggest. So that no problem occurs.

SOAP over TCP/IP

Hi,
Has anyone implemented SOAP over TCP/IP sockets instead of using a web server? Does JWSDP support this?
Any information and pointers on how to implement this is highly appreciated.
Thanks in advance.
Amogh

WSIT, which is built on top of JAX-WS supports SOAP/TCP. You can get wsit from http://wsit.dev.java.net

Why is Diadem DAC is slow when reading over TCP/IP?

Hi,
I wrote a small VB Script in order to comunicate with a Power Supply over TCP/IP in Diadem DAC, when I first run it, it works perfectly but if I I stop the program and run it again it is suddenly very slow. The only way to make it run normaly again is If I restart Diadem.
Am I closing my TCP/IP connection correctly? I am not sure what the problem could be.
thanks for your help
Attachments:
PSC_ETH_ReadWrite_Script.txt ‏2 KB

Hi,
sorry, but I've no answer to this question but nearly the same problem.
I wrote a small Qt socket app. which provides a TCP-Server sending every 100 ms.
I'd like to have Diadem plotting the sent data - I setup a 25 ms refresh rate but
the actual refresh lasts for about 1 s!! The sent values seem to reach Diadem
but the processing needs very much time, hence the processor load goes
directly to 100% which seems to be very strange. I put my code for reading
the values into the TCP script driver template - SFD_ReadChannel method.
If comment out the "oUDIM.read()" the refresh is as expected, with the read
command everything slows down dramatically?
What's the mistake?
Best regards and thanks for your help...

Modbus RTU over TCP (Simex Transmitter and Advantech Server)

Hey Guys,
somehow i am not able to get a connection over TCP IP using RTU Mode (reading values) from a transmitter which is hooked up to an advantech EKI 1542 Server. The Port is configured as an RS 485.
i am using the modbus library and i tried to adjust the MB serial read holding registers vi to accept a TCP IP Socket input instead of an INSTR. Do you have any suggestions?
Thanks a lot for the forum support!

Hi Christo and welcome to NI Forums!
Is this the ModBus library you are using? If so, I'd recomend to check out the newer, object based library available here. It has a more straightforward setup, especially for using TCP connections. You'll find an example VI for using a master, as well as a slave device, and these you'll be able to use right away without much modification. The code'll look like:
Please test your device communication using this library.
Kind regards:
Andrew Valko
NI Hungary
Andrew Valko
National Instruments Hungary

Connecting to labview over TCP/IP port

I have got an undocumented project to maintain, it has a Java UI code, which connects with some component of LABVIEW over
TCP/IP Port = 1234
and over this port it sends commands for clear, get, set
I need links for understanding the component from LABVIEW which is been accessed over port 1234
I have installed LABVIEW Run time 2013, and do not know which PROCESS the Java code is trying to connect over TCP/IP, and I do not see any of the RT processes binding to port 1234.
Any pointers/links would certainly help me!
Thanks,
-Vikrant

Can you define what you mean by "component of LabVIEW"?
The LabVIEW runtime engine is just a required component to run any custom build LabVIEW executable or dll. So, what is it?
You also mention RT processes. Does this run on an RT system? What is running where? If you are connecting to a remove LabVIEW RT system that runs a service on port 1234, you don't need LabVIEW or a run time engine at all on the local side.
At this time we don't have any useful information from you. Please be significantly more detailed! Thanks.
LabVIEW Champion . Do more with less code and in less time .

Buffered streaming over TCP/IP

Hi!
I want to transmit a live (with a little delay) video or voice over TCP/IP and stay able to chat with keyboard too. What is the best way to do it?
Here is the link to my Chat-Project: Chat-Project
Thank you!
LabVIEW Portal

Hi,
I use Datasocket for this. Never tried TCP/IP functionalities. Have you considered the Datasocket option? Or have you already resolved your task?
Vaibhav

Pls confirm SMB over TCP/IP w/o NetBIOS (port 445)

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