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• How to access an IP address as if on a different network using SSH

  - by NT3RP

  In preparation for a lengthy business trip, I set up my router such that I can access my home computer over the internet via port forwarding over SSH. One thing I neglected to do was setup access to my router remotely. Normally, I can just access the router configuration page via 192.168.1.1. I know that it's possible to tunnel traffic through SSH, but how do I access an IP address as if I were on my home network using SSH?

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• Mapping of memory addresses to physical modules in Windows XP

  - by Josef Grahn

  I plan to run 32-bit Windows XP on a workstation with dual processors, based on Intel's Nehalem microarchitecture, and triple channel RAM. Even though XP is limited to 4 GB of RAM, my understanding is that it will function with more than 4 GB installed, but will only expose 4 GB (or slightly less). My question is: Assuming that 6 GB of RAM is installed in six 1 GB modules, which physical 4 GB will Windows actually map into its address space? In particular: Will it use all six 1 GB modules, taking advantage of all memory channels? (My guess is yes, and that the mapping to individual modules within a group happens in hardware.) Will it map 2 GB of address space to each of the two NUMA nodes (as each processor has it's own memory interface), or will one processor get fast access to 3 GB of RAM, while the other only has 1 GB? Thanks!

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• Rough estimate for speed advantage of SAN-via-fibre to san-via-iSCSI when using VMware vSphere

  - by Dirk Paessler

  We are in the process of setting up two virtualization servers (DELL R710, Dual Quadcore Xeon CPUs at 2.3 Ghz, 48 GB RAM) for VMware VSphere with storage on a SAN (DELL Powervault MD3000i, 10x 500 GB SAS drives, RAID 5) which will be attached via iSCSI on a Gbit Ethernet Switch (DELL Powerconnect 5424, they call it "iSCSI-optimized"). Can anyone give an estimate how much faster a fiber channel based solution would be (or better "feel")? I don't mean the nominal speed advantage, I mean how much faster will virtual machines effectively work? Are we talking twice the speed, five times, 10 times faster? Does it justify the price? PS: We are not talking about heavily used database servers or exchange servers. Most of the virtualized servers run below 3-5% average CPU load.

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• OpenVPN/Tunnelblick through wireless router, no connection.

  - by Oscar

  I'm using OpenVPN with Tunneblick on my Macbook Pro to access a server on my job. I't works fine, but i can't get it working with my Netgear WGT624v3 wireless router. I get this warning: WARNING: potential route subnet conflict between local LAN [192.168.1.0/255.255.255.0] and remote VPN [192.168.1.0/255.255.255.0] Someone told me that i should "port forward" on my router, but i can't figure out the right settings. Also not shure i'm doing it right.

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• Any tool to check which ports/protocols firewalls prevent?

  - by Jus12

  Suppose I have a setup as: host_1 --- Firewall_1 --- Internet --- Firewall_2 --- host_2 I need to check which ports are open on host_2 from host_1 (which may be blocked by either firewalls) If there a tool that comes in two parts (one running on host_1 and other on host_2) that does this for me? It should be something like: 1 Listen to all ports on host_2 2 Try to connect to every port on host_2 from host_1 3 Give a report what ports are allowed.

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• Extracting the layer transparency into an editable layer mask in Photoshop

  - by last-child

  Is there any simple way to extract the "baked in" transparency in a layer and turn it into a layer mask in Photoshop? To take a simple example: Let's say that I paint a few strokes with a semi-transparent brush, or paste in a .png-file with an alpha channel. The rgb color values and the alpha value for each pixel are now all contained in the layer-image itself. I would like to be able to edit the alpha values as a layer mask, so that the layer image is solid and contains only the RGB values for each pixel. Is this possible, and in that case how? Thanks. EDIT: To clarify - I'm not really after the transparency values in themselves, but in the separation of rgb values and alpha values. That means that the layer must become a solid, opaque image with a mask.

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• Dynamic DNS on D-Link DWR-112 3G router uses a private IP address

  - by user270151

  I'm using a D-Link DWR-112 3G router to connect to the internet by using Celcom broadband plug-in. How can I do the port forwarding to my server? I already have correctly configured my DynDNS, but every time the DynDNS will not set to public address but local private address with in the range 10.xxx.xxx.xxx. My router address is 192.168.1.1 and server address is 192.168.1.5. Can someone give me some guideline about this issue?

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• Zyxel P-320W: How to connect to my web server using public IP

  - by hvtuananh

  My company's router is Zyxel P-320W and I have a public static IP. I registered a few domains name and point to this IP address. I already setup Virtual Hosts and configured port-forwarding to my internal server and it works well. I can connect to all domains from outside The problem is I cannot connect to my domains from inside One workaround way is modify hosts file to add internal IP for those domains, but my company have many computers and I don't want to setup all PC manually

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• FTP/SSL in passive mode with portrange, which ports has to be open on the firewall?

  - by Queensheep

  We have to use FTP over SSL on our server and use a portrange with 5 ports for the data connection. A firewall is between client and server. We have to know what we have to open at the firewall: port, protocoll, in- or outcomming. Does anybody know this?

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• FTP/SSL in passive mode with portrange, which ports has to be open on the firewall?

  - by Queensheep

  We have to use FTP over SSL on our server and use a portrange with 5 ports for the data connection. A firewall is between client and server. We have to know what we have to open at the firewall: port, protocoll, in- or outcomming. Does anybody know this?

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• What firewall ports do I need to open when using FTPS?

  - by anoopm

  I need to access an ftps server (vsftpd) on a vendor's site. The vendor has a firewall in front of the ftps server and I have a firewall in front of my ftps client. I understand that ports 990, 991 and maybe 989 need to be opened up for control traffic. When looking at it from the vendor's firewall perspective, should these ports be opened up for both inbound and outbound traffic? What about ports for the DATA channel? Do I have to open all ports above 1000? And should I do it for both inbound and outbound traffic? TIA for your help.

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• How can I login (send text) with minicom?

  - by Travis

  I am attempting to login from a Linux client to a set top box running Linux via a USB to serial cable. When I power on the device, I can see the init messages scroll past, and I get to the login prompt, like this: (none) login: but I cannot login. The cursor stops flashing as if it is receiving input, but there is no response. My serial port setup is: Device: /dev/ttyUSB0 Bps: 115200 8N1 Hardware Flow Control: Yes Software Flow Control: No Any help would be greatly appreciated!

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• Getting Serial Port Information and Sorting the Results in C#

  - by Jim Fell

  I have some code that loads the serial ports into a combo-box: comboBoxComPort.Items.Add("Select COM port..."); foreach (string s in SerialPort.GetPortNames()) { comboBoxComPort.Items.Add(s); } comboBoxComPort.SelectedIndex = 0; Ideally, I would like to add the port descriptions to the list and sort the items in the list that are after index 0. Does anyone have any suggestions for doing this? Any thoughts you may have would be appreciated. Thanks.

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• java serial I/O: handling USB serial connection/disconnection in a robust manner

  - by Jason S

  I'm using rxtx for serial I/O handling in Java with an FTDI2232H that provides a USB comm port. It works great, with one exception: if I unplug the USB cable, so that the COM port disappears at runtime, it spews exceptions left and right: java.io.IOException: No error in nativeavailable at gnu.io.RXTXPort.nativeavailable(Native Method) at gnu.io.RXTXPort$SerialInputStream.read(RXTXPort.java:1427) at gnu.io.RXTXPort$SerialInputStream.read(RXTXPort.java:1339) and when I re-plug the cable in again, it does not recover. Is there any way to get rxtx to work properly with USB comm port connection/disconnection? (I've tried to post to the rxtx mailing list but for some strange reason I cannot send messages even though I am subscribed to the list. I've emailed the list admin and have gotten no response.) If not, is there another serial I/O framework that does?

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• Configure a Port with an SSL Certificate w\o using Httpcfg

  - by dudia

  Hi, When one develops a self-hosted WCF http server, one of the steps needed is to bind an SSL certificate to a port number: httpcfg set ssl -i 0.0.0.0:8012 -h 0000000000003ed9cd0c315bbb6dc1c08da5e6 as stated in: http://msdn.microsoft.com/en-us/library/ms733791.aspx However, It is hardly expected that in my deployment environment one would be able to do it. (I don't even know if the httpcfg.exe is redistributable) Moreover, if the user changed the port after he installed the product then he will need to run the command again.... how can this step be automated pro grammatically? preferably in C# but if it can only be done in C++ (direct access to the Http Server API) then I will manage :)

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• sudo port install cmake trouble (for MGTwitterEngine)

  - by RexOnRoids

  I am following This Tutorial on installing MGTwitterEngine on my MAC osx 10.6.2. I am stuck on this step: sudo port install cmake it gives me the following error: dlopen(/opt/local/share/macports/Tcl/pextlib1.0/Pextlib.dylib, 10): no suitable image found. Did find: /opt/local/share/macports/Tcl/pextlib1.0/Pextlib.dylib: no matching architecture in universal wrapper while executing "load /opt/local/share/macports/Tcl/pextlib1.0/Pextlib.dylib" ("package ifneeded Pextlib 1.0" script) invoked from within "package require Pextlib 1.0" (file "/opt/local/bin/port" line 40) Rex-MacBook-Pro:~ Rex$ Thus, I cannot use TERMINAL to install YAJL to get my app to build. Help needed. P.S. In terminal preferences, Shells Open With is either /usr/bin/login or /bin/bash YAJL is supposedly installed at /Users/Rex I am using OSX 10.6.2

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• .NET version or port of Flying Saucer

  - by Tawani

  Is there any open source .NET project (or port) similar to the Flying Saucer project which renders HTML to PDF using iText?

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• What port(s) is used for VS2008 remote debugging

  - by schmoopy

  What port(s) needs to be open on the remote machine hosting msvsmon.exe?

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• Change SQL SERVER EXPRESS 2008 TCP port with Microsoft.SqlServer.Management.Smo

  - by Norman

  I need to change the default port(1433) of SQL EXPRESS 2008 instance in c#.

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• how to change port number of Apache server in windows OS

  - by jesop

  i have installed xampp control panel and Apache 2.2 on windows XP when i type http://localhost/ gives me page which says It Works! now i want to change the port number 80 to some other number how to change it ? in how many files does it needs to be changed ? dose it require to restart the system to change to take effect ? note: i have changed port number in C:\xampp\apache\conf\httpd.conf in two places where it says Listen 80 and ServerName localhost:80 Pls help, thanks.

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• Check if serial port is listening

  - by Hyposaurus

  I have an Arduino sending and receiving instructions with a python script via a serial port. The Arduino takes a button state and when it is pushed it will send a message via serial to a python script and await a response. (via Serial.available()). Works well enough. However if the python script has crashed for whatever reason (ideally it will run in the background, so cant be easily checked) the Arduino will wait forever and even on a script restart will we unavailable. Is there a way for my Arduino to check if there is something listening on the serial port? (and alert me with flashing lights etc if not) or is this not how serial works? Worst case I guess I could use a timeout, although that is not ideal.

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• which command is used to block tcp port

  - by astha

  i want to block tcp port with the help of iptables commands linux which command is used for this purpose????

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• Erlang: Interfacing with Xalan: port driver or nif?

  - by mwt

  I'd like to get a real XSLT processor working with erlang. Which would be the best interface, nif or port driver? According to the nif documentation, nif calls block the runtime, so they should not take long. Is processing a long xml document too long? Also, I'd like to allow erlang callbacks during the transformation. Does that seem possible? Possible with nif but not port drivers or vice versa? I've never written any C, so I figured this would be good introduction. Xalan is C++. I assume nif can work with that, right?

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• CSMA/CD once channel captured, can only one or multiple frames be sent before other stations try tra

  - by Bryce Thomas

  Hi there, I have a question regarding CSMA/CD in the IEEE 802.3 LAN standard. I'm trying to understand the behavior of CSMA/CD after a station has captured the channel. Say station A has captured the channel and has an infinite supply of frames it is sending. Also assume that station B has something it wants to send. Now, if I understand correctly, station B senses the line and sees that station A has captured the channel/is transmitting. My question is, does station B see the channel as being captured for the duration of ALL of the frames that station A sends (an infinite period of time), or does station B only consider the channel captured for the first frame it sees A send, after which B goes ahead and transmits its own frame (which will collide with one of the remaining frames still coming from A)?

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• what causes the .NET SerialPort class DataReceived event to fire?

  - by Klay

  I understand from the MSDN docs that the event DataReceived will not necessarily fire once per byte. But does anyone know what exactly is the mechanism that causes the event to fire? Does the receipt of each byte restart a timer that has to reach, say 10 ms between bytes, before the event fires? I ask because I'm trying to write an app that reads XML data coming in from a serial port. Because my laptop has no serial ports, I use a virtual serial port emulator. (I know, I know--I can't do anything about it ATM). When I pass data through the emulated port to my app, the event fires once for each XML record (about 1500 bytes). Perfect. But when a colleague at another office tries it with two computers connected by an actual cable, the DataReceived event fires repeatedly, after every 10 or so bytes of XML, which totally throws off the app.

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