According to [Wikipedia][1]:

&lt;pre&gt;
5222 TCP     XMPP client connection (RFC 6120)        Official  
5223 TCP     XMPP client connection over SSL          Unofficial
5269 TCP     XMPP server connection (RFC 6120)        Official
5298 TCP UDP XMPP JEP-0174: Link-Local Messaging /    Official
             XEP-0174: Serverless Messaging
8010 TCP     XMPP File transfers                      Unofficial	
&lt;/pre&gt;

The port numbers are defined in [RFC 6120][2] &#167; 14.7.

[1]: http://en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
[2]: http://xmpp.org/rfcs/rfc5120.html


[3]: http://www.google.com/search?q=xmpp+port
[iana]: http://xmpp.org/rfcs/rfc3920.html#iana
[tcp]: http://tools.ietf.org/html/rfc793

According to [Extensible Messaging and Presence Protocol (Wikipedia)][1], the standard TCP port for the server is 5222.

The client would presumably use the same ports as the messaging protocol, but can also use  http (port 80) and https (port 443) for message delivery. These have the advantage of working for users behind firewalls, so your network admin should not need to get involved.


  [1]: http://en.wikipedia.org/wiki/Extensible_Messaging_and_Presence_Protocol

The ports required will be different for your XMPP Server and any XMPP Clients.  Most &quot;modern&quot; XMPP Servers follow the defined IANA Ports for Server-to-Server 5269 and for Client-to-Server 5222.  Any additional ports depends on what features you enable on the Server, i.e. if you offer BOSH then you may need to open port 80.

File Transfer is highly dependent on both the Clients you use and the Server as to what port it will use, but most of them also negotiate the connect via your existing XMPP Client-to-Server link so the required port opening will be client side (or proxied via port 80.)

The [official ports](https://xmpp.org/rfcs/rfc6120.html#iana-ports) (TCP:5222 and TCP:5269) are listed in RFC 6120.  Contrary to the claims of a [previous answer](https://stackoverflow.com/a/3452184/7177944), XEP-0174 [does not specify a port](https://xmpp.org/extensions/xep-0174.html#impl-port).  Thus TCP:5298 might be customary for Link-Local XMPP, but is not official.

You can use other ports than the reserved ones, though:  You can make your DNS SRV record point to any machine and port you like.

[File transfers (XEP-0234)](http://xmpp.org/extensions/xep-0234.html) are these days handled using [Jingle (XEP-0166)](https://xmpp.org/extensions/xep-0166.html).  The same goes for [RTP sessions (XEP-0167)](https://xmpp.org/extensions/xep-0167.html).  They do not specify ports, though, since Jingle negotiates the creation of the data stream between the XMPP clients, but the actual data is then transferred by other means (e.g. RTP) through that stream (i.e. not usually through the XMPP server, even though in-band transfers are possible).  Beware that Jingle is comprised of several XEPs, so make sure to have a look at the whole list of [XMPP extensions](https://xmpp.org/extensions/).

What is the fastest way to check if a string matches a certain pattern? Is regex the best way?

For example, I have a bunch of strings and want to check each one to see if they are a valid IP address (valid in this case meaning correct format), is the fastest way to do this using regex? Or is there something faster with like string formatting or something. 


Something like this is what I have been doing so far:

    for st in strs:
        if re.match(&#39;\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}&#39;, st) != None:
           print &#39;IP!&#39;





check if a string matches an IP address pattern in python?

What is the default font (and its size) in the Visual Studio 2010 and 2008 editor?


Default Visual Studio 2010 and 2008 font

I&#180;ve searched and didnt find which ports does XMPP uses.
I need to implement XMPP server and client and use XML transfer, file transfer and streaming.
Do they use different ports?? Is there a way I can make them use all the same, so I dont need to bother the network admin?
Thanks

Which port(s) does XMPP use?

<p>I´ve searched and didnt find which ports does XMPP uses.
I need to implement XMPP server and client and use XML transfer, file transfer and streaming.
Do they use different ports?? Is there a way I can make them use all the same, so I dont need to bother the network admin?
Thanks</p>


Which XMPP library would be the best choice nowadays for Android development?


 - I&#39;ve been using the **[patched Smack
   library][1]** as is
   suggested in many other questions
   here in SO. However, that&#39;s a patched version of
   the Smack API from two years ago. And
   although it generally works well I&#39;m
   exploring any other, more recent
   options.
   
 - I&#39;ve been looking at the **[official
   Smack API][2]** and after a little
   research, it seems it might work just
   fine nowadays (although I have not
   tried it yet in a real application).
   
 - There&#39;s also another solution I came
   across, **[Beem&#39;s aSMACK library][3]**.
   Beem is a fairly new XMPP client for
   android and from what I understand
   they are using their own patched
   version of aSMACK.
   
 - Finally, there&#39;s **[aSMACK][4]** but that
   too hasn&#39;t been updated for quite
   some time (as the site suggests).

Do you have any other suggestions or can you explain why I should choose one of the above over the rest?


  [1]: http://davanum.wordpress.com/2008/12/29/updated-xmpp-client-for-android/
  [2]: http://www.igniterealtime.org/projects/smack/
  [3]: http://www.beem-project.com/projects/beem/files
  [4]: http://code.google.com/p/asmack/

Android and XMPP: Currently available solutions

I am planning to develop a web based chat application which takes in ReSTful requests, translate them to XMPP and deliver them to an XMPP server.

Using websockets for this kind of chat based application looked promising as the events (or responses) can be delivered asynchronously. But if I use websockets as the underlying protocol for transferring the requests from the browser, can this still be considered as a ReSTful design? If yes, how are the URIs, verbs (GET, POST...), parameters represented in the websocket message? Wrap them in an xml/json and send it?

Also, ReSTful architecture states that no session state will be stored on the server. But here in this case when an XMPP client session is created, the state of this session will be stored on the server (violating the stateless constraint)

Is ReST over websockets possible?

&gt; **OBSERVE** https://developers.facebook.com/docs/chat/
&gt;
&gt; The service and API this document covers has been deprecated with the release of Platform API v2.0. Once version 1.0 is deprecated, chat.facebook.com will no longer be available.
&gt;
&gt; **Important! Read this and you probably want to do something completely different than anything that has to do with this question.**

I&#39;m creating a chat with WebForms C# connecting to Facebook Chat API. 

I have also looked at [this SO question](https://stackoverflow.com/q/7221622/146622) (and all links). Some parts are no longer relevant since Facebook requires `auth_token` now.

To replicate this, you should set up a Facebook web app, use the `appId` and a user account with xmpp_login permission set. Then create a `Chat.aspx` with code behind and paste this code accordingly. And replace the hard-coded users to interact with.

I have two (maybe three) issues which I believe prevent me from succeeding with my goal to send a chat message. 

1. The process noted as `// finishes auth process` in the documentation does not match the [documentation description](https://developers.facebook.com/docs/chat/)
(I&#39;m not getting any respones after I have received my SSL/TLS based success message from Facebook.)
2. I have no idea how the &#39;send chat message&#39;-part should be set up, and since I don&#39;t receive any messages from Facebook its hard to tell what might be wrong.

[Here is my code in its entirety, on PasteBin](http://pastebin.com/jst7qkrh).

I also have some helpers for adding xmpp_login permissions and such.. removed for clarity.

Global variables:

    public partial class Chat : Page
    {
        public TcpClient client = new TcpClient();
        NetworkStream stream;
        private SslStream ssl;
        private string AppId { get; set; }
        public string AppSecret { get; set; }
        public string AppUrl { get; set; }
        public string UserId { get; set; }
        public string AccessToken { get; set; }
        private string _error = string.Empty;//global error string for watch debugging in VS. 

        public const string FbServer = &quot;chat.facebook.com&quot;;
        private const string STREAM_XML = &quot;&lt;stream:stream xmlns:stream=\&quot;http://etherx.jabber.org/streams\&quot; version=\&quot;1.0\&quot; xmlns=\&quot;jabber:client\&quot; to=\&quot;chat.facebook.com\&quot; xml:lang=\&quot;en\&quot; xmlns:xml=\&quot;http://www.w3.org/XML/1998/namespace\&quot;&gt;&quot;;
        private const string AUTH_XML = &quot;&lt;auth xmlns=&#39;urn:ietf:params:xml:ns:xmpp-sasl&#39; mechanism=&#39;X-FACEBOOK-PLATFORM&#39;&gt;&lt;/auth&gt;&quot;;
        private const string CLOSE_XML = &quot;&lt;/stream:stream&gt;&quot;;
        private const string RESOURCE_XML = &quot;&lt;iq type=\&quot;set\&quot; id=\&quot;3\&quot;&gt;&lt;bind xmlns=\&quot;urn:ietf:params:xml:ns:xmpp-bind\&quot;&gt;&lt;resource&gt;fb_xmpp_script&lt;/resource&gt;&lt;/bind&gt;&lt;/iq&gt;&quot;;
        private const string SESSION_XML = &quot;&lt;iq type=\&quot;set\&quot; id=\&quot;4\&quot; to=\&quot;chat.facebook.com\&quot;&gt;&lt;session xmlns=\&quot;urn:ietf:params:xml:ns:xmpp-session\&quot;/&gt;&lt;/iq&gt;&quot;;
        private const string START_TLS = &quot;&lt;starttls xmlns=\&quot;urn:ietf:params:xml:ns:xmpp-tls\&quot;/&gt;&quot;;


Then in `Page_Load` all the steps required are (or are supposed to be) performed. Worth noting is the `SendMessage(&quot;test&quot;);`. I just tried to put it there to see if it would succeed in sending a chat message... `SetUserNameAndAuthToken` sets my auth token and user name to global variables. The AuthToken works. 

    protected void Page_Load(object sender, EventArgs e)
	{
		this.AppId = &quot;000000082000090&quot;;//TODO get from appsettings.
		//AddAdditionalPermissions(&quot;xmpp_login&quot;);//TODO handle xmpp_login persmission
		this.AppSecret = &quot;d370c1bfec9be6d9accbdf0117f2c495&quot;; //TODO Get appsecret from appsetting.
		this.AppUrl = &quot;https://fbd.anteckna.nu&quot;;

		SetUserNameAndAuthToken();

		Connect(FbServer);

		// initiates auth process (using X-FACEBOOK_PLATFORM)
		InitiateAuthProcess(STREAM_XML);

		// starting tls - MANDATORY TO USE OAUTH TOKEN!!!!
		StartTlsConnection(START_TLS);

		// gets decoded challenge from server
		var decoded = GetDecodedChallenge(AUTH_XML);

		// creates the response and signature
		string response = CreateResponse(decoded);

		//send response to server
		SendResponseToServer(response);

		SendMessage(&quot;test&quot;);
	   
		// finishes auth process
		FinishAuthProcess();

		// we made it!
		string streamresponseEnd = SendWihSsl(CLOSE_XML);

	}
So I get a response then I send the response to server:

    private void SendResponseToServer(string response)
	{
		string xml = String.Format(&quot;&lt;response xmlns=\&quot;urn:ietf:params:xml:ns:xmpp-sasl\&quot;&gt;{0}&lt;/response&gt;&quot;, response);
		string response2 = SendWihSsl2(xml);
		if (!response2.ToLower().Contains(&quot;success&quot;))
			_error = response2;
	}

This takes 1 minute 40 seconds... and response is:

    &lt;success xmlns=&#39;urn:ietf:params:xml:ns:xmpp-sasl&#39;/&gt;

Finally I do the FinishAuthPorcess()

    private void FinishAuthProcess()
	{
		string streamresponse = SendWithSsl(STREAM_XML);
		if (!streamresponse.Contains(&quot;STREAM:STREAM&quot;))
			_error = streamresponse;
		
		string streamresponse2 = SendWihSsl(RESOURCE_XML);
		if (!streamresponse2.Contains(&quot;JID&quot;))
			_error = streamresponse2;

		string streamresponse3 = SendWihSsl(SESSION_XML);
		if (!streamresponse3.Contains(&quot;SESSION&quot;))
			_error = streamresponse2;
	}

All responses are `&quot;&quot;`. Looking at the `Read` method in `SendWithSsl`: it&#39;s 0 bytes.
Trying to send a message also gives me 0 bytes Read data from Facebook. I have no clue as to why?

Send message via Facebook Chat API (XMPP) C#

I&#39;m about to develop a website that has near real time chat. I know that it can be implemented using xmpp or websocket protocols. I know also that the xmpp protocol has been developed in 1999 , and I guess it should be mature nowadays .On the other hand , the websocket protocol has been developed in 2011. 

 1. What was the need for websocket if xmpp was good in handling real time conversations?
 2.  What are the major differences between the 2 protocols? 
 3. And when should I choose one of them over the other?


Xmpp Vs Websocket

Initial Attempt
=====

I have an Azure VM with Windows Server 2012, on which I just installed SQL Server 2012 Express Database Engine component. Then, I followed the instructions [here][1] to connect remotely with SQL Server Management Studio.

&gt;  1. Create a TCP endpoint for the virtual machine
&gt;  2. Open TCP ports in the Windows firewall
&gt;  3. Configure SQL Server to listen on the TCP protocol
&gt;  4. Configure SQL Server for mixed mode authentication
&gt;  5. Create SQL Server authentication logins
&gt;  6. Determine the DNS name of the virtual machine
&gt;  7. Connect to the Database Engine from another computer

After step seven I received the following error:

&gt; A network related or instance-specific error occurred while
&gt; establishing a connection to SQL Server. The server was not found or
&gt; was not accessible. Verify that the instance name is correct and that
&gt; SQL Server is configured to allow remote connections. (provider: Named
&gt; Pipes Provider, error: 40 - Could not open a connection to SQL Server)
&gt; (Microsoft SQL Server, Error: 53)

What else do I need to configure before connecting remotely? 

Troubleshooting
=====

I have been following the troubleshooting instructions [here][2]. Each blockquote below is a step described that that link.

&gt; Confirm the instance of the SQL Server Database Engine is installed
&gt; and running.

Done. We installed SQL Server Express, and it is running as a named instance called SQLEXPRESS. 

&gt; If you are attempting to connect to a named instance, make sure the
&gt; SQL Server Browser service is running.

Done. We followed the steps [here][3] to turn on the SQL Server Browser service.

&gt; Get the IP Address of the computer.

Done. We will use these later for testing connectivity and maybe for setting up a static port for SQLEXPRESS.

10.241.62.155

fe80::45c:8c29:e19f:f78b%15

&gt; Get the TCP port number used by SQL Server.

Done. The [SQL Server Management Studio][4] server logs showed that the server was listening on port 49169.

&gt; Enable Protocols

Done. We had already enabled TCP/IP in the configuration manager, but we restarted the SQL Server Service just in case.

&gt; Testing TCP/IP Connectivity

Done. We used [tcping.exe][5] to test connectivity (cmd ping doesn&#39;t work quickly with Azure.) We were able to connect to port 80.

 - tcping.exe buddha.cloudapp.net &gt; successful
 - tcping.exe buddha.cloudapp.net 80 &gt; successful

&gt; Testing a Local Connection

Done. We used [sqlcmd.exe][6] from the command prompt and were able to connect locally via TCP with a username and password.

 - sqlcmd -S Buddha\SQLEXPRESS (success via shared memory protocol)
 - sqlcmd -S tcp:Buddha\SQLEXPRESS (success via TCP)
 - sqlcmd -S tcp:Buddha\SQLEXPRESS -U sa -P &lt;password&gt; (success via TCP with username)
 - sqlcmd -S tcp:10.241.62.155\SQLEXPRESS -U sa -P &lt;password&gt; (success with internal IP)

&gt; Opening a Port in the Firewall

We opened the port on which we SQLEXPRESS listens. The server logs (above) showed that SQLEXPRESS was listening on port 49169, but this is just one of many dynamic ports, and we wanted to set up the static port 1435.

 - Use WF.msc to create an inbound TCP rule for port 1435.
 - Use Azure Management Portal to create a TCP endpoint for port 1435.

The troubleshooting instructions also say:

&gt; If you are connecting to a **named instance** or a port other than TCP
&gt; port 1433, you must also open the **UDP port 1434** for the SQL Server
&gt; Browser service.

Since we are connecting SQLEXPRESS (a named instance), we needed to open port 1434 for UDP.

 - Use WF.msc to create an inbound **UCP** rule for port 1434.
 - Use Azure Management Portal to create a **UDP** endpoint for port 1434

Further research about connecting to named instances revealed dynamic port issues. The reason why we are using port 1435 (static) instead of port 49169 (one of many effective options.)

&gt; Instances of SQL Server Express, SQL Server Compact, and named
&gt; instances of the Database Engine use dynamic ports. To configure these
&gt; instances to use a specific port, see [Configure a Server to Listen on
&gt; a Specific TCP Port (SQL Server Configuration Manager).][7] and
&gt; [here][8].

Done. We went to SQL Configuration Manager &gt; SQL Server Network Configuration &gt; Protocols for SQLEXPRESS &gt; TCP/IP, we did the following.

Protocol Tab &gt; Listen All &gt; NO.

IP Addresses Tab &gt; for each listed address

 - Enabled &gt; Yes
 - TCP Dynamic Ports &gt; Blank (delete the zero)
 - TCP Port &gt; 1435 (or your choice)

After restarting the SQLEXPRESS service, we again looked in the SQL Server Management Studio logs, and found that the Server is Listening on port 1435!!! Hooray!

&gt; Testing the Connection

Done. We opened SQL Server Management Studio on our local (non-Azure) computer and connected. 

 - buddha.cloudapp.net,1435 OR buddha.cloudapp.net\SQLEXPRESS
 - sa
 - password

Success.

  [1]: http://www.windowsazure.com/en-us/manage/windows/common-tasks/install-sql-server/#SSMS
  [2]: http://social.technet.microsoft.com/wiki/contents/articles/2102.how-to-troubleshoot-connecting-to-the-sql-server-database-engine.aspx
  [3]: http://msdn.microsoft.com/en-us/library/ms165734%28v=sql.90%29.aspx
  [4]: http://www.microsoft.com/en-ca/download/details.aspx?id=29062
  [5]: http://www.elifulkerson.com/projects/tcping.php
  [6]: http://msdn.microsoft.com/en-us/library/ms162773.aspx
  [7]: http://msdn.microsoft.com/en-us/library/ms177440.aspx
  [8]: http://blogs.msdn.com/b/sqlblog/archive/2009/07/17/how-to-configure-sql-server-to-listen-on-different-ports-on-different-ip-addresses.aspx

Use SQL Server Management Studio to connect remotely to an SQL Server Express instance hosted on an Azure Virtual Machine

How do you get `lsof` to produce numeric port information instead of attempting to resolve the port to service name?

For example, I want ``TCP *:http (LISTEN)`` to give me ``TCP *:80 (LISTEN)`` in-fact if at all possible I never want to see another service name in ``lsof`` print-out ever again.  So if there is a way to make numeric ports the default I would like to understand how to do that as well.

Content Type	Original Author	Original Content on Stackoverflow
Question	fredcrs	View Question on Stackoverflow
Solution 1 - Xmpp	Mark Byers	View Answer on Stackoverflow
Solution 2 - Xmpp	Justin Ethier	View Answer on Stackoverflow
Solution 3 - Xmpp	bear	View Answer on Stackoverflow
Solution 4 - Xmpp	user7177944	View Answer on Stackoverflow

Which port(s) does XMPP use?

Xmpp Problem Overview

Xmpp Solutions

Solution 1 - Xmpp

Solution 2 - Xmpp

Solution 3 - Xmpp

Solution 4 - Xmpp

Default Visual Studio 2010 and 2008 font

check if a string matches an IP address pattern in python?

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