BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  How to determine what port to use?          BorlandTalk.com Forum Index -> C++ Builder (Internet Socket) View previous topic :: View next topic   Author Message David Pratt Guest Posted: Wed Feb 28, 2007 7:09 am    Post subject: How to determine what port to use? I have been researching this for a couple of days, and as the subject line suggests, am new to network programming. Trying to figure out what the parameters/standards on winsock port numbers are, how they are determined and what they are used for, etc. Any tutorials out there or guidance to such would be much appreciated. Back to top Eduardo Jauch Guest Posted: Wed Feb 28, 2007 7:25 am    Post subject: Re: How to determine what port to use? David Pratt escreveu: Quote: I have been researching this for a couple of days, and as the subject line suggests, am new to network programming. Trying to figure out what the parameters/standards on winsock port numbers are, how they are determined and what they are used for, etc. Any tutorials out there or guidance to such would be much appreciated. If you look on google and search for "winsock tutorial" you will find lots of stuff. Some are really good :) Eduardo Back to top Bob Gonder Guest Posted: Wed Feb 28, 2007 8:25 am    Post subject: Re: How to determine what port to use? David Pratt wrote: Quote: I have been researching this for a couple of days, and as the subject line suggests, am new to network programming. Trying to figure out what the parameters/standards on winsock port numbers are, how they are determined and what they are used for, etc. Any tutorials out there or guidance to such would be much appreciated. If for internal useage, just about any non-standard port should suffice (unless, of course, you are trying to do standard stuff). If you are out to build a large international app, then you might register with iana For my app, I selected a large unused port as my default, but allowed the user to set their own in case of in-the-field conflicts. The keeper of the ports: http://www.iana.org/assignments/port-numbers Something that came up with Google "tcp/ip ports": http://www.chebucto.ns.ca/~rakerman/port-table.html Well-Known TCP Port Numbers: http://www.webopedia.com/quick_ref/portnumbers.asp Back to top David Pratt Guest Posted: Wed Feb 28, 2007 9:10 am    Post subject: Re: How to determine what port to use? "Bob Gonder" <notbg (AT) notmindspring (DOT) invalid> wrote in message news:mcp9u2ltre7ltdjcvigv5u26o2uas8i6mq (AT) 4ax (DOT) com... Quote: David Pratt wrote: I have been researching this for a couple of days, and as the subject line suggests, am new to network programming. Trying to figure out what the parameters/standards on winsock port numbers are, how they are determined and what they are used for, etc. Any tutorials out there or guidance to such would be much appreciated. If for internal useage, just about any non-standard port should suffice (unless, of course, you are trying to do standard stuff). If you are out to build a large international app, then you might register with iana For my app, I selected a large unused port as my default, but allowed the user to set their own in case of in-the-field conflicts. The keeper of the ports: http://www.iana.org/assignments/port-numbers Something that came up with Google "tcp/ip ports": http://www.chebucto.ns.ca/~rakerman/port-table.html Well-Known TCP Port Numbers: http://www.webopedia.com/quick_ref/portnumbers.asp Thanks so much, Bob. Precisely what I was looking for. I would rather not muck around with reserved ports and inadvertantly crash my system through ignorance Back to top Jason Tribbeck Guest Posted: Thu Apr 05, 2007 12:19 am    Post subject: Re: How to determine what port to use? David Pratt wrote: Quote: Thanks so much, Bob. Precisely what I was looking for. I would rather not muck around with reserved ports and inadvertantly crash my system through ignorance That would be quite difficult to do (if you're listening): - If the port is in use, you wouldn't be able to listen in on it - If the port isn't in use, it probably won't be If you're happy to get the OS to assign a port, then you can use the magic number "0". Otherwise, ports > 4096 aren't often in use. If you're opening to send, then you could have problems connecting to assigned ports (although in these "high security" days, if you send then stuff they don't understand, they should either ignore it, or close the socket. Of course, this isn't guaranteed ). -- ..sig MIA Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         BorlandTalk.com Forum Index -> C++ Builder (Internet Socket) All times are GMT Page 1 of 1   Jump to: Select a forum C++ Builder Newsgroups----------------C++ BuilderC++ Builder (ActiveX)C++ Builder (Announcements)C++ Builder (Command Line Tools)C++ Builder DatabasesC++ Builder Databases (ADO)C++ Builder Databases (Desktop)C++ Builder Databases (InterBase Express)C++ Builder Databases (Multi-Tier)C++ Builder Databases (SQL Servers)C++ Builder (Graphics)C++ Builder (IDE)C++ Builder (Internet)C++ Builder (Internet Socket)C++ Builder (Internet Web)C++ Builder (Jobs)C++ Builder (Language)C++ Builder (Language C++)C++ Builder (Compatibility with MFC)C++ Builder (Native API)C++ Builder (Non-Technical)C++ Builder (Students)C++ Builder (Third Party Tools)C++ Builder (Upgrade)C++ Builder (VCL)C++ Builder (VCL Components Usage)C++ Builder (VCL Components Development)C++ Builder (VCL Usage)C++ Builder (WinAPI)C++ Builder Installation Delphi Newsgroups----------------Delphi (General)Delphi ActiveX Controls UsageDelphi ActiveX Controls DevelopmentDelphi As400Delphi DatabasesDelphi Databases (ADO)Delphi Databases (dbExpress)Delphi Databases (Desktop)Delphi Databases (InterBase Express)Delphi Databases (Multi-Tier)Delphi Databases (SQL Servers)Delphi DeploymentDelphi GraphicsDelphi IDEDelphi InternationalizationDelphi InternetDelphi Internet Isapi-WebBrokerDelphi Internet WebSnapDelphi Internet WinsockDelphi JobsDelphi Language BASMDelphi Language ObjectPascalDelphi Model Driven Architecture (General)Delphi Model Driven Architecture (Third Party)Delphi MultimediaDelphi Native APIDelphi Non-TechnicalDelphi ObjectPascalDelphi OLE AutomationDelphi OO designDelphi OpenToolsAPIDelphi Reporting-ChartingDelphi RTLDelphi StudentsDelphi TeamSourceDelphi Thirdparty ToolsDelphi Thirdparty Tools (General)Delphi Thirdparty Tools (IntraWeb)Delphi Thirdparty Tools (RaveReports)Delphi UpgradeDelphi VCLDelphi VCL ComponentsDelphi VCL Components UsingDelphi VCL Components WritingDelphi WebServices SOAPDelphi WinAPIDelphi XMLDelphi Installationcomp.lang.pascal.delphi.components.misccomp.lang.pascal.delphi.components.usagecomp.lang.pascal.delphi.components.writingcomp.lang.pascal.delphi.databasescomp.lang.pascal.delphi.misccomp.sources.delphi JBuilder Newsgroups----------------JBuilderJBuilder AnnouncementsJBuilder Applet IssuesJBuilder As400JBuilder CompilerJBuilder CORBA/RMIJBuilder DatabasesJBuilder DB SwingJBuilder DebuggerJBuilder DeploymentJBuilder DocumentationJBuilder EnterpriseJBuilder HandheldJBuilder IDEJBuilder JavaJBuilder JavaAPIJBuilder Java LanguageJBuilder Java SwingJBuilder Java BeansJBuilder Java Beans UsageJBuilder Java Beans DevelopmentJBuilder JBCLJBuilder JDataStoreJBuilder JobsJBuilder LinuxJBuilder MacintoshJBuilder & MobileSetJBuilder MultiLingual AppsJBuilder Non-TechnicalJBuilder OpenToolsJBuilder Servlets (JSP)JBuilder StudentsJBuilder Team DevelopmentJBuilder Thirdparty ToolsJBuilder UpgradeJBuilder Installation InterBase Newsgroups----------------InterBaseInterBase Bug DiscussionInterBase GeneralInterBase IBConsoleInterBase OpenSourceInterBase ReplicationInterBase SQLInterBase ThirdpartyInterBase Installation Miscellaneous Borland Newsgroups----------------AppCenterAppServerEnteraVisiBroker  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.