If you've not already done so.... (Assuming you're using XP) Make an "Exception" in Windows Firewall settings, for your application (exe file name) and the port number it listens on. Especialy if it needs to accept incoming data from outside the physical (or virtual) PC.
*Usually* XP's "Windows firewall" does not affect anything communicating locally with the "Localhost" address (127.0.0.1) But it's a common trip point, when things work locally, but not when part is running on another PC. Another hint, use different ports to listen on, and talk with. That helps enormously when poth parts of the scheme are on the same physical PC. Even if you are trying to communicate between two PC's, their firewall's only need to know about their "Incoming" data ports, they will pass outgoing traffic with no problem. That relates to XP's own internal (Windows) firewall, in general if you use something else (instead of, or as well as) it may need to be set to allow "outgoing" traffic as well, Zone Alarm is one such, though that will popup and tell you if something is trying to send stuff to the "internet"... Note! If you have ZoneAlarm, even if you "Disable" the ZA firewall at boot time, it has a habit of blocking everything, as all you disable is the client, not the service, and it seems if the service is running in the background, but you've not let the client start, it blocks stuff by default. Safe, but so frustrating at times!.. UDP, fun when it works, less so when it doesn't! > -----Original Message----- > From: zayin [mailto:[EMAIL PROTECTED] > Sent: Sunday, April 06, 2008 10:06 PM > To: 'ICS support mailing' > Subject: Re: [twsocket] UDP Newbie... > > > Hi, > > No virus programs. Windows firewall is on. > > Thanks for all the help, > > Mark > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Wilfried Mestdagh > Sent: Sunday, April 06, 2008 2:24 PM > To: ICS support mailing > Subject: Re: [twsocket] UDP Newbie... > > Hello Mark, > > Do you have virus software or things like that running? If so > stop all services. It could be that some virus / firewall > software does strange things. Some of those software are very buggy ! > > --- > Rgds, Wilfried [TeamICS] > http://www.overbyte.be/eng/overbyte/teamics.html > http://www.mestdagh.biz > > Sunday, April 6, 2008, 21:02, zayin wrote: > > > > Hi, > > > The port is not open. > > > And yes "should " is the operative word. > > > Ciao, > > > Mark > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Dod > > Sent: Sunday, April 06, 2008 1:55 PM > > To: ICS support mailing > > Subject: Re: [twsocket] UDP Newbie... > > > Hello zayin, > > > I tried same sample as Wilfried and its OK for me. > > > Are you sure your port was not in use at the time you tried > to start > > the program ? > > > "netstat -an" will show you all opened/listening port. > > > if none is listening on your port then you application > should "listen". > > > regards. > > >>>Did you try the code that I have posted? > > z>> Yes, copy and paste with: > > z>> ...raised exception ESocketException with message Error 10049 in > z>> function bind address not available. > > z>> Changing the ip address or port does not change the > error. It gives > z>> the error on the "listen". > > z>> Minutes later.... > > z>> Now after playing with the settings, changing port, ip > address etc > z>> it > > works. > > > z>> Does not make since. > > z>> Windows firewall did appear for unblocking permission. > > z>> Minutes later.... > > z>> Now, back to my testing application and changing connect > to listen > z>> generates the same error. > > z>> Going back to connect, all if working again. > > z>> Something I do not understand is going on. > > > z>> Ciao, > > z>> Mark > > > > > z>> -----Original Message----- > z>> From: [EMAIL PROTECTED] > z>> [mailto:[EMAIL PROTECTED] On Behalf Of > Wilfried Mestdagh > z>> Sent: Sunday, April 06, 2008 12:27 PM > z>> To: ICS support mailing > z>> Subject: Re: [twsocket] UDP Newbie... > > z>> Hello Mark, > > z>> if you look into source code you see that SendStr call > Send, so it > z>> is exacly the same. I used SendStr just because I was lazy :) I > z>> tryed it on a machine with an older version of ICS, but > it is exacly > z>> same result with latest version. Did you try the code that I have > posted? > > z>> It should work, then try Send or other options. > > z>> --- > z>> Rgds, Wilfried [TeamICS] > z>> http://www.overbyte.be/eng/overbyte/teamics.html > z>> http://www.mestdagh.biz > > z>> Sunday, April 6, 2008, 15:34, zayin wrote: > > > >>> Hello, > > >>> How about with send and not sendStr? > > >>> That is the only difference I see. > > >>> And what version of ICS are you using? > > >>> Cheers, > > >>> Mark > > > > >>> -----Original Message----- > >>> From: [EMAIL PROTECTED] > >>> [mailto:[EMAIL PROTECTED] On Behalf Of > Wilfried Mestdagh > >>> Sent: Sunday, April 06, 2008 4:57 AM > >>> To: ICS support mailing > >>> Subject: Re: [twsocket] UDP Newbie... > > >>> Hello Mark, > > >>> I tryed to do the same as you listen with IP addres of > same machine, > >>> and when I click the button, 'Hello' is received. This is the > >>> complete > z>> unit: > > >>> unit Unit1; > > >>> interface > > >>> uses > >>> Windows, Messages, SysUtils, Variants, Classes, Graphics, > >>> Controls, > z>> Forms, > >>> Dialogs, StdCtrls, WSocket; > > >>> type > >>> TForm1 = class(TForm) > >>> WSocket1: TWSocket; > >>> Button1: TButton; > >>> procedure Button1Click(Sender: TObject); > >>> procedure WSocket1DataAvailable(Sender: TObject; > ErrCode: Word); > >>> procedure FormCreate(Sender: TObject); > >>> private > >>> end; > > >>> var > >>> Form1: TForm1; > > >>> implementation > > >>> {$R *.dfm} > > >>> procedure TForm1.FormCreate(Sender: TObject); begin > >>> AllocConsole; > >>> end; > > >>> procedure TForm1.Button1Click(Sender: TObject); begin > >>> WSocket1.Addr := '192.168.0.11'; > >>> WSocket1.Port := '47808'; > >>> WSocket1.Proto := 'udp'; > >>> WSocket1.Listen; > >>> WSocket1.SendStr('Hello'); > >>> end; > > >>> procedure TForm1.WSocket1DataAvailable(Sender: TObject; ErrCode: > >>> Word); begin > >>> WriteLn(TWSocket(Sender).ReceiveStr); > >>> end; > > >>> end. > > >>> --- > >>> Rgds, Wilfried [TeamICS] > >>> http://www.overbyte.be/eng/overbyte/teamics.html > >>> http://www.mestdagh.biz > > >>> -- > >>> To unsubscribe or change your settings for TWSocket mailing list > >>> please goto > >>> http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket > >>> Visit our website at http://www.overbyte.be > > > z>> -- > z>> To unsubscribe or change your settings for TWSocket mailing list > z>> please goto > z>> http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket > z>> Visit our website at http://www.overbyte.be > > > > -- > > To unsubscribe or change your settings for TWSocket mailing list > > please goto > http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket > > Visit our website at http://www.overbyte.be > > > -- > To unsubscribe or change your settings for TWSocket mailing > list please goto > http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket > Visit our website at http://www.overbyte.be > > > This mail has been scanned by Palmer Cook Computer Services Limited. www.palmercook.co.uk -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
