Some ideas: - is the IP address used during the ping the same as the address used in the URL when it works? Maybe the symbolic name resolves to a different IP. - does the source machine (the client machine) use several network interfaces? Maybe the source binding is different for symbolic vs direct IP and not all interfaces are equally able. - is there a firewall (or other form of network traffic control) in place? - is there a VPN involved?
I've seen this message with OpenSwan-based VPN when the tunnel is down for some reason. ----- Original Message ----- From: "YAMACO Software" <yam...@yamaco.cz> To: "'ICS support mailing'" <firstname.lastname@example.org> Sent: Wednesday, February 24, 2010 5:27 PM Subject: Re: [twsocket] URL translation Hello, customer reports that ping towards concerned server is OK but an error message "Service is unavailable" appears. Thanks for any idea. Karel Ing. Karel Janeček, MBA ================================ = YAMACO Software = aplikační software, softwarové služby = Prostějovičky 79, 798 03 Plumlov, Czech Republic = IČ 484 63 850, DIČ CZ6612301300 = tel./fax: +420 582 393 605 = tel.: +420 731 616 511 = http://www.yamaco.cz = HelpDesk: http://helpdesk.yamaco.cz = LinkedIn: http://www.linkedin.com/in/yamaco = Skype: yamaco.software = ISDS: ebbd5wr =============================== > -----Original Message----- > From: twsocket-boun...@elists.org > [mailto:twsocket-boun...@elists.org] On Behalf Of Francois PIETTE > Sent: Monday, February 22, 2010 5:42 PM > To: ICS support mailing > Subject: Re: [twsocket] URL translation > > > >one of my customers has following problem: if he uses an IP > address in > >URL (HTTPCli), connection to the server is OK. Nevertheless > while using > >valid server name instead IP address (for example municipality1), > >connection is not possible. Does not know anybody what is it > caused by > >and how to solve it ? > > This is related to name resolution. > But what is the exact error message ? > > What happend when your customer ping the server name ? > Doesn't matter if the server doesn't reply to the ping > command, what is > important here is that ping is able or not to resolve the hostname. > > -- > francois.pie...@overbyte.be > The author of the freeware multi-tier middleware MidWare > The author of the freeware Internet Component Suite (ICS) > 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 -- 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