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Mailing lists / lazarus / 2013-06

Library or Unit that can help to check network connectivity.

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Eric Kom

Good day Dear,

Please I am currently looking for library/unit that I can use to check network connectivity.

Hoping I will find a help.

Kind Regards Eric Kom System Administrator & Programmer - Metropolitan College _________________________________________ / You are scrupulously honest, frank, and \ | straightforward. Therefore you have few | \ friends. / ----------------------------------------- \ \ .--. |o_o | |:_/ | // \ \ (| Kom | ) /'\_ _/`\ \___)=(___/ 2 Hennie Van Till, White River, 1240 Tel: 013 750 2255 | Fax: 013 750 0105 | Cell: 078 879 1334 | www.kom.za.net | www.kom.za.org | www.erickom.co.za Key fingerprint: 513E E91A C243 3020 8735 09BB 2DBC 5AD7 A9DA 1EF5

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Antonio Fortuny
to Graeme Geldenhuys

Le 25/06/2013 10:24, Graeme Geldenhuys a ?crit :

Show quoted text 5 lines
On 2013-06-25 08:29, Antonio Fortuny wrote: > Indy + TIdIcmpClient then Ping. Not all systems on a network will reply to a ping test? I know my systems don't, because I disabled it for security reasons.

That's right. You only have to use a well known internal or external machine which will answer ping requests, i.e. 8.8.8.8 always responds to ICMP ping rquests.
You can even check wether the internal connection works by choosing a well known internal machine.
This way will make you sure that you either have an access to the intra or extra network or none.

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Regards, - Graeme - -- _______________________________________________ Lazarus mailing list http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
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Paul Breneman
to Eric Kom: Please I am currently looking for library/unit that I can use to check network…
Eric Kom wrote 7 lines
Good day Dear, Please I am currently looking for library/unit that I can use to check network connectivity. Hoping I will find a help.

The other replies about doing pings look good. About 15 years ago I wrote up an answer to this question:
http://www.brenemanlabs.com/iConnect.htm

My answer also has some clues for the old days when using a modem to call an ISP but pinging is discussed at the bottom. :)

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