Compare this to a TCP check that connects to the port and if the connection works flags it as being up.
With UDP you can't connect to a port, so the most used way to check a UDP port is to send something to the UDP port and IF you get an ICMP frame back saying that the port is unreachable then you assume it as being down. If you don't get anything back you assume it as being up. BUT most firewalls for example will stop that ICMP frame from coming through and thus it will look like all UDP ports that you check through a firewall are up. That's also in the readme file that is included with the install. Dirk. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of David Walters Sent: Fri Jun 14 9:05 AM To: '[EMAIL PROTECTED]' Subject: RE: [SA-list] Generic UDP port connection test (BETA) Wot does this actually do.... As in wot does it test? David Walters IT Support Officer DSC Central -----Original Message----- From: Dirk Bulinckx [mailto:[EMAIL PROTECTED]] Sent: Friday, 14 June 2002 1:39 PM To: [EMAIL PROTECTED] Subject: RE: [SA-list] Generic UDP port connection test (BETA) chkUDP external UDP checker for Servers Alive (http://www.woodstone.nu/soft/beta/setup_chkudp.exe) Dirk. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of David Walters Sent: Fri Jun 14 5:41 AM To: '[EMAIL PROTECTED]' Subject: RE: [SA-list] Generic UDP port connection test (BETA) where can I get this UDP beta ? -----Original Message----- From: Dirk Bulinckx [mailto:[EMAIL PROTECTED]] Sent: Thursday, 13 June 2002 5:10 AM To: [EMAIL PROTECTED] Subject: RE: [SA-list] Generic UDP port connection test (BETA) last message was yesterday.... Dirk. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of gene Martinez Sent: Wed Jun 12 10:59 PM To: [EMAIL PROTECTED] Subject: RE: [SA-list] Generic UDP port connection test (BETA) What happened to the list?? I haven't seen any messages in days????? At 06:21 AM 6/10/02 -0400, you wrote: >>>> <?smaller>Try this. This is where the default install puts chkudp.exe<?/smaller> <?smaller>c:\program files\woodstone\udp\chkudp.exe /host=MyServer /port=67 /timeout=25<?/smaller> <?smaller>This is one I use. The object has a timeout of 30 seconds.<?/smaller> <?smaller>Port 67 is DHCP<?/smaller> <?smaller>Hope this helps<?/smaller> <?smaller>Doug Woznicki<?/smaller> <?smaller>Senior NT Systems Administrator<?/smaller> <?smaller>Pioneer - Standard Electronics Inc.<?/smaller> Regards, Gene [EMAIL PROTECTED] [EMAIL PROTECTED] http://www.eclipse.net/~njkat To unsubscribe from a list, send a mail message to [EMAIL PROTECTED] With the following in the body of the message: unsubscribe SAlive To unsubscribe from a list, send a mail message to [EMAIL PROTECTED] With the following in the body of the message: unsubscribe SAlive To unsubscribe from a list, send a mail message to [EMAIL PROTECTED] With the following in the body of the message: unsubscribe SAlive To unsubscribe from a list, send a mail message to [EMAIL PROTECTED] With the following in the body of the message: unsubscribe SAlive To unsubscribe from a list, send a mail message to [EMAIL PROTECTED] With the following in the body of the message: unsubscribe SAlive
