Technical data

Annexes

Ping and Scan methods

ePowerSwitch 8XM has two methods to check whether an IP equipment (PC, server, router, Webcam...) is

still alive:

Address Pinging

The first method uses the well-known Ping command whereby a request is sent to a specific IP address. The

Ping command, which is an echo request, enables you to determine through an ICMP protocol (Internet

Control Message Protocol) if an IP device is available on the network. If the system reacts to this request,

ePowerSwitch 8XM knows that the TCP/IP connection is established. If the system does not react to one or

several requests, ePowerSwitch 8XM can automatically switch off and after a specified delay switch it again

on (Reboot function).

Port Scanning

The second method uses the Port Scan command to test a specific TCP/IP port. In other words, this

command allows you to find out if a specific protocol is available on a server (for example HTTP, FTP,

Telnet, SMTP, and POP...). ePowerSwitch 8XM simply tries to connect to a specific server port. If the

connection is possible, ePowerSwitch 8XM knows that a server program is running there. If the connection is

not possible, ePowerSwitch 8XM can automatically switch off and after a specified delay switch again on the

IP equipment (Reboot).

Remarks:

- The Supervision function works only if the ePowerSwitch 8XM is disconnected from the LAN.

- The Ping and Scan functions can be used separately or together.

- The network route between ePowerSwitch 8XM and the IP device you wish to supervise should be as

direct as possible, so do not use unnecessary routers and complex wiring between them. A problem on a

router or the wiring could reboot the IP device to supervise.

- Execute several Pings and/or Scans before running the Reboot function. It could be possible that the IP

device doesn't respond although is still working.

- Choose a realistic supervision cycle. One second is possible, however it’s not necessary to overload the

network with Ping and Scan requests.

Recommended values

 Interval between Requests: 10 sec or more

 Number of unsuccessful Requests before Reboot: 3 or more

 Delay before Reboot: 10 sec or more

 Delay before restarting monitoring after Reboot: 120 sec or more

Commonly used ports

TCP 25

This port is used to deliver e-mails over SMTP (Simple Mail Transfer Protocol).

TCP 80

This port is used for http connections.

The ePowerSwitch 8XM ONLY uses Secure Port 443 (HTTPS).

Ensure that your Firewall / Router is configured to allow HTTPS to pass through.

UDP 123

This port is used to allow time synchronization over NTP (Network Time Protocol).

TCP 443

This port is used to allow SSL support (Secure Socket Layer).

UDP 514

This port is used to deliver Syslog messages.