OM-WEB Series User's Guide
Specifications
39
Network protocols
Table 18. Factory default specifications
Parameter
Conditions
Protocols implemented
IP, ARP, ICMP, DHCP, UDP, TCP, NBNS, HTTP
Protocols using UDP or TCP for transport communicate on their IETF assigned ports
(for example HTTP on TCP port 80).
UDP messaging protocol
UDP port 54211
TCP downloading protocol
TCP port 54267
HTTP 1.0 alternate port
TCP port 49152-65535 (not including 54267)
Network name
OM-WEB-TC: OMWEBTC_xxxxx
OM-WEB-TEMP: OMWEBTEMP_xxxxx
where xxxxx is the device serial number
Network name publication
via NBNS (responds to b-node broadcasts, therefore only available on the local subnet)
Max number of simultaneous
HTTP connections
3
Max number of non-HTTP
TCP sockets
5
Network security
Table 19. Factory default specifications
Parameter
Conditions
Security implementation
IP address based session manager with user-name/password login for configuration and
control transactions (data is not secured.)
Session timeout
5 minutes with no activity
User-name/password
encryption (Note 17)
Base64
Vulnerabilities
Denial of service attacks, user-name/password spoofing, script probing and simple
decryption.
Note 17:
The default web page does not support encryption if Javascript is disabled in the web browser.
LED displays and the factory reset button
Table 20. LED and button configurations
Parameter
Conditions
POWER/COMM LED (top)
4.75 V < Vext < 5.25 V:
On
Vext < 4.75 V, Vext > 5.25 V:
Off (power fault)
Blinks during microcontroller communications.
LINK/ACTTIVITY LED
(bottom)
On when there is a valid Ethernet connection, and blinks when an Ethernet packet is sent
or received.
Factory reset button
When held for 3 seconds, the POWER LED will turn off for a short time, indicating a
reset is in process. When the POWER LED turns back on, reset is complete and the
factory default network settings have been restored.
