Avenview RTERM Series - Manual (Page 46)

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Secondary SMTP configuration is also provided so that mail can be delivered even when the primary SMTP
server fails. Only when the primary SMTP server fails, the secondary SMTP server will be tried for mail
delivery.
3.2 IP Filtering
3.2.1 IP Filtering
The IP filtering function keeps unauthorized hosts from accessing to the IP serial console by specifying IP
filtering rules. It is important to fully understand what an IP filter is. If you don’t fully understand this, you will
get unexpected results against your original plan.
The IP address/Mask specifies the host range by entering base host IP address followed by / and subnet mask.
The host IP addresses to be filtered based on the rule defined. The table below gives examples of IP address /
Mask settings.
Specified Host Range Base Host IP Address Subnet Mask
Any host 0.0.0.0 0.0.0.0
192.168.1.120 192.168.1.120 255.255.255.255
192.168.1.1 ~ 192.168.1.254 192.168.1.0 255.255.255.0
192.168.0.1 ~ 192.168.255.254 192.168.0.0 255.255.0.0
192.168.1.1 ~ 192.168.1.126 192.168.1.0 255.255.255.128
192.168.1.129 ~ 192.168.1.254 192.168.1.128 255.255.255.128
The Port is a port or port range of the IP Serial Console which hosts try to access to.