VEGA LUCOM EDGE router ER75i v2 SL USER’S GUIDE - Manual (Page 48)

CONFIGURATION
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Attention! We recommend checking the GPRS connection in case of uninterrupted
running.
Annotation:
•
MTU (Maximum Transmission Unit) – it is the identifier of the maximum size
of packet, which is possible to transfer in a given environment.
•
MRU (Maximum Receiving Unit) – it is the identifier of the maximum size
of packet, which is possible to receive in a given environment.
Default value is 1500 bytes. O ther settings may cause incorrect transmission of data.
6.10. Firewall Configuration
By the help of a firewall it is possible to set IP addresses from which are possible
to remotely access the router. The choice Allow remote access only from specified hosts
is given for easier configuration of hosts. In this firewall configuration it is possible to set up
to four remote accesses by the help of Source, Source IP Address, Protocol and Target Port.
Parameter Source defines if access is allowed to one IP address which is defined
by Source IP Address, or every IP addresses. In menu Protocol it is possible to specify
protocol for remote access, it is possible to allow all protocols (all), or only one protocol UDP,
TCP
or ICMP. By parameter Target Port it is possible to specify a port number.
The changes in settings will apply after pressing the Apply button.
Caution! Firewall doesn’t filter via Ethernet.
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