Configure an E-240W-A indoor ONT
104
7368 ISAM ONT E-240W-A Product Guide
3FE-46974-AAAA-TCZZA Issue: 01
Procedure 27 Firewall configuration
1 Select Security > Firewall from the top-level menu in the EPON Home Gateway window, as
shown in Figure 43.
Figure 43 Firewall window
Three security levels are available: Low, Medium, and High.
At the Low level, pre-routing is supported: port forwarding, DMZ, host application, and host
drop. Also supported are application services: DDNS, DHCP, DNS, H248, IGMP, NTP client,
SSH, Telnet, TFTP, TR-069, and VoIP.
At the Medium level, pre-routing is supported: port forwarding, DMZ, host application, and
host drop. Also supported are application services: DDNS, DHCP, DNS, H248, IGMP, NTP
client, TFTP, TR-069, and VoIP. The following types of ICMP messages are permitted: echo
request and reply, destination unreachable, and TTL exceeded. Other types of ICMP
messages are blocked. DNS proxy is supported from LAN to WAN but not from WAN to LAN.
At the High level, pre-routing and application services are not supported. UDP Port 8000 can
be used to access the services, for example FTP can use 8021 and Telnet can use 8023.
Regular UDP cannot be used. RG access is permitted via the LAN side but not via the WAN
side.
Table 29 describes the fields in the firewall window.
Table 29 Firewall parameters
Field Description
Security level Choose the security level from the drop-down menu: low, medium, or high
(1 of 2)
Release 06.00.00h | January 2019 | Edition 08
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