TOPEX Bytton (HSPA+ / LTE)
ByttonLTE(full)_genericUsermanual_sw306FAS_revN.1.docx
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Advanced Iptables Add
This link provides you access to a console where you can add and edit rules for routing:
Figure 5-108: Example and explanations for Advanced Iptables Add firewall rules.
The firewall and advanced packet routing can be configured using the
iptables
commands. For more
information, see
http://www.netfilter.org
.
Warning!
Please remember that if you change the default values you may compromise your network
security by allowing entrusted access. These configuration options need an advanced level of knowledge
regarding network security and Linux kernel packet handling.
Note:
As you may see, the visible settings of the NAT/firewall configuration page are quite few. This
happens because the basic rules for address translation and packet filtering
are already defined
, and
they are not directly accessible to the user. Since they can’t be changed, they are not visible!
What you see are the additional rules, the ones that you are allowed to modify, to supplement or delete.
The firmware of Bytton LTE automatically installs the basic rules that are required. For instance, if you
enable the Webcam feature, the firmware opens the port 2000 for TCP traffic, if you enable the NTP
service it opens port 123 for UDP traffic, and so on.