Firewall
The firewall script acts as a firewall. It can be enabled for services sush as HTTP, FTP, SSH and SNMP.
Variables
These are the read-only pre-defined variables available for each connection that is established.
Variable |
Type |
Example |
Description |
|---|---|---|---|
$family |
string |
“ipv4” |
IP family of connecting client (“ipv4” or “ipv6”) |
$protocol |
string |
“tcp” |
IP protocol of local server (“tcp” or “udp”) |
$service |
string |
“ssh” |
Name of local service (“ssh”, “snmp”, “ftp” or “httpserver:X”) |
$senderip |
string |
“192.168.1.11” |
IP address of connecting client |
$senderport |
number |
41666 |
TCP/UDP port of connecting client |
$serverip |
string |
“10.0.0.1” |
IP address of local server |
$serverport |
number |
22 |
TCP/UDP port of local server |
Functions
- firewall.Allow()
Allow IP connection to be established.
- Returns
doesn’t return, script is terminated
- firewall.Block()
Block IP connection from being established.
- Returns
doesn’t return, script is terminated
On script error
On script error Block() is called.
On implicit termination
If not explicitly terminated then Allow() is called.