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Template:Networking rutos manual firewall (view source)
Revision as of 11:58, 19 August 2020
, 11:58, 19 August 2020no edit summary
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==Summary==
==Summary==
The <b>Reset</b> button resets the custom rules field to its default state.
The <b>Reset</b> button resets the custom rules field to its default state.
==Attack Prevention==
==Attack Prevention==
</tr>
</tr>
</table>
</table>
{{#ifeq: {{{series}}} | RUTX |
==Helpers==
The <b>Helpers</b> section provides you with the possibility to add firewall exceptions for some VoIP protocols, namely SIP and H.323. In other words, these functions provide a pass-through for VoIP communications between the device's LAN and WAN.
<b>Technical explanation:</b>
FTP, SIP and H.323 protocols are harder to filter by firewalls since they violate layering by introducing OSI layer 3/4 parameters in the OSI layer 7. NAT helpers are modules that are able to assist the firewall in tracking these protocols. These helpers create the so-called expectations that can be used to open necessary ports for RELATED connections. For example, FTP, GRE and PPTP helpers are enabled by default.
[[File:Networking_rutos_manual_firewall_helpers_nat_helpers.png|border|class=tlt-border]]
<table class="nd-mantable">
<tr>
<th>Field</th>
<th>Value</th>
<th>Description</th>
</tr>
<tr>
<td>H323</td>
<td>off <nowiki>|</nowiki> on; default: <b>off</b></td>
<td>Turns H323 filtering on or off.</td>
</tr>
<tr>
<td>SIP</td>
<td>off <nowiki>|</nowiki> on; default: <b>off</b></td>
<td>Turns SIP filtering on or off.</td>
</tr>
</table>
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[[Category:{{{name}}} Network section]]
[[Category:{{{name}}} Network section]]
