Qos (Quality Of Service) - A-Link WNAP4G User Manual

and log the DoS attack coming from the Internet. Currently, the router can detect
the following DoS attack: SYN Attack, WinNuke, Port Scan, Ping of Death, Land
Attack etc.
4. SPI mode:
incoming packet to verify if this packet is valid or not, and drop those invalid
packets.
5. Disable PPTP passthrough: The PPTP passthrough is enabled by default.
You can disable here.
6. Disable L2TP passthrough: The L2TP passthrough is enabled by default.
You can disable here.
7. Disable IPSec passthrough: The IPSec passthrough is enabled by default.
You can disable here.
8. Stealth Mode: If enable this option, router will become "hidden" if someone
uses port scan utility to scan available ports on this router.
Afterwards, click on "Save" to store your settings or click "Undo" to give up
the changes.

4.2 QoS (Quality of Service)

Quality of Service (QoS) helps to prioritize data as it enters your router. By attaching
special identification marks or headers to incoming packets, QoS determines which
queue the packets enter, based on priority. This is useful when there are certain types of
data you want to give higher priority to, such as voice data packets given higher priority
than Web data packets.
This router provides two types of Cross-layer QoS (support throughout Application/
A-LINK WNAP4G User Manual
You can enable this function and the router will check every
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