Security 13-7

Internet service

TCP port

Internet service

TCP port

 

 

 

 

 

 

 

 

FTP

20/21

Finger

79

 

 

 

 

Telnet

23

World Wide Web

80

 

 

 

 

SMTP (mail)

25

News

144

 

 

 

 

Gopher

70

rlogin

513

 

 

 

 

 

 

 

 

Internet service

UDP port

Internet service

UDP port

 

 

 

 

 

 

 

 

Who Is

43

AppleTalk Routing

202

 

 

Maintenance (at-rtmp)

 

 

 

 

 

World Wide Web

80

AppleTalk Name Binding

202

 

 

(at-nbp)

 

 

 

 

 

SNMP

161

AURP (AppleTalk)

387

 

 

 

 

TFTP

69

who

513

 

 

 

 

Port number comparisons

A filter can also use a comparison option to evaluate a packet’s source or destination port number. The comparison options are:

No Compare: No comparison of the port number specified in the filter with the packet’s port number.

Not Equal To: For the filter to match, the packet’s port number cannot equal the port number specified in the filter.

Less Than: For the filter to match, the packet’s port number must be less than the port number specified in the filter.

Less Than or Equal: For the filter to match, the packet’s port number must be less than or equal to the port number specified in the filter.

Equal: For the filter to match, the packet’s port number must equal the port number specified in the filter.

Greater Than: For the filter to match, the packet’s port number must be greater than the port number specified in the filter.

Greater Than or Equal: For the filter to match, the packet’s port number must be greater than or equal to the port number specified in the filter.

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Netopia 4752 manual Internet service TCP port, Aurp AppleTalk 387, Who 513, Port number comparisons

4752 specifications

The Netopia 4752 is a versatile networking device that serves as a digital subscriber line (DSL) modem and router, designed to provide high-speed internet connectivity and advanced networking capabilities for home and small office environments. This device is notable for its reliability and ease of use, making it a popular choice among users looking for seamless internet access.

One of the main features of the Netopia 4752 is its support for various DSL technologies, including ADSL and ADSL2+. This compatibility ensures that users can achieve optimal bandwidth and speed, even on legacy DSL lines. The modem’s capability to handle downstream speeds of up to 24 Mbps allows for smooth streaming, gaming, and browsing experiences.

Equipped with a robust built-in router, the Netopia 4752 offers multiple Ethernet ports for direct wired connections, accommodating multiple devices simultaneously. This feature is especially beneficial in environments where multiple users need to access the internet without latency. Additionally, the device supports wireless connectivity, enabling users to connect their laptops, smartphones, and other Wi-Fi-enabled devices effortlessly.

Security is a crucial aspect of the Netopia 4752’s functionality. The device incorporates a built-in firewall and supports various security protocols, including WPA and WPA2, ensuring that users’ data remains protected from unauthorized access. The user-friendly web-based interface facilitates easy configuration of security settings, making it accessible even for those with limited technical knowledge.

The Netopia 4752 also features advanced Quality of Service (QoS) settings that allow users to prioritize bandwidth for specific applications or devices. This capability is crucial for households or offices that demand high performance for video conferencing, streaming services, or online gaming.

In terms of characteristics, the Netopia 4752 boasts a compact form factor, making it easy to integrate into any workspace without occupying much space. Its durable design ensures longevity, providing reliable service over time.

Overall, the Netopia 4752 stands out as a dependable DSL modem and router solution, with its high-speed internet capabilities, security features, and flexible connectivity options suitable for both home and small office users who require efficient and effective internet access.