Application gateway and its advantages and disadvantages

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Networking - Explain Application gateway. Advantages and disadvantages of Application gateway - Jan 30, 2010 at 18:00 pm by Vidya Sagar

Explain Application gateway. Advantages and disadvantages of Application gateway. 

Application gateway is one of the firewall systems. A service is provided by different processes which maintain complete TCP connection state and sequencing. Re-addressing of traffic for outgoing traffic appears to have originated from the firewall, is performed often.

The following are the advantages of Application Level Gateways:

- Direct connections between internal and external hosts are disallowed.
- User-level authentication is supported.
- The application commands are analyzed inside the payload portion of the data packets.

The following are the disadvantages of Application Level Gateways:

- Slower than packet filters
- Needs the internal client to know about them.
- Every possible type of connection can not be supported 

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