![]() ![]() So I have confusion(and what I have learnt)-:Īpplication gateway opens 2 TCP connection inbound and outbound and so does circuit gateway.Īpplication gateway just authenticates with username and password but circuit level gateway does not authenticate(then how does it trust the incoming and outgoing users), it is confusing.(or does it authenticates?) Many books are signaling it doesn't do it.Īpplication gateway doesn't examine the content(like packet filtering) and neither does circuit level gateway afaik. Plus the order in which they teach also would mean that circuit level gateway is better than application level gateway. ![]() but I've seen people saying circuit level gateway is more powerful than application level gateway. Whereas circuit level gateway only look up to network layer. ![]() The example was cool but it didn't make any sense later on to me.Īpplication level gateway can look up to all layers of OSI model Two different TCP connection are formed, inbound and outbound. Packet(from the internal network point of view). The circuit level gateway CHANGES the source ip address of outgoing ![]()
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