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Firewall
" Firewall will only allow external hosts to send packets on existing open TCP connections or connections that are being opened (by internal hosts) but not allow them to open TCP connections to hosts in the private network" What problem will arise, if it open TCP connections to hosts in the private network ?

asked Jun 7 in Computer Networks by srestha Veteran (91.8k points) | 32 views

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GATE2011-2
A layer-$4$ firewall (a device that can look at all protocol headers up to the transport layer) CANNOT block entire $\text{HTTP}$ traffic during $9:00PM$ and $5:00AM$ block all $\text{ICMP}$ traffic stop incoming traffic from specific $\text{IP}$ address but allow ... to the same IP address block $\text{TCP}$ traffic from a specific user on a multi-user system during $9:00PM$ to $5:00AM$

asked Sep 29, 2014 in Computer Networks by jothee Veteran (99.8k points) | 4k views

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