COMPUTER THREATS SECURITY
WHAT IS A FIREWALL IN NETWORK SECURITY
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Question
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iptables-t filter-A INPUT-s 59.45.175.62-j REJECTWhat is the function of this rule?
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Any packet coming from 59.45.175.62 will be blocked and a “connection reset” or a “destination host unreachable” packet will be sent.
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Any packet coming from 59.45.175.62 will be blocked without any reply
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Any packet send to 59.45.175.62 will be blocked
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Any packet send to 59.45.175.62 will be blocked with reply
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Explanation:
Detailed explanation-1: -IPTables Rules Rules are placed within a specific chain of a specific table. As each chain is called, the packet in question will be checked against each rule within the chain in order. Each rule has a matching component and an action component.
Detailed explanation-2: -Iptables is an interface that uses Netfilter to classify and act on packets.
Detailed explanation-3: -iptables is a user-space utility program that allows a system administrator to configure the IP packet filter rules of the Linux kernel firewall, implemented as different Netfilter modules. The filters are organized in different tables, which contain chains of rules for how to treat network traffic packets.
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