What is the difference between rejecting and dropping traffic?

In summary; use REJECT to disallow trusted hosts by gracefully informing them that the traffic is not allowed to pass, and use DROP in an attempt to cause delays and disruption to a no so persistent attacker by sending their packets into a black hole without any response for them to analyse.

What is the difference between reject and drop in terms of Iptable?

The difference is that the REJECT target sends a reject response to the source, while the DROP target sends nothing. This can be useful e.g. for the ident service. If you use REJECT then the clients doesn’t need to wait for timeout. The DROP target doesn’t send nothing.

Which provides better protection dropping a packet or rejecting it why?

Silently dropping the packet is almost always the better choice, for three reasons. First, sending an error response doubles the network traffic. The majority of dropped packets are dropped because they are malevolent, not because they represent an innocent attempt to access a service you don’t happen to offer.

What is the difference between firewall deny and drop?

The difference between deny and drop is that deny will make a router (or other device) send an ICMP type 3 (destination unreachable) message response back, where drop will not notify the sending party that the device has be denied and just silently drop the traffic. This is a standard and was created in RFC1122.

What is drop packet deny?

DROP (aka DENY, BLACKHOLE) Prohibit a packet from passing. Send no response.

Which of the following best describes the difference between the drop and reject targets in iptables?

The difference between DROP and REJECT, is that with REJECT, a “connection reset” for TCP and a “destination host unreachable” for UDP/ICMP is sent to the packet source, while DROP dictates that nothing is to be sent to the packet source.

Why is drop more secure than reject?

A common reason for using DROP rather than REJECT is to avoid giving away information about which ports are open, however, discarding packets gives away exactly as much information as the rejection. With REJECT, you do your scan and categorise the results into “connection established” and “connection rejected”.

What is a firewall drop?

This specifies the action that the firewall should do in the event that a piece of network traffic matches a rule. Accept means to allow the traffic through, reject means to block the traffic but reply with an “unreachable” error, and drop means to block the traffic and send no reply.

Why would a router drop packets?

The reason for packet loss could be the inefficiency of a component such as a loose cable connection, a faulty router, or a lousy Wi-Fi signal. Sometimes bandwidth restrictions, both intentional and unintentional, can lead to packet loss or latency. Unsuccessful packets lead to network slowdowns and cause bottlenecks.

Why do routers drop packets?

The most common cause of packet loss on a network is overloaded network devices. Switches and routers will drop data packets if they cannot process them in time. Other major packet loss causes include faulty equipment and cabling.

Why do you think there are the two similar options of reject as well as drop in the iptables rules?

What happens when snort rejects a packet?

The rule action tells Snort what to do when it finds a packet that matches the rule criteria. reject – block the packet, log it, and then send a TCP reset if the protocol is TCP or an ICMP port unreachable message if the protocol is UDP.

Should I drop or reject unwanted packets?

Send no response. In the rules there is a choice of whether to REJECT or to DROP unwanted packets.When analysing this choice, we must consider negative and positive features for legitimate and illegitimate applications. The big difference between REJECT and DROP is that REJECT results in an ICMP error being returned.

What is the difference between drop and reject command?

Difference between DROP and REJECT Both DROP and REJECT prohibits packets from passing through the firewall. But, the main difference between them is the response message. Actually, when we use the DROP command, it will not forward the packet or answer it.

What is the difference between ‘connection refused’ and ‘drop packet’?

‘Connection refused’ means: ‘there is a server here’, and possibly gives away more information, whereas dropping a packet doesn’t give away clues about software versions, possible vulnerabilities or even the fact that a server is listening at you IP. The above is one of the main reasons to use DROP instead of REJECT.

What is the difference between drop and reject in firewall?

Both DROP and REJECT prohibits packets from passing through the firewall. But, the main difference between them is the response message. Actually, when we use the DROP command, it will not forward the packet or answer it. But, simply drops the packet silently. And, no indication is sent to the client or server.