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Full Discussion: DDoS and brute force attack
Special Forums Cybersecurity DDoS and brute force attack Post 302885990 by cjcox on Wednesday 29th of January 2014 10:26:31 AM
Old 01-29-2014
DDoS is simply a way to overload services. So, to protect, you use some kind of QoS or application based limiter that slows things down when heavy traffic seems present. In some cases you may be able to figure out the DDoS and limit things specifically.

Brute force attacks are often times focused on services where a username/password are involved. Again, you'll have to craft a response to this specifically. So, if you see so many failed attempts from a source, you could issue a command to your firewall to add a rule to block that source (perhaps just temporarily). As an example of a tool to help with this, look at: 302 Found
 

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LEARN ABOUT NETBSD

urlphy

URL(4)							   BSD Kernel Interfaces Manual 						    URL(4)

NAME

     url -- Realtek RTL8150L USB Ethernet driver

SYNOPSIS

     url*    at uhub?
     urlphy* at mii?

DESCRIPTION

     The url driver provides support for USB Ethernet adapters based on the Realtek RTL8150L USB-ether bridge chip.

     The url driver supports the following adapters:

	   CompUSA USBKR100
	   GreenHouse GH-USB100B
	   Melco Inc. LUA-KTX
	   Sitecom LN013

     For more information on configuring this device, see ifconfig(8).

DIAGNOSTICS

     url%d: watchdog timeout  A packet was queued for transmission and a transmit command was issued, however the device failed to acknowledge the
     transmission before a timeout expired.

     url%d: no memory for rx list  The driver failed to allocate an mbuf for the receiver ring.

SEE ALSO

     arp(4), mii(4), netintro(4), usb(4), ifconfig(8)

HISTORY

     The url device driver first appeared in NetBSD 1.6.

AUTHORS

     The url driver was written by Shingo WATANABE <nabe@nabechan.org>.

BSD
								September 18, 2006							       BSD
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