Vigor2862 Series User’s Guide
441
V
V
I
I
-
-
1
1
-
-
3
3
D
D
e
e
f
f
e
e
n
n
s
s
e
e
S
S
e
e
t
t
u
u
p
p
As a sub-functionality of IP Filter/Firewall, there are 15 types of detect/ defense function in
the DoS Defense setup. The DoS Defense functionality is disabled for default.
V
V
I
I
-
-
1
1
-
-
3
3
-
-
1
1
D
D
o
o
S
S
D
D
e
e
f
f
e
e
n
n
s
s
e
e
Click Firewall and click DoS Defense to open the setup page.
Available settings are explained as follows:
Item Description
Enable Dos Defense
Check the box to activate the DoS Defense Functionality.
Select All - Click this button to select all the items listed
below.
White/Black List Option – Set white/black list of IPv4/IPv6
address.
Enable SYN flood defense
Check the box to activate the SYN flood defense function.
Once detecting the Threshold of the TCP SYN packets from
the Internet has exceeded the defined value, the Vigor
router will start to randomly discard the subsequent TCP
SYN packets for a period defined in Timeout. The goal for
this is prevent the TCP SYN packets’ attempt to exhaust the
limited-resource of Vigor router.
By default, the threshold and timeout values are set to
2000 packets per second and 10 seconds, respectively. That
means, when 2000 packets per second received, they will
be regarded as “attack event” and the session will be
paused for 10 seconds.
Summary of Contents for Vigor2862 Series
Page 1: ......
Page 13: ...Vigor2862 Series User s Guide xiii Index 962...
Page 14: ......
Page 16: ......
Page 80: ...Vigor2862 Series User s Guide 64...
Page 189: ...Vigor2862 Series User s Guide 173...
Page 255: ...Vigor2862 Series User s Guide 239...
Page 302: ...Vigor2862 Series User s Guide 286 This page is left blank...
Page 336: ...Vigor2862 Series User s Guide 320 This page is left blank...
Page 525: ...Vigor2862 Series User s Guide 509...
Page 530: ...Vigor2862 Series User s Guide 514...
Page 601: ...Vigor2862 Series User s Guide 585...
Page 613: ...Vigor2862 Series User s Guide 597...
Page 712: ...Vigor2862 Series User s Guide 696...
Page 746: ...Vigor2862 Series User s Guide 730...
Page 753: ...Vigor2862 Series User s Guide 737...
Page 757: ...Vigor2862 Series User s Guide 741...
Page 759: ...Vigor2862 Series User s Guide 743 P Pa ar rt t X X T Te el ln ne et t C Co om mm ma an nd ds s...