Chapter 15 Firewall
VMG1312-B Series User’s Guide
224
15.5 The DoS Screen
DoS ( Denial of Service) at t acks can flood your I nt ernet connect ion wit h invalid packet s and
connect ion request s, using so m uch bandwidt h and so m any resources t hat I nt ernet access
becom es unavailable.
Use t he
D oS
screen t o act ivat e prot ect ion against DoS at t acks. Click
Se cu r it y > Fir e w a ll > D oS
t o display t he following screen.
Figure 105
Securit y > Firewall > DoS
I P Type
Select w het her your I P t ype is
I Pv4
or
I Pv 6
.
Select Prot ocol
Select t he t ransport layer pr ot ocol t hat defines your cust om ized port from t he drop- dow n
list box. The specific pr ot ocol rule set s you add in t he
Se cu r it y > Fir e w a ll > Se r v ice >
Add
screen display in t his list .
I f you want t o configure a cust om ized prot ocol, select
Spe cific Se r v ice
.
Prot ocol
This field is displayed only when you select
Spe cific Pr ot ocol
in
Se le ct Pr ot ocol
.
Choose t he I P port (
TCP/ UD P
,
TCP
,
UD P
,
I CM P
, or
I CM Pv6
) t hat defines your cust om ized
port from t he drop- dow n list box.
Cust om Source
Port
This field is displayed only when you select
Spe cific Pr ot ocol
in
Se le ct Pr ot ocol
.
Ent er a single port num ber or t he range of por t num bers of t he sour ce.
Cust om
Dest inat ion Por t
This field is displayed only when you select
Spe cific Pr ot ocol
in
Se le ct Pr ot ocol
.
Ent er a single port num ber or t he range of port num bers of t he dest inat ion.
Policy
Use t he dr op- dow n list box t o select w het her t o discar d (
D ROP
) , deny and send an I CMP
dest inat ion- unreachable m essage t o t he sender of (
REJECT
) or allow t he passage of
(
ACCEPT
) packet s t hat m at ch t his rule.
Dir ect ion
Use t he dr op- dow n list box t o select t he dir ect ion of t raffic t o w hich t his r ule applies.
Enable Rat e
Lim it
Select t his check box t o set a lim it on t he upst r eam / dow nst r eam t ransm ission rat e for t he
specified prot ocol.
Specify how m any packet s per m inut e or second t he t ransm ission rat e is.
Scheduler Rules
Select a schedule rule for t his ACL rule form t he drop- dow n list box. You can configure a
new schedule rule by click
Add N e w Ru le
. This will bring you t o t he
Se cu r it y > Sch e du le r
Ru le s
screen.
Apply
Click
Apply
t o save your changes.
Cancel
Click
Ca n ce l
t o exit t his screen w it hout saving.
Table 76
Access Cont rol: Add/ Edit ( cont inued)
LABEL
DESCRIPTION
Summary of Contents for VMG1312-B Series
Page 4: ...Contents Overview VMG1312 B Series User s Guide 4 Troubleshooting 289 ...
Page 14: ...Table of Contents VMG1312 B Series User s Guide 14 ...
Page 15: ...15 PART I User s Guide ...
Page 16: ...16 ...
Page 30: ...Chapter 2 The Web Configurator VMG1312 B Series User s Guide 30 ...
Page 35: ...Chapter 4 Tutorials VMG1312 B Series User s Guide 35 7 Click Apply to save your settings ...
Page 77: ...77 PART II Technical Reference ...
Page 78: ...78 ...
Page 166: ...Chapter 9 Routing VMG1312 B Series User s Guide 166 ...
Page 184: ...Chapter 10 Quality of Service QoS VMG1312 B Series User s Guide 184 ...
Page 210: ...Chapter 13 Interface Group VMG1312 B Series User s Guide 210 ...
Page 226: ...Chapter 15 Firewall VMG1312 B Series User s Guide 226 ...
Page 232: ...Chapter 17 Parental Control VMG1312 B Series User s Guide 232 ...
Page 242: ...Chapter 19 Certificates VMG1312 B Series User s Guide 242 ...
Page 246: ...Chapter 20 Log VMG1312 B Series User s Guide 246 ...
Page 250: ...Chapter 21 Traffic Status VMG1312 B Series User s Guide 250 ...
Page 256: ...Chapter 24 IGMP Status VMG1312 B Series User s Guide 256 ...
Page 260: ...Chapter 25 xDSL Statistics VMG1312 B Series User s Guide 260 ...
Page 262: ...Chapter 26 User Account VMG1312 B Series User s Guide 262 ...
Page 268: ...Chapter 29 TR 064 VMG1312 B Series User s Guide 268 ...
Page 272: ...Chapter 30 Time Settings VMG1312 B Series User s Guide 272 ...
Page 278: ...Chapter 32 Logs Setting VMG1312 B Series User s Guide 278 ...
Page 296: ...Chapter 36 Troubleshooting VMG1312 B Series User s Guide 296 ...
Page 336: ...Appendix C Pop up Windows JavaScripts and Java Permissions VMG1312 B Series User s Guide 336 ...
Page 350: ...Appendix D Wireless LANs VMG1312 B Series User s Guide 350 ...
Page 374: ...VMG1312 B Series User s Guide 374 Index ...