ZyXEL Communications VMG1312-B Series User Manual page 222

Chapter 15 Firewall
The following t able describes t he labels in t his screen.
Table 75 Securit y > Firewall > Access Cont rol
LABEL
DoS Prot ect ion
Add new ACL
rule
#
Nam e
Src I P
Dst I P
Service
Act ion
Modify
222
DESCRIPTION
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.
Select t he En a ble check box t o enable prot ect ion against DoS at t acks.
Click t his t o go t o add a filt er rule for incom ing or out going I P t raffic.
This is t he index num ber of t he ent ry.
This displays t he nam e of t he rule.
This displays t he source I P addresses t o which t his rule applies. Please not e t hat a blank
source address is equivalent t o An y.
This displays t he dest inat ion I P addresses t o which t his rule applies. Please not e t hat a
blank dest inat ion address is equivalent t o An y.
This displays t he t ransport layer prot ocol t hat defines t he service and t he direct ion of t raffic
t o which t his rule applies.
This field displays whet her t he rule silent ly discards packet s ( D ROP) , discards packet s and
sends a TCP reset packet or an I CMP dest inat ion- unreachable m essage t o t he sender
( REJECT) or allows t he passage of packet s ( ACCEPT) .
Click t he Edit icon t o edit t he rule.
Click t he D e le t e icon t o delet e an exist ing rule. Not e t hat subsequent rules m ove up by one
when you t ake t his act ion.
Click t he M ove To icon t o change t he order of t he rule. Ent er t he num ber in t he # field.
VMG1312-B Series User's Guide