Chapter 5
Advanced Configuration
32
5.3 PORT
TRIGGERING
So me a p p lic a tio ns re q uire tha t the re mo te p a rtie s o p e n sp e c ific p o rts in the Co mp e x
MRL21E’ s fire wa ll fo r a c c e ss. Fo r insta nc e , a ssuming a n a p p lic a tio n use s p o rt 25 fo r
re q ue sts a nd p o rt 113 fo r re p lie s. If a PC o n the LAN c o nne c ts to p o rt 25 o n a re mo te
se rve r ho sting this a p p lic a tio n, using p o rt trig g e ring o n the Co mp e x MRL21E, inc o ming
c o nne c tio ns to p o rt 113 ( fro m the re mo te se rve r) c o uld b e re d ire c te d to the PC tha t
initia te d the re q ue st. A ma ximum o f 32 p o rt-trig g e ring e ntrie s c a n b e c o nfig ure d .
5.3.1 Setting up Port Triggering
1.
Clic k the
NAT
hyp e rlink o n the le ft
sid e o f the b ro wse r to se le c t
Port
Triggering
. The n the
NAT-Port
Triggering Setup
p a g e sho ws up .
2.
To se t up a ne w p o rt, c lic k
Add
. In
the NAT-Po rt Trig g e ring p a g e , yo u
c a n se t up a p o rt trig g e ring e ntry fo r
a kno wn a p p lic a tio n typ e b y
se le c ting a n a p p lic a tio n fro m the
d ro p d o wn me nu OR yo u c a n d e fine
a c usto m a p p lic a tio n thus:
Custom Applic ation:
De fine the na me o f the a p p lic a tio n fo r
whic h yo u wish to c o nfig ure p o rt
trig g e ring .
Trigge r Port Start
a nd
Trigge r Port End:
De fine the p o rt/ ra ng e o f p o rts fo r the
o utg o ing c o nne c tio ns tha t will c a use the
trig g e r.
Trigge r Protoc ol:
De fine the p ro to c o l typ e fo r the trig g e r
p o rt.
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