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commonuseforthisfunctionalityistoaddSSLencryptionto
anincomingTCPconnectionpriortosendingitalongtothe
remotehost.
TheNetworkTranslationtableisusedtodefinenetwork
mappingsforTCPpipes.Youmustfirstspecifytheincoming
TCPporttowhichyourdeviceorapplicationwillconnect.
Then,youmustspecifytheoutgoinghostnameanddestination
TCPportfortheTCPpipe.
YoucanalsospecifythesourceTCPportfortheoutgoingTCP
connection.Usually,thisshouldbesetto0toallowautomatic
selectionofthesourceport.However,ifyouhaveafirewall
thatimposeslimitsonsourceTCPportsthenyoumayneedto
setthistosomethingspecific.Notethatifyouspecify
somethingotherthan0,youwillbelimitedtoonly1TCPpipe
atatimeforanygivendestinationport.
Protocol Settings
Foreachhost(peer)youwillmakeanoutgoingconnectionto,
youneedtospecifytheprotocoloptionsusedforthathost.For
eachhost,selecttheHostfromthe“Editsettingsforadifferent
peer”selectionbox.Select“Ad d anewpeerdefinition”linkto
addanewhost.
Figure 2-7: RJ-11 IP Gateway: Protocol Settings
ThehostsareidentifiedbytheirIPaddressorHostnameand
TCPport.Youmayalsospecifywildcards.Specifichostnames
and/orportnumberstakeprecedenceoverthewildcards.An
asteriskfortheIPaddress/hostname(forinstance“*:443”)