Adder Technology AdderView CATx EPS-S8 - Manual (Page 43)

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Placing AdderView CATx IP behind a router or firewall
A.possible.point.of.contention.between.the.AdderView.CATx.IP.and.a.firewall.
can.occasionally.arise.over.the.use.of.IP.ports..Every.port.through.the.firewall.
represents.a.potential.point.of.attack.from.outside.and.so.it.is.advisable.to.
minimise.the.number.of.open.ports..The.AdderView.CATx.IP.usually.uses.two.
separate.port.numbers,.however,.these.are.easily.changeable.and.can.even.be.
combined.into.a.single.port.
IMPORTANT: The correct configuration of routers and firewalls requires
advanced networking skills and intimate knowledge of the particular network.
Adder Technology cannot provide specific advice on how to configure your
network devices and strongly recommend that such tasks are carried out by a
qualified professional.
Port settings
As.standard,.the.AdderView.CATx.IP.uses.two.
ports .to.support.its.two.types.of.
viewer:.
•. Port 80.for.users.making.contact.with.a.web.browser,.and.
•. Port 5900.for.those.using.the.VNC.viewer.
When.these.port.numbers.are.used,.VNC.viewers.and.web.browsers.will.locate.
the.AdderView.CATx.IP.correctly.using.only.its.network.address..The.firewall/
router.must.be.informed.to.transfer.any.traffic.requesting.these.port.numbers.
through.to.the.AdderView.CATx.IP..
When a web server is also on the local network
Port.80.is.the.standard.port.used.by.web.(HTTP).servers..If.the.AdderView.CATx.
IP.is.situated.within.a.local.network.that.also.includes.a.web.server.or.any.other.
device.serving.port.80.then,.if.you.want.to.use.the.web.browser.interface.from.
outside.the.local.network.environment,.the.HTTP.port.number.of.the.AdderView.
CATx.IP.may.need.to.be.changed.
When.you.change.the.HTTP.port.to.anything.other.than.80,.then.each.remote.
browser.user.will.need.to.specify.the.port.address.as.well.as.the.IP.address..For.
instance,.if.you.set.the.HTTP.port.to.‘8000’.and.the.IP.address.is.‘192.168.47.10’.
then.browser.users.will.need.to.enter:.
http://192.168.47.10 : 8000 .
(Note.the.single.colon.that.separates.the.IP.address.and.the.port.number)..
The.firewall/router.would.also.need.to.be.informed.to.transfer.all.traffic.to.the.
new.port.number.through.to.the.AdderView.CATx.IP.
If you need to change the VNC port number
If.you.change.the.VNC.port.to.anything.other.than.5900,.then.each.VNC.viewer.
user.will.need.to.specify.the.port.address.as.well.as.the.IP.address..For.instance,.
if.you.set.the.VNC.port.to.‘11590’.and.the.IP.address.is.‘192.168.47.10’.then.
VNC.viewer.users.will.need.to.enter:.
192.168.47.10 :: 11590
(Note.the.double.colons.that.separate.the.IP.address.and.port.number)..
The.firewall/router.would.also.need.to.be.informed.to.transfer.all.traffic.to.the.
new.port.number.through.to.the.AdderView.CATx.IP.
Addressing
When.the.AdderView.CATx.IP.is.situated.within.the.local.network,.you.will.need.
to.give.it.an.appropriate.local.IP.address,.IP.network.mask.and.default.gateway..
This.is.achieved.most.easily.using.the.DHCP.server.option.which.will.apply.
these.details.automatically..If.a.DHCP.server.is.not.available.on.the.network,.
then.these.details.need.to.be.applied.manually.in.accordance.with.the.network.
administrator.
The.firewall/router.must.then.be.informed.to.route.incoming.requests.to.port.
5900.or.port.80.(if.available).through.to.the.local.address.being.used.by.the.
AdderView.CATx.IP...
AdderView.CATx.IP.has.a.local.
address.and.net.mask,.i.e..
IP.address:.192.168.0.3
Net.mask:.255.255.255.0
Remote.user.with.VNC.viewer.
accesses.IP.address:.129.7.1.10.
and.automatically.uses.port.
5900..
Firewall/router address:
9...0
The.firewall.routes.the.
request.from.the.VNC.viewer.
on.port.5900.through.to.the.
AdderView.CATx.IP.at.local.
address.192.168.0.3
.