Tech Support > Computers & Technology > Internet & Broadband > default gateway question
default gateway question
Posted by strangelove on December 19th, 2007



Hi,

I noticed that my router's default gateway is 192.168.0.1 - that's ok i
understand about ip's reserved for lans. However the router says in its
setup that I have another default gateway which is my IP with the last
octet as 1 ie a.b.c.1 where my ip is a.b.c.d

Ok, what's the point of this one?

thanks.


Posted by strangelove on December 19th, 2007


On Wed, 19 Dec 2007 09:26:32 +0000, strangelove wrote:

BY IP I mean my router's WAN IP.


Posted by Graham J on December 19th, 2007



"strangelove" <strangelove@pavement.bicycle.sex> wrote in message
news:fkao48$otp$1@news.datemas.de...
There are two quite separate networks, and the function of your router is to
join them together.

On the "inside" of your router, your Local Area Network (LAN) comprises a
port on the router, and the various computers you have connected to the
router. In the router a function called the DHCP server issues IP addresses
to the computers on the LAN. The IP address of the router is fixed in its
setup screen. The DHCP server issues several paramaters to the requesting
computer, amongst which are:

1) the IP address for that computer
2) the IP address that the computer must use as its "default gateway". This
is the address that the computer uses when it recognises that it needs to
send a packet to another computer not on the Local Network. This is the IP
address of the router.

On the "outside" of your router, the Wide Area Network (WAN) comprises
another port on the router and the connection to your ISP. (Logically
speaking) at your ISP there is another DHCP server. It responds to your
router by issuing it with an IP address, and a default gateway on the ISP's
network. Your router therefore sends packets addressed to other computers
not on the WAN to this default gateway, where in turn another (more
sophisticated) router works out how to forward your packet to the correct
destination. Google for a more detailed and accurate description of theis
process.

The job of your router is to forward packets arriving on its internal LAN
port (from a local computer) across itself and out of the WAN port. This is
what the word "route" means. The router also keeps details of the recently
forwarded packets. When incoming packets arrive at the WAN port, the router
checks that they are legitimate responses to outgoing packets and forwards
them to the computer on the LAN which made the original request. In this
the router functions as a simple firewall: it only allows in packets which
are legitimate responses to outgoing traffic.

--
Graham J



Posted by strangelove on December 19th, 2007


On Wed, 19 Dec 2007 10:09:45 +0000, Graham J wrote:

Now answer my question instead of cutting and pasting bollox. And remember
I am familiar with lans and the use of internal IP's.




Posted by PeeGee on December 19th, 2007


strangelove wrote:
In that case you should know the answer.

PeeGee
--
The reply address is a spam trap. All mail is reported as spam.
"Nothing should be able to load itself onto a computer without the
knowledge or consent of the computer user. Software should also be able
to be removed from a computer easily."
Peter Cullen, Microsoft Chief Privacy Strategist (Computing 18 Aug 05)

Posted by steveybar on December 19th, 2007



"strangelove" <strangelove@pavement.bicycle.sex> wrote in message
news:fkas1t$tkf$2@news.datemas.de...
What a rude, ungrateful prat you are.






Posted by ABC on December 19th, 2007



"strangelove" <strangelove@pavement.bicycle.sex> wrote in message
news:fkas1t$tkf$2@news.datemas.de...

Then you will know the answer. Why don't you google it instead of flaming
the person who tried to help you.



Posted by The Natural Philosopher on December 19th, 2007


strangelove wrote:
wants to send data. That changes according to where it is.

Your local net forwards all (non local) stuff to 192.168.0.1,because
that is your router.,

Your router howeever,needs to forward all its non localt stuff not to
itself, but up the line to your ISP. So IT has a default route pointing
there.

Once inside the ISP, the routers there will in all probability run OSPF
which they will use to carry routing tables around inside the network,
and then probably have one or more default routes to other ISPs via one
or more boundary routers that WILL carry full internet wide routing
tables and use BGP to interface to other ISPS.

Thank your starts you don't have to know anything about all that, and
have only two default routes to worry about..





Posted by Bob Eager on December 19th, 2007


On Wed, 19 Dec 2007 10:33:33 UTC, strangelove
<strangelove@pavement.bicycle.sex> wrote:

Then do it yourself instead of being objectionable.

--
[ 7'ism - a condition by which the sufferer experiences an inability
to give concise answers, express reasoned argument or opinion.
Usually accompanied by silly noises and gestures - incurable, early
euthanasia recommended. ]

Posted by John on December 19th, 2007



"strangelove" <strangelove@pavement.bicycle.sex> wrote in message
news:fkas1t$tkf$2@news.datemas.de...
You ungrateful pillock. Mind you, anyone who has an email addy like that has
got to be a plonker.



Posted by HVS on December 19th, 2007


On 19 Dec 2007, John wrote

It never ceases to amaze me that prats like this seem to think that
slagging others off is an effective way to get people to co-operate
with them.

It's people like this that deservedly get their soup pissed in by
waiters, innit....

--
Cheers,
Harvey

Posted by JamesB on December 19th, 2007



"Graham J" <graham@nospam.zen.co.uk> wrote in message
news:4768ede4$0$13931$fa0fcedb@news.zen.co.uk...

Excellent reply Graham, shame the o.p. is a cock.


Posted by Graham J on December 19th, 2007



"JamesB" <jamesb@somewhere.com.net.com.net> wrote in message
news:4769380f$0$8412$db0fefd9@news.zen.co.uk...
[snip]

Thank you - at least somebody appreciates my efforts

--
Graham J



Posted by Mark McIntyre on December 19th, 2007


strangelove wrote:
The question was answered.

If this were true, you'd know the answer to your original question.

Perhaps you should consider humility instead of insults?



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