sharing across different lans

hi all.i dono much abt networking and sharing in lan.but i want to know some points.have a look at this picture.i think we r getting internet from sify by this method only(dono exactly 🤔 ).all i want to know is how to transfer files in differnt lans above the limits.is it possible?.if yes what is the procedure(p2p?) and what tools we need.help pls(correct the mistakes if there r any)thanks

Don't see anything conceptually wrong with the diagram as per my observations of the Sify network.The box titled Sify probably includes the SAM server, DHCP server, Proxy server etc. etc. I think it is possible for computers on different LANs to contact eachother directly as long as the concerned LANs are behind one such specific set of "gateway to the internet" servers. These servers ofcourse serve a limited geographical area like one city etc.This is because often I get logs on my firewall from 10.x.x.x ips which are not from my LAN. Ofcourse most of the Sify ips logged are the external ip variety i.e. 202.117.x.x and the like. But since some of the 10.x.x.x kind of ips aren't shown in their external IP format I figure they get to me before they get to the Sify servers, that is they are able to directly contact my LAN from some other LAN.I guess any P2P application would work in such a scenario and you wouldn't be held back by your package speeds and limits. All you'd have to do is enter your friend's 10.x.x.x IP in the P2P program. The specifics of this would probably be better explained by my friends on this forum who are file sharing and download experts 😛.

thanks for ur reply.waiting for others....

i got it.Lancast is a feature which enables eMule Plus to work better on a LAN. It makes eMule Plus broadcast (UDP multicast) its shares onto the LAN. Other Lancast enabled eMule clients will listen for these broadcasts and download files at a much faster speeds using their private IP addresses. Lancast doesn't break eMule Plus as a p2p application it just adds to it, promotes more sharing and saves upload and download bandwidth in LAN environments. Lancast transfer speeds are not limited by upload/download limits.this means we can share files over lan(same or different lans? dono exactly).with max available speed(no limit).this function is available in emule plus new version.we have to enable this option in connection tab.reply me if some one know more details abt it

where to get this software....

http://emuleplus.info/
best p2p tool i ever seen

Okay, iam downloading this software right now.....tell me how to configure it so that we can share files over 2 different LANS

me and my friend just tested(on diff lans).but still its not working.so i posted a question in their forum(emule's).and waiting for reply.

and lancast can be enabled from
preferences--->connection---->connection--click on enable lancast.

if u want to use lancast try to connect a public server(look at servers tab).
and for further details http://emuleplus.info/forum/
@google_singh
thanks for ur response.i suggest first u try this tool on ur lan(if u have any friend).and then we can go for different lans
* i can't test it on my lan bcz i have no friends 🙁

i think google_singh we can test this software. since im in delhi too lemme know ur ip range

The original post is not quite correct. By 'Sify' (I @$$ume you mean the gateway computer based on your diagram) is technically on the local lan. The gateway is connected to a router which may be connected to other routers (speed to the gateway is limited by your OS and ethernet card speed if the line is not damaged). Suprisingly though the gateway is used to authenticate the login, internet traffic p@$$es only through the router which is also on the same network. From the router I think sify has some head office in madras where it is actually connected to the internet (I may be wrong on this one). Speeds between 10.*.*.* are technically supposed to be 0 but there seem to be some exceptions, most likely those lan's have been connected for some reason. 10.same.*.* can vary but you will most likely get a decent speed. 10.same.same.* computers' speed is limited only by OS and ethernet card speed so things like 2.5 MBps transfers are possible (from experience).As far as I know this is correct but there is a chance that I could be wrong 🙂

I have no friends too on my LAN......

Anand I don't quite agree with you 😉 .

With Sify we all have LANs with their respective gateways. Immediately beyond the neighborhood LAN Sify's network is implemented by using what's called PMP (Point To Multipoint). See the following quote and the accompanying web-page from where I quote :-
After evaluating a host of technology options, the company opted for a wireless broadband technology called Point to Multi-Point technology (PMP), which enables customers to be linked through a wireless radio network.[/b]
--from http://www.expresscomputeronline.com/20021209/cover.shtml

Thereafter visit this link to see a layout of PMP systems http://rawcon.org/rawcon99/soltesz.pdf.

Thus immediately after a neighborhood LAN what we have is a Subscriber Unit (SU) which is also a Wireless Broadband router. Here's a photo of one such SU --http://www.axxcelera.com/online/ab_access.html

This SU wirelessly connects to a Base Station where there's the Access Point which is another Wireless Broadband router-- http://www.sifybroadband.com/ctv_operator.html

Now no authentication is done on a LAN gateway. All authentication is done on the SAM server which for each of us lies beyond the Access Point somewhere.

We seem to have different SAM servers between different cities and even within a city. But I believe there's a mechanism of sharing information between them, hence the Sify claim for us to be able to login from anywhere in India where Sify is present.

Beyond the above mentioned Access Point not only is authentication handled, but also bandwidth management on per user basis is done (giving us sh***y speeds and imposing limits on us) and external IPs are @$$igned to us (using DHCP).

So my conclusion is that all the computers on the Sify network which are behind the SAM server should be able to communicate with eachother directly without logging in. People with internal IPs 10.same.x.x usually should be behind one SAM server only and be able to connect with eachother directly. But then some cities might have started to have more than one SAM server, for eg. Delhi, and this could cause problems even when the internal IPs remain of the same form.

Oops I was confusing the gateway with the SAM server. What I meant was that the login info is sent to the SAM server but internet traffic seems to flow through only the routers. Is that right?Also I just vaguely mentioned how actually this vast network of computers is connected to the internet so your point of 'Immediately beyond the neighborhood LAN Sify's network is implemented by using what's called PMP ' is just adding new information not correcting mine.

The things on which I disagreed with you were the diagram posted (I find it to be correct) and where the authentication is done 😉.

I am pretty much sure that all our internet traffic p@$$es through the SAM server. This I know from this site-- http://visualroute.visualware.com. This site provides a facility to do a traceroute from the site's servers in the US to our computers wherever we are. So it's like the DOS tracert command with its direction reversed 😉.

Infact what I saw by using the above mentioned site is that the SAM server is the last server on the Sify Network. So the SAM server is really our gateway to the internet as Sify customers 🙂

Your mspaint skillz are awesome dude B)