Thanks for the help, Truman.
I am using the NDIS3 packet driver. I have it
installed on the system. All I want now is some C/C++
code to capture packets. That is what I need help
with. I would appreciate any sites/reference material
on that. I need to somehow capture packets from the
LAN. I have the packet driver installed so I dont
think that should be a problem. but my main problem
is, there were plenty of such packet capture routines
for Unix, and lots for something called "FreeBSD"
(pardon the ignorance).. but I need a windows based
routine.. I am running Win98.
Thanks, please help!
--- Truman Boyes <[EMAIL PROTECTED]>
wrote:
> ciao,
>
> generally firewalling is done in the kernel as
> opposed to userland
> tools. i do not doubt that it is possible to build a
> firewall with java,
> but for any practical purpose i would not recommend
> you go with this
> language or route. for efficiency reasons, the
> kernel is where you want to
> handle packet forwarding and blocking. there is
> plenty of source code
> available from a variety of free operating systems
> that you may want to
> review.
>
> if you do decide to build your firewall in userland,
> you will probably
> need a device driver to read packets.
>
> cheers,
> .truman.boyes.
> On Fri, 30 Mar 2001, Prep Cards wrote:
>
> > Hi folks.
> >
> > I just joined this list, and that is because I
> have
> > taken up a project in senior college to code a
> > firewall under Java. The firewall will be put on
> my
> > college LAN. It will be on a per-node basis, i.e,
> the
> > software will be on each node instead of a proxy
> > server. I need to block out sites on the criteria
> of
> > IP, and content too. I need help really starting
> from
> > scratch, since we havent started coding yet. What
> we
> > have worked out so far, is that we need to capture
> > data packets flowing in to the node from the main
> hub
> > of college. Please help me out here, how do I
> capture
> > packets using C/C++/Java? The packet analysis part
> > will be considerably easier, but I need help with
> > actual capture of packets.
> >
> > Thanks a lot,
> >
> > Manish.
> >
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