Hello all,
Is it possible to UDP IP spoofing with twsocket component?
Not that I'm trying to create a security threat - it's used
in UDP firewall traversal, commonly used in VOIP apps.
I think I should be able to do it with raw socket but it
doesn't really work very reliably (and it doesn't work
Hello Arno,
Is it possible to UDP IP spoofing with twsocket component?
The only possibility is to use raw sockets with any component
built around winsock API.
You may want to use WinPCap instead
which allows sending raw packets as well.
I see. In that case I suppose I can still use ICS
It seems that some components are not included in ICS v5
project file. For example, DnsQuery. Was this intentional?
Thanks,
Jack
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My understanding is that it works on certain types of NAT firewalls.
On these NATs, an external port is mapped to an internal IP:Port.
If this is the case, all packets going to that external port will
go to the internet IP:Port.
Making it work is not that simple though, with the difficult part
It looks like HttpTst User-Agent header is triggering
the firewall on the web server. Use another User-Agent string,
it will go through.
Hey,
I got a strange problem, I am downloading (XML) news from
different website, and it all was working for a long time. But now
it won't download anymore
Hello all,
ICS TWSocket only has a SessionClosed event for close of
connection. I suppose a socket.close() from the remote side
(or local) will trigger this event. I wonder if shutdown(0/1/2)
will also trigger the event? For example, a browser using
HTTP/1.0 often sends a request then does a
Hello Francois and Arno for the replies.
I read online that on Unix, close() reduce a ref count for
a socket. The last close() will call shutdown() automatically.
I'm not sure if the same is true on Windows but I would think
so because it makes sense and the whole TCP/IP thing starts on
Unix
I was reading TLS's wikipedia page the other day. I find
that although it's a lot of work, it is probably not
too bad to write the SSL handshake and encryption from
scratch, say, with ICS. I must be seriously overlooking
the details and complexities. I wonder what are the potential
issues of
that is standard in
unix world, with contributers like IBM etc.?
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Arno Garrels [TeamICS]
http://www.overbyte.be/eng/overbyte/teamics.html
jlist wrote:
I was reading TLS's wikipedia page the other day. I find
that although it's a lot of work, it is probably not
too bad to write the SSL
Although I was a contributor ICS SSL, I haven't really got to play
with it. I gave it a try last night with V6 and had a few questions.
1. I see two sets of .bdsproj files in Vc32 folder, one with Ssl
in the file names and have USE_SSL;USE_ZLIB_OBJ defined, one without.
Should I install both to
Hello Arno,
Thanks for the reply.
3. After I generated the cert files, HttpsTst demo worked fine. My
question here is, is there an easy way to use an embedded cert and key
string, as opposed to external files? I notice that the SslContext
class takes file names.
No way, however both are
Hello Arno,
Usually you do not need a certificate to connect to a SSL server.
Your client might however communicate with multiple servers requesting
a client certificate. If that is case leave both properties unassigned
and handle event OnSslCliCertRequest instead, this is demonstrated in
Thanks Arno, for the example. I'll give it a try.
Private Key and certificate may exist in the same file.
It's not a method in TX509Base, however you can derive your
own class and add this functionality. Something like below
should do the trick:
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