re: TCP/UDP relay vs. SOCKS64

["CTO YAN Renxiang" <Renxiang.Yan@alcatel-sbell.com.cn>]

On Fri, 24 Dec 2004, Pekka Savola [mailto:pekkas@netcore.fi] wrote:

> 
> 
> On Thu, 23 Dec 2004, CTO YAN Renxiang wrote:
> > Both TCP/UDP relay and SOCKS64 are implemented by 
> forwarding connection to a relay server.
> > TCP/UDP relay is forwarded by router, and relay in relay server.
> > SOCKS64 is forwarded in source host, and relay in SOCKS64 server.
> >
> > Does anyone can tell the essential differences between this 
> two mechanism?
> > They can be used in which kind of different cases?
> 
> The most fundamental difference is that socks requires the 
> application to be "socksified" by a modification or a library.  TCP/UDP does not.

Yes, but what's the most important between "socksified" connection and "non-socksified" connection?
When do we need a "socksifed" connection and when does not?  For the security only?

> 
> > Another issue is:
> >
> > In RFC 3142, it states:
> >
> >   TRT is designed to require no extra modification on IPv6-only
> >   initiating hosts, nor that on IPv4-only destination hosts.
> >
> > but in fact, the host is required modification, e.g. DNS resolver.
> 
> Modification is not needed on the *host* _itself_, it can 
> also be done in the DNS resolver.

What did you mean by " *host* _itself_"? 

> 
> And there is no change needed if TRT is used for specific services 
> only, i.e., the IPv6 addresses of the services are entered in the DNS 
> manually.
> 
> -- 
> Pekka Savola                 "You each name yourselves king, yet the
> Netcore Oy                    kingdom bleeds."
> Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings
>