Re: tcp connection
On Sat, Jun 17, 2000 at 12:43:45AM -0400, Chris Wagner wrote: > At 10:48 PM 6/16/00 -0500, Sanjeev Gupta wrote: > >Sockets? Butyou would definitely have seen this more than a couple of > >times. > > No, not sockets, sockets are way down on the stack. This is the protocol > that says what the octets mean and do. It's the common thread among all the > high level protocols and is directly below them in the stack. But I can't > think of the darn name. What I think you're thinking of is just IP. You probably haven't been seeing it, because there is no concept of connection in TCP/IP stacks until you hit TCP, but here's how your connection kinda works (at least on 2 *nix boxen): peer<-->socket filehandle<-->transport<-->socket filehandle<-->peer "transport" here can be one of many things, such as: socket fd<-->unix domain socket<-->socket fd or socket fd<-->TCP<-->IP<-->ip transport(LAN/PPP/X.25/SmokeSignals)<- ->IP<-->TCP<-->socket fd Now, if you actually mean "what octets mean and do", those are actually defined higher than TCP, and are laid out in the specs for those respective protocols. i.e.: Telnet Protocol: RFC 854/855 FTP:RFC 959 TFTP: RFC 1350 POP3: RFC 1939 HTTP/1.1: RFC 2068 Hope that helps. -- Love is like a friendship caught on fire. In the beginning a flame, very pretty, often hot and fierce, but still only light and flickering. As love grows older, our hearts mature and our love becomes as coals, deep-burning and unquenchable. -- Bruce Lee ** Penguin Sympathizer Bryon Roche, Kain <[EMAIL PROTECTED]> pgpGsUHT5B6qS.pgp Description: PGP signature
Re: VPN recomendations
On Wed, Sep 13, 2000 at 10:58:15PM -0700, Luca Filipozzi wrote: > On Thu, Sep 14, 2000 at 01:42:26AM -0400, Kim O wrote: > > was just wondering what the best way is to do VPN between linux servers in > > different places to establish a small private network over public > > infrastructure. packages,software or howtos appreciated. There is also pipsecd, IIRC.. userland, IPSEC compliant.. Not quite as versatile or populer as FreeS/WAN, but just about as good a choice. Note that if you are using FreeS/WAN on an ipchains-secured firewall, the built-in scripts don't quite handle it... I have some alt. ones. Email me if you want them. > > CIPE - packaged, is a kernel patch > FreeS/WAN - not packaged, is a kernel patch, is IPSEC compliant; > google for the site > vpnd - userland, IP over PPP over IP (ick, but easy to setup); > google for the site -- Ooh, look! It's fluffy! ** Penguin Farmer Bryon Roche, Kain <[EMAIL PROTECTED]> pgpUdDDAYfFeq.pgp Description: PGP signature
Re: tcp connection
On Sat, Jun 17, 2000 at 12:43:45AM -0400, Chris Wagner wrote: > At 10:48 PM 6/16/00 -0500, Sanjeev Gupta wrote: > >Sockets? Butyou would definitely have seen this more than a couple of > >times. > > No, not sockets, sockets are way down on the stack. This is the protocol > that says what the octets mean and do. It's the common thread among all the > high level protocols and is directly below them in the stack. But I can't > think of the darn name. What I think you're thinking of is just IP. You probably haven't been seeing it, because there is no concept of connection in TCP/IP stacks until you hit TCP, but here's how your connection kinda works (at least on 2 *nix boxen): peer<-->socket filehandle<-->transport<-->socket filehandle<-->peer "transport" here can be one of many things, such as: socket fd<-->unix domain socket<-->socket fd or socket fd<-->TCP<-->IP<-->ip transport(LAN/PPP/X.25/SmokeSignals)<- ->IP<-->TCP<-->socket fd Now, if you actually mean "what octets mean and do", those are actually defined higher than TCP, and are laid out in the specs for those respective protocols. i.e.: Telnet Protocol: RFC 854/855 FTP:RFC 959 TFTP: RFC 1350 POP3: RFC 1939 HTTP/1.1: RFC 2068 Hope that helps. -- Love is like a friendship caught on fire. In the beginning a flame, very pretty, often hot and fierce, but still only light and flickering. As love grows older, our hearts mature and our love becomes as coals, deep-burning and unquenchable. -- Bruce Lee ** Penguin Sympathizer Bryon Roche, Kain <[EMAIL PROTECTED]> PGP signature
Re: VPN recomendations
On Wed, Sep 13, 2000 at 10:58:15PM -0700, Luca Filipozzi wrote: > On Thu, Sep 14, 2000 at 01:42:26AM -0400, Kim O wrote: > > was just wondering what the best way is to do VPN between linux servers in > > different places to establish a small private network over public > > infrastructure. packages,software or howtos appreciated. There is also pipsecd, IIRC.. userland, IPSEC compliant.. Not quite as versatile or populer as FreeS/WAN, but just about as good a choice. Note that if you are using FreeS/WAN on an ipchains-secured firewall, the built-in scripts don't quite handle it... I have some alt. ones. Email me if you want them. > > CIPE - packaged, is a kernel patch > FreeS/WAN - not packaged, is a kernel patch, is IPSEC compliant; > google for the site > vpnd - userland, IP over PPP over IP (ick, but easy to setup); > google for the site -- Ooh, look! It's fluffy! ** Penguin Farmer Bryon Roche, Kain <[EMAIL PROTECTED]> PGP signature
Re: Network Mapping and Discovery.
On Mon, Oct 02, 2000 at 12:57:15PM -0400, Kim O wrote: > does anyone out there know of a product for unix that is like WhatsUp GOLD apt-get install 'scotty.*' look for scotty+tkined. -- Absurdity, n.: A statement or belief manifestly inconsistent with one's own opinion. -- Ambrose Bierce, "The Devil's Dictionary" ** Penguin Sympathizer Bryon Roche, Kain <[EMAIL PROTECTED]> PGP signature
