Actually, that won't work (I tried it, just for the helluvit). The A in ADSL is "Asymmetric", which means the downstream and upstream rates are different, and there are no rates that "match".
To do what you're talking about would require SDSL or another flavor of DSL that included matching upstream and downstream rates.
The people that think that a 675 can be made to do DMT are probably confusing it with the 678, which supports CAP and DMT.
L2TP (Layer 2 tunneling protocol) typically used with IPSec the same way PPP (Point-to-Point Protocol) is used with PPTP (L2TP/IPSec is the default VPN config for Win2K). L2TP encapsulates IP, IPX or whatever, and is encapsulated inside IPSec. From the RFC Draft: "The Layer Two Tunneling Protocol (L2TP)... permits the tunneling of the link layer (i.e., HDLC, async HDLC) of PPP." In essence it's a pared down PPP specifically for use in tunneling multiple protocols over IP.
You can actually masquerade IPSec connections under the right circumstances, although I'd recommend patching your Linux firewall with the FreeS/WAN stuff and doing it from there unless you absolutely HAVE to.
From John Hardin's website:
"The IPsec AH protocol (51/ip) incorporates a cryptographic checksum including the IP addresses in the IP header. Since masquerading changes those IP addresses and since the cryptographic checksum cannot be recalculated by the masquerading firewall, the masqueraded packets will fail the checksum test and will be discarded by the remote IPsec gateway. Therefore, IPsec implementations that use the AH protocol cannot be successfully masqueraded. Sorry. (ESP with authentication can be masqueraded.)"
A qoute: On November 20, 1998, the Commission amended the rule so that it will also apply to rental property where the renter has exclusive use, such as a balcony or patio. The effective date of the amended rule is January 22, 1999
If I run Start/Programs/Communication/ActiveSync, select Serial @ 115k and my desktop's name, then run pppd/dev/ttyS0 115200 192.168.55.1:192.168.55.2 asyncmap 0 lock crtscts modem connect "chat -v CLIENT CLIENTSERVER" on my linux box, I get a message indicating that the P/PC has connected to my desktop and is searching for the "connection agent" and then another message indicating (surprise) that it was unsuccessful.
I checked the debug logs from pppd, and the only protocol the P/PC asks for is TCP/IP, so ActiveSync must be based on that. I ran a simple TCP portscanner against the P/PC and found something on port 990, but I can't tell what it is - probably some proprietary ActiveSync server.
It would be nice if someone could reverse-engineer the ActiveSync protocol, but I'm not holding my breath. In the mean time, I use an ftp server for WinCE I got from this website. The MIPS executable is here and the SH3 executable is here.
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Actually, that won't work (I tried it, just for the helluvit). The A in ADSL is "Asymmetric", which means the downstream and upstream rates are different, and there are no rates that "match".
To do what you're talking about would require SDSL or another flavor of DSL that included matching upstream and downstream rates.
The people that think that a 675 can be made to do DMT are probably confusing it with the 678, which supports CAP and DMT.
L2TP (Layer 2 tunneling protocol) typically used with IPSec the same way PPP (Point-to-Point Protocol) is used with PPTP (L2TP/IPSec is the default VPN config for Win2K). L2TP encapsulates IP, IPX or whatever, and is encapsulated inside IPSec. From the RFC Draft: "The Layer Two Tunneling Protocol (L2TP) ... permits the tunneling of the link layer (i.e., HDLC, async HDLC) of PPP." In essence it's a pared down PPP specifically for use in tunneling multiple protocols over IP.
You can actually masquerade IPSec connections under the right circumstances, although I'd recommend patching your Linux firewall with the FreeS/WAN stuff and doing it from there unless you absolutely HAVE to.
From John Hardin's website:
"The IPsec AH protocol (51/ip) incorporates a cryptographic checksum including the IP addresses in the IP header. Since masquerading changes those IP addresses and since the cryptographic checksum cannot be recalculated by the masquerading firewall, the masqueraded packets will fail the checksum test and will be discarded by the remote IPsec gateway. Therefore, IPsec implementations that use the AH protocol cannot be successfully masqueraded. Sorry. (ESP with authentication can be masqueraded.)"
Some links you might find helpful:
Linux L2TP Daemon (rather old)
The Draft RFC mentioned above (from the same site)
John Hardin's VPN Masquerading Website
FreeS/WAN home page (IPSec for Linux)
Why not email Secretary Daley, Deputy Secretary Mallett or the Office of Public Affairs and make your opinion known in a polite and respectful manner. I did!
Here're the FCC's Cable Services Bureau Fact Sheets page and the Placement of DBS, MMDS, and Television Broadcast Antennas fact sheet.
A qoute: On November 20, 1998, the Commission amended the rule so that it will also apply to rental property where the renter has exclusive use, such as a balcony or patio. The effective date of the amended rule is January 22, 1999
Hope this helps!
On my PalmPC 2.0 device:
/dev/ttyS0 115200 192.168.55.1:192.168.55.2 asyncmap 0 lock crtscts modem connect "chat -v CLIENT CLIENTSERVER" on my linux box, I get a message indicating that the P/PC has connected to my desktop and is searching for the "connection agent" and then another message indicating (surprise) that it was unsuccessful.
If I run Start/Programs/Communication/ActiveSync , select Serial @ 115k and my desktop's name, then run pppd
I checked the debug logs from pppd, and the only protocol the P/PC asks for is TCP/IP, so ActiveSync must be based on that. I ran a simple TCP portscanner against the P/PC and found something on port 990, but I can't tell what it is - probably some proprietary ActiveSync server.
It would be nice if someone could reverse-engineer the ActiveSync protocol, but I'm not holding my breath. In the mean time, I use an ftp server for WinCE I got from this website. The MIPS executable is here and the SH3 executable is here.
Hope this helps someone...