Re: [PLUG] dsl questions

[Tobias DiPasquale <toby@cbcg.net>]

On Wed, 2003-01-29 at 14:41, epike@isinet.com wrote:
> hi list, couple of dsl questions:
> 
> 1.  Does it look like i'm getting 128kbps upload?
>     I should be.  How do i measure upload bandwidth?
> 
>    494486 bytes received in 29 seconds (17 Kbytes/s)
>    494486 bytes received in 29 seconds (17 Kbytes/s)
>    1285884 bytes received in 76 seconds (17 Kbytes/s)
>    436444 bytes received in 26 seconds (17 Kbytes/s)
>    436444 bytes received in 31 seconds (14 Kbytes/s)
>    262364 bytes received in 15 seconds (17 Kbytes/s)
> 
> 
>    I downloaded thru normal FTP from a friend's cable
>    connection.

It's tough to measure upload bandwidth. In general, however, you won't
be getting the stated maximum upload bandwidth at any given time.

> 2. my connection (ascii art):
> 
>    --dslmodem----switch
>                    |
>                    +---- server 1.2.3.4.
>                    |
>                    +---- server 1.2.3.5
>                    |
>                    +---- server 1.2.3.6
> 
>   
>    is it safe to telnet from server 1.2.3.4 to server
>    1.2.3.5?  In other words, can the packets
>    go out somehow of the dsl modem thereby allowing my
>    login to be be "sniffed"?  They are all on
>    the same subnet --- in this example,
>    1.2.3.0/255.255.255.0  but presumably
>    shared with other dsl subscribers (since I 
>    only have 5 IP's).  I dont think i'll be sniffed 
>    but i want to make sure.

If the machines are using 10. or 192. addresses, then there's no way
that packets could escape because those are not publicly-routable
addresses. If you telnet from one of your internal machines to another
one, you shouldn't worry, unless of course you have a hub and not a
switch. ;-)

-- 
Tobias DiPasquale
88FA 30C9 1E63 CFE2 CBD8  37C4 DA1C E2BF 1D26 F036
http://cbcg.net/

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