Re: does "port 25" work?

[Guy Harris <guy () alum mit edu>]

On Jul 31, 2008, at 11:11 AM, U. George wrote:

> [root@laptopserver MyRblsmtpd]# /usr/sbin/tcpdump  -n -v -i eth1   
> pppoes and port domain
> tcpdump: syntax error
>
> PPPoE is not in my tcpdump man page :{

To quote my original mail:

> If the DNS requests are on PPPoE, then, *at least with a  
> sufficiently recent version of libpcap*,

I've emphasized the critical part of my original mail.  Apparently,  
the libpcap and tcpdump on your system aren't sufficiently recent;  
you'll either have to update the OS on your system to a version that  
includes a sufficiently-recent libpcap and tcpdump (I don't know what  
version that'd be - I'm having some trouble accessing tcpdump.org's  
CVS server, so I don't know when I added the "pppoed" and "pppoes"  
options, but I think they're in libpcap 0.9.8 which goes with tcpdump  
3.9.8) or you'll have to get libpcap 0.9.8 and tcpdump 3.9.8 from www.tcpdump.org 
 (although they're not currently available - I suspect Michael  
Richardson is in the middle of putting the tcpdump.org machine back  
together). 
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