On 08/26/2014 07:58 AM, Roland Dobbins wrote:
On Aug 26, 2014, at 8:37 PM, John York <[email protected]> wrote:
In this case, 17 is both the protocol and port number. Confusing coincidence :)
Not in this output which the OP sent to the list:
8:33:58.482193 IP (tos 0x0, ttl 56, id 0, offset 0, flags [DF], proto UDP (17),
length 29) x.x.x.x.2072 > x.x.x.x.27015: UDP, length 1
0x0000: 4500 001d 0000 4000 3811 088c cf9a 3b8c [email protected]
<mailto:[email protected]>.....;.
0x0010: 405e eebf 0818 6987 0009 10f8 4300 0000 @^....i.....C...
0x0020: 0000 0000 0000 0000 0000 0000 0000 ..............
18:33:58.482193 IP (tos 0x0, ttl 56, id 0, offset 0, flags [DF], proto UDP (17),
length 29) x.x.x.x.2072 > x.x.x.x.27015: UDP, length 1
0x0000: 4500 001d 0000 4000 3811 088c cf9a 3b8c [email protected]
<mailto:[email protected]>.....;.
0x0010: 405e eebf 0818 6987 0009 10f8 4300 0000 @^....i.....C...
0x0020: 0000 0000 0000 0000 0000 0000 0000 ..............
18:33:58.484625 IP (tos 0x0, ttl 56, id 0, offset 0, flags [DF], proto UDP (17),
length 29) x.x.x.x.2072 > x.x.x.x.27015: UDP, length 1
0x0000: 4500 001d 0000 4000 3811 088c cf9a 3b8c [email protected]
<mailto:[email protected]>.....;.
0x0010: 405e eebf 0818 6987 0009 10f8 4300 0000 @^....i.....C...
0x0020: 0000 0000 0000 0000 0000 0000 0000 ..............
18:33:58.486137 IP (tos 0x0, ttl 56, id 0, offset 0, flags [DF], proto UDP (17),
length 29) x.x.x.x.2072 > x.x.x.x.27015: UDP, length 1
0x0000: 4500 001d 0000 4000 3811 088c cf9a 3b8c [email protected]
<mailto:[email protected]>.....;.
0x0010: 405e eebf 0818 6987 0009 10f8 4300 0000 @^....i.....C...
0x0020: 0000 0000 0000 0000 0000 0000 0000 ..............
Source port 2072, destination port 27015.
Been awhile since I got to dig into hex tcpdump but spent the time
anyway. A UDP data segment that is 9 bytes long and only contains a "C"
(0x43) ? And looks like to a Steam/Half-life (27015) gaming port. Not
sure what the "C" is used for with those systems but guessing it's some
sort of request?
--john
----------------------------------------------------------------------
Roland Dobbins <[email protected]> // <http://www.arbornetworks.com>
Equo ne credite, Teucri.
-- Laocoön
