Want to protect your cyber security and still get fast solutions? Ask a secure question today.Go Premium

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 7207
  • Last Modified:

Wierd packets on Sonicwall

I see some wierd ethernet packets on my packet monitor in the sonicwall..

Ethernet Header
 Ether Type: 0x32(0x32), Src=[00:1e:f6:c2:1b:15], Dst=[01:00:0c:cc:cc:cd]
Ethernet Type: Unknown
Value:[0]
DROPPED, Drop Code: 1, Module Id: 17, (Ref.Id: _2101_kprwvJqqm) 1:1)

Anybody an idea where this could be comming from?
0
socom1985
Asked:
socom1985
1 Solution
 
Greg HejlPrincipal ConsultantCommented:
find out what devices belong to the MAC addresses

also search Sonicwall site for drop code table for your firmware version - (do not use tables from other firmware versions)

Ether Type 0x32 appears to be IPSec ESP packet - SW should recognize ESP unless it is a malformed packet...

http://en.wikipedia.org/wiki/List_of_IP_protocol_numbers 
0
 
rfc1180Commented:
IP Protocols are not at layer 2, but layer 3, so the EtherType will never be 0x32

Well, what you are seeing is layer 2 traffic and you should NOT see 0x32 in the EtherType, typical values will be ARP and IP (0x0806, 0x0800)

Ether Type: 0x32(0x32), Src=[00:1e:f6:c2:1b:15], Dst=[01:00:0c:cc:cc:cd]
Ethernet Type: Unknown
Value:[0]

The reason you are seeing 'Unknown' is that there is no EtherType of 0x32:
http://www.cavebear.com/archive/cavebear/Ethernet/type.html

The fact that the destination MAC is 01:00:0c:cc:cc:cd and that the EtherType is 0x32 is a host is crafting packets with this information or you are running into some time of bug on the firewall or something else in the path between the host and firewall; additionally, as already stated, the malformed packet is from a hardware issue from a device in path.

If the MAC is not being spoofed, you will need to log into your switches and locate which switchport the mac is located on:
00:1e:f6:c2:1b:15

Billy
0
 
QlemoC++ DeveloperCommented:
This question has been classified as abandoned and is being closed as part of the Cleanup Program. See my comment at the end of the question for more details.
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now