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FTP Server not responding

asked 2019-10-15 03:08:05 +0000

quewee gravatar image

updated 2019-10-15 03:09:57 +0000

Hi all,

Just doing some practice for an online course I am about to start and have been perplexed by a question regarding an FTP server not responding to requests. The following wireshark snip shows ping requests coming in which are then fragmented for some reason.

image descriptionNot sure if this embed will work here is a link to the screencap https://ibb.co/DrDHfSD

So far I've come up with: - MTU too small on server - ID of ping does not match ID of fragment - Fragments are not coming in the right order! - Source mac address is a group address

I can't think of the definite reason as to what may be the cause of this. Was just seeking some advice or help as to what i should be looking at?

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answered 2019-10-15 04:31:27 +0000

bubbasnmp gravatar image
  1. This looks to be a duplicate of https://ask.wireshark.org/question/12... which includes a link to the pcap.
  2. The wikipedia entry is pretty good describing the attack types: https://en.wikipedia.org/wiki/IP_frag...
  3. "ID of ping does not match ID of fragment": you're confusing the IP header Identification with the ICMP request Identifier.
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Asked: 2019-10-15 03:08:05 +0000

Seen: 38 times

Last updated: Oct 15