Scapy can also be used to easily capture packets:

>>> a = sniff(filter="icmp and host 172.217.3.164", count=5)
>>> a.show()
0000 Ether / IP / TCP 192.168.225.146:ssh > 192.168.225.1:50862 PA / Raw
0001 Ether / IP / ICMP 192.168.225.146 > 172.217.3.164 echo-request 0 / Raw
0002 Ether / IP / ICMP 172.217.3.164 > 192.168.225.146 echo-reply 0 / Raw
0003 Ether / IP / ICMP 192.168.225.146 > 172.217.3.164 echo-request 0 / Raw
0004 Ether / IP / ICMP 172.217.3.164 > 192.168.225.146 echo-reply 0 / Raw
>>>

We can look at the packets in some more detail, including the raw format:

>>> for i in a:
...     print i.show()
...
<skip>
###[ Ethernet ]###
 dst= <>
 src= <>
 type= 0x800
###[ IP ]###
 version= 4L
 ihl= 5L
 tos= 0x0
 len= 84
 id= 15714
 flags= DF
 frag= 0L
 ttl= 64
 proto= icmp
 chksum= 0xaa8e
 src= 192.168.225.146
 dst= 172.217.3.164
 options
###[ ICMP ]###
 type= echo-request
 code= 0
 chksum= 0xe1cf
 id= 0xaa67
 seq= 0x1
###[ Raw ]###
 load= 'xd6xbfxb1Xx00x00x00x00x1axdcnx00x00x00x00x00x10x11x12x13x14x15x16x17x18x19x1ax1bx1cx1dx1ex1f !"#$%&'()*+,-./01234567'
None

Let's continue on and see how we can use Scapy for some of the common security testing.