List Interfaces: sudo tcpdump -D
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TFTP : NOT Working: sudo tcpdump -i eth1 port tftp -vvv
Host traffic, source OR dest IP@: sudo tcpdump -i ens33 port not 22 and host 192.168.0.16
Exclude SSH session: sudo tcpdump -i eth2 port not 22 ( "and port not
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53" )
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sudo dhclient -r eth1 && sudo dhclient eth1
vagrant@MiniUbuntu:~$ sudo tcpdump -i eth1 port bootps -vvv
tcpdump: listening on eth1, link-type EN10MB (Ethernet), capture size 262144 bytes
17:49:36.186186 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328)
0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 08:00:27:e8:a0:54 (oui Unknown), length 300, xid 0xf b47c01a, Flags [none] (0x0000)
Client-Ethernet-Address 08:00:27:e8:a0:54 (oui Unknown)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Discover
Requested-IP Option 50, length 4: 11.0.1.102
Hostname Option 12, length 10: "MiniUbuntu"
Parameter-Request Option 55, length 13:
Subnet-Mask, BR, Time-Zone, Default-Gateway
Domain-Name, Domain-Name-Server, Option 119, Hostname
Netbios-Name-Server, Netbios-Scope, MTU, Classless-Static-Route
NTP
END Option 255, length 0
PAD Option 0, length 0, occurs 23
17:49:36.496645 IP (tos 0x0, ttl 64, id 24510, offset 0, flags [none], proto UDP (17), length 312)
11.0.1.221.bootps > 11.0.1.102.bootpc: [udp sum ok] BOOTP/DHCP, Reply, length 284, xid 0xfb47c01a, Flags [none] (0x0000)
Your-IP 11.0.1.102
Client-Ethernet-Address 08:00:27:e8:a0:54 (oui Unknown)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Offer
Lease-Time Option 51, length 4: 86400
Subnet-Mask Option 1, length 4: 255.255.255.0
Server-ID Option 54, length 4: 12.0.1.110
Default-Gateway Option 3, length 4: 11.0.1.221
Domain-Name Option 15, length 7: "jlknet1"
Domain-Name-Server Option 6, length 4: 11.0.1.221
END Option 255, length 0
PAD Option 0, length 0
17:49:36.497737 IP (tos 0x10, ttl 128, id 0, offset 0, flags [none], proto UDP (17), length 328)
0.0.0.0.bootpc > 255.255.255.255.bootps: [udp sum ok] BOOTP/DHCP, Request from 08:00:27:e8:a0:54 (oui Unknown), length 300, xid 0xf b47c01a, Flags [none] (0x0000)
Client-Ethernet-Address 08:00:27:e8:a0:54 (oui Unknown)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: Request
Server-ID Option 54, length 4: 12.0.1.110
Requested-IP Option 50, length 4: 11.0.1.102
Hostname Option 12, length 10: "MiniUbuntu"
Parameter-Request Option 55, length 13:
Subnet-Mask, BR, Time-Zone, Default-Gateway
Domain-Name, Domain-Name-Server, Option 119, Hostname
Netbios-Name-Server, Netbios-Scope, MTU, Classless-Static-Route
NTP
END Option 255, length 0
PAD Option 0, length 0, occurs 17
17:49:36.902284 IP (tos 0x0, ttl 64, id 24534, offset 0, flags [none], proto UDP (17), length 312)
11.0.1.221.bootps > 11.0.1.102.bootpc: [udp sum ok] BOOTP/DHCP, Reply, length 284, xid 0xfb47c01a, Flags [none] (0x0000)
Your-IP 11.0.1.102
Client-Ethernet-Address 08:00:27:e8:a0:54 (oui Unknown)
Vendor-rfc1048 Extensions
Magic Cookie 0x63825363
DHCP-Message Option 53, length 1: ACK
Lease-Time Option 51, length 4: 86400
Subnet-Mask Option 1, length 4: 255.255.255.0
Server-ID Option 54, length 4: 12.0.1.110
Default-Gateway Option 3, length 4: 11.0.1.221
Domain-Name Option 15, length 7: "jlknet1"
Domain-Name-Server Option 6, length 4: 11.0.1.221
END Option 255, length 0
PAD Option 0, length 0
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