3 | | |
4 | | 1. |
5 | | [root@jb356-7 ~]# tcpdump -vv|grep google.com |
6 | | 2. |
7 | | tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes |
8 | | 3. |
9 | | 16:53:54.680706 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto UDP (17), length 56) jb356-7.csci.csusb.edu.46510 > echo.csci.csusb.edu.domain: [bad udp cksum 6258!] 21002+ A? google.com. (28) |
10 | | 4. |
11 | | 16:53:54.684916 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 240) echo.csci.csusb.edu.domain > jb356-7.csci.csusb.edu.46510: 21002 q: A? google.com. 3/4/4 google.com. A gw-in-f100.google.com, google.com.[|domain] |
12 | | 5. |
13 | | 16:53:54.689610 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto ICMP (1), length 84) jb356-7.csci.csusb.edu > gw-in-f100.google.com: ICMP echo request, id 17416, seq 1, length 64 |
14 | | 6. |
15 | | 16:53:54.777436 IP (tos 0x0, ttl 46, id 62822, offset 0, flags [none], proto ICMP (1), length 84) gw-in-f100.google.com > jb356-7.csci.csusb.edu: ICMP echo reply, id 17416, seq 1, length 64 |
16 | | 7. |
17 | | 16:55:06.830593 IP (tos 0x0, ttl 62, id 0, offset 0, flags [DF], proto UDP (17), length 56) jb356-7.csci.csusb.edu.56157 > echo.csci.csusb.edu.domain: [bad udp cksum 26cb!] 47510+ A? google.com. (28) |
18 | | 8. |
19 | | 16:55:06.834671 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 240) echo.csci.csusb.edu.domain > jb356-7.csci.csusb.edu.56157: 47510 q: A? google.com. 3/4/4 google.com. A pz-in-f100.google.com, google.com.[|domain] |
20 | | |
| 3 | {{{ |
| 4 | [root@jb356-7 ~]# tcpdump -vv|grep google.com |
| 5 | tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes |
| 6 | 16:53:54.680706 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto UDP (17), length 56) |
| 7 | jb356-7.csci.csusb.edu.46510 > echo.csci.csusb.edu.domain: [bad udp cksum 6258!] 21002+ |
| 8 | A? google.com. (28) |
| 9 | 16:53:54.684916 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 240) |
| 10 | echo.csci.csusb.edu.domain > jb356-7.csci.csusb.edu.46510: 21002 q: A? google.com. 3/4/4 google.com. |
| 11 | A gw-in-f100.google.com, google.com.[|domain] |
| 12 | 16:53:54.689610 IP (tos 0x0, ttl 63, id 0, offset 0, flags [DF], proto ICMP (1), length 84) |
| 13 | jb356-7.csci.csusb.edu > gw-in-f100.google.com: ICMP echo request, id 17416, seq 1, length 64 |
| 14 | 16:53:54.777436 IP (tos 0x0, ttl 46, id 62822, offset 0, flags [none], proto ICMP (1), length 84) |
| 15 | gw-in-f100.google.com > jb356-7.csci.csusb.edu: ICMP echo reply, id 17416, seq 1, length 64 |
| 16 | 16:55:06.830593 IP (tos 0x0, ttl 62, id 0, offset 0, flags [DF], proto UDP (17), length 56) |
| 17 | jb356-7.csci.csusb.edu.56157 > echo.csci.csusb.edu.domain: [bad udp cksum 26cb!] 47510+ |
| 18 | A? google.com. (28) |
| 19 | 16:55:06.834671 IP (tos 0x0, ttl 64, id 0, offset 0, flags [DF], proto UDP (17), length 240) |
| 20 | echo.csci.csusb.edu.domain > jb356-7.csci.csusb.edu.56157: 47510 q: A? google.com. 3/4/4 google.com. |
| 21 | A pz-in-f100.google.com, google.com.[|domain] |
| 22 | }}} |