VirtualBox

Changes between Initial Version and Version 3 of Ticket #5028


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Timestamp:
09/18/09 06:32:05 (5 years ago)
Author:
frank
Comment:

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  • Ticket #5028 – Description

    initial v3  
    11A simple scenario. Machine 2 has a nic card using internal network (csci360). Machine 1 has two nic cards eth1 using internal network (csci360) and eth1 using NAT (ip ~10.0.2.X). I have IP_FORWARDING enabled on Machine 1. Back in version 2.X I was able to send traffic from machine 2 to machine 1 through internal to the NAT and out the host and then the traffic would return correctly. Now in version 3.0.6, the traffic stops at the host machine and never sees the VM. If I send a request from machine 1, the traffic goes out and back fine. When sent from machine 2 through machine 1, it goes out and stops at the machine 1. Below is a tcpdump from the host OS. Lines 2-6 shows a ping from machine 1 and 7-8 show a ping from machine 2. It stops at line 8. 
    22 
    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 
     5tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes 
     616:53:54.680706 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) 
     916:53:54.684916 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] 
     1216:53:54.689610 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 
     1416:53:54.777436 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 
     1616:55:06.830593 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) 
     1916:55:06.834671 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}}} 
    2123 
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