Networking: shared ko, bridged ok

Discussion in 'Installation and Configuration' started by Max_B, Sep 4, 2008.

  1. Max_B

    Max_B

    Messages:
    7
    Shared used to work OK.
    I did not made update on windows side, I suspect leopard side.
    I tried all relevant settings fond on threads here. In shared, no ping cross the NAT (10.211.55/24).

    Bridged is ok but less secure.

    One sidenote: I have two VM with same XP/SP2 one can work in shared if I add a DNS server IP in OSX network preference at parallels interface. Does not work on other VM.
     
  2. John@Parallels

    John@Parallels

    Messages:
    6,343
  3. Max_B

    Max_B

    Messages:
    7
    Mac Addresses are different (Parallels set this ok). However this setting is only relevant when running the two VM simultaneously, right?
    In my tests I run them one after the other. I'll have to check both simultaneously.
    What do you think of the fact that adding a DNS helps somehow/sometime?
    What could prevent the Parallels NAT traversing (i.e. ping to NAT subnet - 10.211.55.0 is ok, ping to host subnet - 10.37.129.0 is not) ?
     
  4. John@Parallels

    John@Parallels

    Messages:
    6,343
    Please put here ipconfig /all from both Windows VMs
     
  5. Max_B

    Max_B

    Messages:
    7
    Well, after more testing, I must say that I added confusion with my remark on DNS. It was not relevant. I though it worked to add it but it was because toggled network connectivity to bridged while VM running, using the Parallels Devices menu.

    So, here I am: both VM act the same, shared ko, bridged ok, host-only ok. Below are active settings looking an normal.
    In shared, no ping cross the NAT and no DNS reply from 10.211.55.1

    First VM
    Windows IP Configuration

    Host Name . . . . . . . . . . . . : ie6
    Primary Dns Suffix . . . . . . . :
    Node Type . . . . . . . . . . . . : Unknown
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No

    Ethernet adapter Local Area Connection 2:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Parallels Network Adapter
    Physical Address. . . . . . . . . : 00-1C-42-EA-C6-72
    Dhcp Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    IP Address. . . . . . . . . . . . : 10.211.55.4
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Default Gateway . . . . . . . . . : 10.211.55.1
    DHCP Server . . . . . . . . . . . : 10.211.55.1
    DNS Servers . . . . . . . . . . . : 10.211.55.1
    Lease Obtained. . . . . . . . . . : vendredi 5 septembre 2008 21:52:37
    Lease Expires . . . . . . . . . . : vendredi 12 septembre 2008 21:52:37

    Second VM:

    Windows IP Configuration

    Host Name . . . . . . . . . . . . : mbdd26
    Primary Dns Suffix . . . . . . . :
    Node Type . . . . . . . . . . . . : Unknown
    IP Routing Enabled. . . . . . . . : No
    WINS Proxy Enabled. . . . . . . . : No

    Ethernet adapter Local Area Connection:

    Connection-specific DNS Suffix . :
    Description . . . . . . . . . . . : Parallels Network Adapter
    Physical Address. . . . . . . . . : 00-1C-42-12-16-F0
    Dhcp Enabled. . . . . . . . . . . : Yes
    Autoconfiguration Enabled . . . . : Yes
    IP Address. . . . . . . . . . . . : 10.211.55.5
    Subnet Mask . . . . . . . . . . . : 255.255.255.0
    Default Gateway . . . . . . . . . : 10.211.55.1
    DHCP Server . . . . . . . . . . . : 10.211.55.1
    DNS Servers . . . . . . . . . . . : 10.211.55.1
    Lease Obtained. . . . . . . . . . : vendredi 5 septembre 2008 21:26:12
    Lease Expires . . . . . . . . . . : vendredi 12 septembre 2008 21:26:12

    relevant OS X ifconfig entries:

    en2: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
    inet6 fe80::21c:42ff:fe00:0%en2 prefixlen 64 scopeid 0x7
    inet 10.37.129.2 netmask 0xffffff00 broadcast 10.37.129.255
    ether 00:1c:42:00:00:00
    media: autoselect status: active
    supported media: autoselect
    en3: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
    inet6 fe80::21c:42ff:fe00:1%en3 prefixlen 64 scopeid 0x8
    inet 10.211.55.2 netmask 0xffffff00 broadcast 10.211.55.255
    ether 00:1c:42:00:00:01
    media: autoselect status: active
    supported media: autoselect
     
  6. John@Parallels

    John@Parallels

    Messages:
    6,343
    It looks to be correct, what about antivirus on Windows side?
     
  7. Max_B

    Max_B

    Messages:
    7
    I have Norton security scan on one VM only. It's just a scanner, not an active background filter. And it used to work ok in shared until recently.
    Q. How can I test the Parallels NAT ?
    Q. Why the 10.211.55.1 gateway/DNS does not reply to DNS query? Because forwarding fails? Then it's in the OS X layer, right?
     
  8. Max_B

    Max_B

    Messages:
    7
    solved

    OK, I found the culprit: psvnatd was blocked from internet by LittleSnitch. I had a rule to allow it to access DNS, but as my provider changed DNS IP this rule was too restrictive. I must have missed the LS request for accessing the new DNS IP. I widened the rule to any port 53.

    Posted here for future reference.

    I still don't understand why this prevented pinging host address on 10.37.129.2
     

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