Re: When I use DialUp and LAN at same time, I cannot access LAN.

From: Klw (Klw_at_discussions.microsoft.com)
Date: 01/28/05 

Date: Fri, 28 Jan 2005 09:23:03 -0800

This indeed solved the issue. Thank you again for the wonderful advice.

"Steve Winograd [MVP]" wrote:

> In article <1106901926.993116.133260@z14g2000cwz.googlegroups.com>,
> davinderkumar@gmail.com wrote:
> >Hello,
> >
> >I am on my company LAN network (DHCP). When I connect my machine to ISP
> >then I cannot access any machine, any local company website.
> >
> >Configurations are as followins:
> >
> >C:\>ipconfig/all
> >
> >Ethernet adapter Local Area Connection:
> >IP Address. . . . . . . . . . . . : 10.91.194.159
> >Subnet Mask . . . . . . . . . . . : 255.255.255.0
> >Default Gateway . . . . . . . . . : 10.91.194.1
> >DHCP Server . . . . . . . . . . . : 10.91.0.33
> >DNS Servers . . . . . . . . . . . : 10.91.0.33
> >10.91.0.44
> >10.91.0.11
> >Primary WINS Server . . . . . . . : 10.91.0.16
> >Secondary WINS Server . . . . . . : 10.91.202.10
> >
> >PPP adapter MYISP:
> >
> >Connection-specific DNS Suffix . :
> >Description . . . . . . . . . . . : WAN (PPP/SLIP) Interface
> >Physical Address. . . . . . . . . : 00-53-45-00-00-00
> >Dhcp Enabled. . . . . . . . . . . : No
> >IP Address. . . . . . . . . . . . : 10.148.8.82
> >Subnet Mask . . . . . . . . . . . : 255.255.255.255
> >Default Gateway . . . . . . . . . : 10.148.8.82
> >DNS Servers . . . . . . . . . . . : 202.56.230.5
> >202.56.230.6
> >
> >In DIALIP -> TCPIP Properties -> General Tab : Use dafault gateway on
> >network is CHECKED. If I uncheck this then I cannot access internet.
> >
> >C:\>route print
> >=================================================
> >Active Routes:
> >Network Destination Netmask Gateway Interface
> >Metric
> >0.0.0.0 0.0.0.0 10.91.194.1 10.91.194.159 21
> >0.0.0.0 0.0.0.0 10.148.8.82 10.148.8.82 1
> >10.6.6.6 255.255.255.255 10.148.8.82 10.148.8.82 1
> >10.91.194.0 255.255.255.0 10.91.194.159 10.91.194.159 20
> >10.91.194.159 255.255.255.255 127.0.0.1 127.0.0.1 20
> >10.91.255.255 255.255.255.255 10.91.194.1 10.91.194.159 1
> >10.148.8.82 255.255.255.255 127.0.0.1 127.0.0.1 50
> >10.255.255.255 255.255.255.255 10.91.194.159 10.91.194.159 20
> >10.255.255.255 255.255.255.255 10.148.8.82 10.148.8.82 50
> >127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
> >224.0.0.0 240.0.0.0 10.91.194.159 10.91.194.159 20
> >224.0.0.0 240.0.0.0 10.148.8.82 10.148.8.82 1
> >255.255.255.255 255.255.255.255 10.91.194.159 10.91.194.159 1
> >255.255.255.255 255.255.255.255 10.148.8.82 10.148.8.82 1
> >Default Gateway: 10.148.8.82
> >==================================================
> >
> >In this scenario, PING doesnt work as DNS servers are inaccessible.
> >Please let me know any possible solution.
> >
> >Thanks,
> >Davinder
>
> Your computer's LAN IP address is in the 10.91.194.x subnet. The
> LAN's DNS servers are in a different subnet: 10.91.0.x. Therefore,
> the only way to communicate with them is through the default gateway.
> However, when you dial into the ISP, the dial-up default gateway
> overrides the LAN default gateway, preventing access to the LAN's DNS
> servers.
>
> Changing your computer's LAN subnet mask from 255.255.255.0 to
> 255.255.0.0 might fix everything, since all 10.91.x.x addresses
> (including the DNS and WINS servers) would be in the same subnet as
> your computer.
>
> I strongly recommend consulting with your company's network
> administrators before making any change yourself, for these reasons:
>
> 1. They're the ones who know how the network works and how it should
> be configured.
>
> 2. They can tell you whether company policy allows making a dial-up
> connection while connected to the LAN. That can be a security risk,
> and some companies don't allow it.
> --
> Best Wishes,
> Steve Winograd, MS-MVP (Windows Networking)
>
> Please post any reply as a follow-up message in the news group
> for everyone to see. I'm sorry, but I don't answer questions
> addressed directly to me in E-mail or news groups.
>
> Microsoft Most Valuable Professional Program
> http://mvp.support.microsoft.com
>

Relevant Pages

  • Re: TCPIP - Ping tool
    ... Strangely enough the answer was under your nose all along, namely PING. ... If your "internal network" corresponds to a Local Area Network (LAN), ... assume the subnet address for your LAN is 192.168.10.0 and the subnet mask ...
    (bit.listserv.ibm-main)
  • Re: LAN IP addresses
    ... some operating systems that the lowest and highest _subnet_ were ... "outside", you probably have no idea what mask may be used on the LAN, ... and I believe it should not matter to any network equipement either. ...
    (comp.os.linux.networking)
  • Re: Detecting host in the local network
    ... LAN. ... To send a frame to host at the other IP network you must send to ... router, if they're willing to respond to the ping and the router allows ARP ... address you specify for any sort of IP traffic is not on your local subnet ...
    (microsoft.public.windowsce.embedded)
  • Re: Is it possible to use wireless AND still access my LAN?
    ... The LAN and the wireless networks use different subnets. ... I assume so if multiple computers are allowed as a network. ... Assign them static IP addresses in a different subnet than your ...
    (microsoft.public.windowsxp.network_web)
  • Re: When I use DialUp and LAN at same time, I cannot access LAN.
    ... >I am on my company LAN network. ... Your computer's LAN IP address is in the 10.91.194.x subnet. ... LAN's DNS servers are in a different subnet: ...
    (microsoft.public.windowsxp.network_web)