LAN servers restricted to LAN server (class c)

When I connect to a server added to my favorites it gives me this error
"lan servers restricted to lan server(class c)"...

Can some one help me out?

There are a coulple of IP Network Classes, which define the range of the first number in the address and the value used as the Netmask.

On our LAN connections, we need to use a Private, non-routing IP address of Class {A,B,C}. The Private, non-routing means that there are thousands of duplicates in the world but it doesn't matter as the Internet will never route to one of these directly - - that's the job of the router with NAT that has a lan with systems on these addresses.

The Class {A,B,C} can be seen/defined
in this Wiki article

Code:

Historical classful network architecture
Class	Leading bits   Range of first octet 	  Network portion   Host portion Number of networks  Number of addresses per network
A		0	     0 - 127		  a	  		b.c.d	    2^7 = 128		2^24 = 16777216
B		10	    128–191		  a.b	  		c.d	    2^14 = 16384	2^16 = 65536
C		110	    192–223		  a.b.c	  		d	    2^21 = 2097152	2^8 = 256

and that means {if the message is correct} that your lan IP addresses should look like 192.x.y.z

I am puzzled by your description and guess that your existing ip address is not 192.* - - get a command prompt and enter IPCONFIG
you should see something like

Code:

Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . : rr.com
        IP Address. . . . . . . . . . . . : 192.168.0.4
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.0.1

report your findings . . .

Well I have uploaded the description.

I hope it helps..

ok, that is the problem - - -

Code:

Ethernet adapter Local Area Connection:
        Connection-specific DNS Suffix  . : logondhcp.net.pk
        IP Address. . . . . . .[B]192.168.86.178[/B]<valid Class C 
        Subnet Mask . . . . .255.255.240.0  <unusual mask, but valid
        Default Gateway . .:                           <invalid

PPP adapter Broadband Connection:
        Connection-specific DNS Suffix  . :
        IP Address. . . . . . . 172.16.9.31        <valid Class B
        Subnet Mask . . . . . 255.255.255.255  <very narrow mask (ie only one address allowed)
        Default Gateway . . 172.16.9.31        <valid gateway but points to itself (ie not very useful)

I believe you are on a DSL connection (hense the PPP connection).
The PPP will not normally route to your Ethernet, due to different gateway addresses.

Get the command prompt again and enter ROUTE PRINT >myRoutes.txt

it should look something like

Code:

C:\Documents and Settings\Jeff>route print
===========================================================================
Interface List
0x1 ........................... MS TCP Loopback interface
0x2 ...00 0f b0 3d bc 1d ...... Realtek RTL8139 Family PCI Fast Ethernet NIC - Packet Scheduler Miniport
================================================================
==========================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0      192.168.0.1     192.168.0.4       20
        127.0.0.0        255.0.0.0        127.0.0.1       127.0.0.1       1
      192.168.0.0    255.255.255.0      192.168.0.4     192.168.0.4       20
      192.168.0.4  255.255.255.255        127.0.0.1       127.0.0.1       20
    192.168.0.255  255.255.255.255      192.168.0.4     192.168.0.4       20
        224.0.0.0        240.0.0.0      192.168.0.4     192.168.0.4       20
  255.255.255.255  255.255.255.255      192.168.0.4     192.168.0.4       1
Default Gateway:       192.168.0.1
===============================================================
Persistent Routes:
  None

Well i do not use DSL internet but moreover a broadband connection based on sharing.

By the way here are the details.

Hmm; btw- Broadband includes DLS, Cable and Satellite connections to an ISP.

I don't understand what you mean by 'based on sharing'.
Typically our networks are wired thusly:

Code:

ISP- - modem---router---multiple.systems

and the sharing is achieved via the router NAT support to your ISP connection.
A server would just be another ethernet connection to the router.

By broadband connection based on sharing, do you mean something like:

Code:

  router---some.systemA - - - server

I'm seeing really strange stuff in the routing table.

Column 1 are line numbers for discussion.

lines 1-5 are very normal and are the primary connection to the internet
(as verified by line 1 Network Dest = 0.0.0.0 and line 12 at the bottom.
These two say any inputs or outputs default to this connection.

All the other stuff is questionable.

Line 6: is suspicious: It is frequently associated with virus's and trojans:

NetRange: 1.0.0.0 - 1.255.255.255
CIDR: 1.0.0.0/8
NetName: APNIC-1
NetHandle: NET-1-0-0-0-1
OrgName: Asia Pacific Network Information Centre
OrgId: APNIC
City: Milton
StateProv: QLD
Country: AU

Lines 7-11 are the Class B address that is causing the diagnostic message.

SO. HOW ARE YOU CREATING THIS CONNECTION?
Is this a VPN connection?

I would bet you have Internet access as long as the 192.168.86.178 connection does not exist.
IMO, the Default Gatway is being changed whe you make this connection.

Well I am taking a connection from a ISP. He has placed a device at the top floor of our building. From there connection is distributed to different flats through wires.

But I think this problem is telling me of a problem in cs folder not in the internet connection.
Well this did not happen first but have generated in the past few days which further confirms the related thing causing it.

"Lan servers are restricted to local clients (class c)", this is the problem that has worried me, but don't know WHY?

huh? What's that?

come on! Routing table is a mess
and you don't have the gateway correct
and an entry that shouts VIRUS.

I guess all the above was of no interest or help - - too bad

It's your system.

I would be looking into the Virus/Malware Forum for tools to verify your system is clean.

I dont know how but now the error has disappeared and I can easily connect to the server.
YEAHH!!!!

By the way thanks for your help,

Regards,
Khawaja Mustafa

Wonderful - - thanks for the feedback

Very through explanation Jobeard, however I think it came off a bit technical as it was directly to the point and T. I appreciated it.