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Windows Thread, Getting internet working on domain after changing IP range in Technical; Right he goes, Situation. Moved away from LEA provided 1024 IP range becasue we ran out New netwrok hardware infrastructure ...
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    Getting internet working on domain after changing IP range

    Right he goes,

    Situation.

    Moved away from LEA provided 1024 IP range becasue we ran out
    New netwrok hardware infrastructure upgrade put it,
    IP range change to 10.0.1.1 to 10.0.6.254
    All server given IP on new range.
    One server has two NICs in one on 10.0.* range and one on 172.18.* range
    Remote access and routing set up on same server to get internet working (this is temp)
    Waiting for new server to come in so i can set up ISA. ( should be with us in next 2 weeks)
    Internet works.

    Situation,
    We have a old Proxy server that used to do just little monitoring and was used to point to the LEA upstream
    We have set the Staff and Student GPO to point to 'server name* in the GPO connection settings via Port 8080 and it all worked for everyone.
    Now the internet works on our servers and our static IP workstatiosn but dees not work on domain pc's
    I have tried nslookup on the erver in question and it reolves so i know it is not DNS

    I guess i need to change the 'server name in the GPO setings?
    I have tried setting this manually on a workstation to:
    IP on the server on the 10.0.* range
    The same server but the differnet NIC on the 172.18.* range

    I cant get to work. I am also unsure as to what port it should be but i guess it should still be 8080.

    I need to get this up and running on a temp basis for the next two weeks for some admin and teaching staff who will be coming in.

    Can anyone advise please on what i should be doing?

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    Re: Getting internet working on domain after changing IP range

    When we first moved across to the LEA broadband, they gave us a range of 1024 IPs, and I said this was insufficient.

    I asked, and eventually, they changed us from this 4 * 24bit addresses to 16 * 24bit addresses. So now we have upto 4096 IPs.


    If you ask them, and badger them, and badger them, they might give you a larger range.

    But in the meantime.

    Check your DHCP setting:
    Is the default gateway set correctly ?

    I'm guessing that if the NSlookup works right, you can also ping the proxy server ?


    You don't need the windows routing, as the proxy server should do NAT.

    So check the routing on the proxy server, we have had similar situations with this, and I have had to remove the default gateway on this server, use "ROUTE" from a command prompt, "ROUTE PRINT" to see the current routing table.


    I still use MS Proxy 2, for the staff network, as it still works fine.

    Easier solution: Stick a sign up in reception/staff room saying:
    "Internet Down, use only possible from machines 1 to 4"

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    Re: Getting internet working on domain after changing IP range

    and the default Gateway should be................?

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    Re: Getting internet working on domain after changing IP range

    I dunno on your network, we have a central PIX/Router, to manage our VLANs and stuff... So this is our gateway.


    I ended up having no default gateway on proxy servers.

    As long as it knows where the local stuff is, and where the upstream proxy is, the servers will sort it out, as all requests go the right way.

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    Re: Getting internet working on domain after changing IP range

    The default gateway is set to the IP of the server that is doing the routing.

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    Re: Getting internet working on domain after changing IP range

    The default gateway should be just that, the gateway out of your network onto the big wide world so that is usually the Proxyserver or in some setups a router. Mine is set to the ISA Server on the network with us having ISA.

    I would suspect that with your usins RRAS that your shouldn't need a proxyserver address specified in Internet Explorer, or a port, it should just work so long as the gateway is set to that machines IP.

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    Re: Getting internet working on domain after changing IP range

    Wellit iis sett to the ip you mentioned and it does not work. :-(

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    Re: Getting internet working on domain after changing IP range

    The default gateway is used for addresses that the machines doesn't know about.

    Local traffic is exactly that local, anything within the subnet mask.
    The packets going to local traffic doesn't need routing.

    The packets to the internet will be tagged by Web Browsers (etc), and will be sent to the proxy server specified.


    If you have a "proxy" server that has in internal IP for local traffic, and an external IP for LA bound traffic, this will be doing NAT. So you don't need a gateway.

    I found that RRAS was amazingly crappy in Windows 2000, it only remembered some machines, I think it was a DHCP lease issue, but I never really sorted it on RRAS, I switched to linux, which worked, and then I changed over to just using a proxy. If you want a Linux server to do the same job it takes far less time to setup, but it is easier to do with specialised hardware (Cisco PIX / Nextscreen / Router).

    -==-

    If you want a temporary solution that will work.

    Remove the RRAS - the issue was probably due to DHCP leases;
    Check that the proxy server has an internal and external IP on separate cards;
    Set the proxy to be the name of the proxy server (make sure this is set in DNS correctly to the internal proxy IP);

    The only problem with this, will be dependent upon how the LA serve their intranet servers to you.

    --==--

    Contact your LA/ISP, and tell them how many:
    1. student workstations you have now;
    2. staff workstations (if on separate range);
    3. network infractructure (printers / routers / switches / WAPs);
    4. wireless clients;
    5. projected expansion, of all the above;

    And explain exactly why you need these extra IPs, and you'd rather change over now, than two years down the line.

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    Re: Getting internet working on domain after changing IP ran

    I find it interesting that people have 1024 addresses allocated to them and they still run out of them when they should be splitting the network into multiple vlans to reduce the broadcast traffic. All that many host on one flat subnet will be draggig the performance of the network down.

    My advice is to use the range that suits you better and vlan the network. I know there are schools who don't have instrafcture devices that don't support vlans but managers/ICT techs should be pushig the management to budget for switch and router upgrades.

    Personally i like the RBCs to be cut of from the router onwards i.e. they just provide a ISP like service and after the router i.e. your corp. networks it shoudl be up to the schools to decide on which subnet they want to use rather than the RBCs going straight to the workstation level (right through the crop. network) and being able to ping, remote control etc.).

    We have 11 Vlans setup at our place with different subnets to hold all servers, insfrastructure, workstations and in different blocks/sections, printers etc. The routing between these vlans is achived by using a Layer 3 switch (i don't recommend a router for this but a layer 3 swicth for HW routing).

    The performance has gone up and both teaching staff and student have noticed the loggin in time and accessing the network resources.

    Ash.

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    Re: Getting internet working on domain after changing IP range

    Yeah, but some of us have only just managed to convince people that having managed switches in each cabinet is a GOOD idea.
    "..but, it works.." was always the response...

    Now I just have to figure out to setup VLANs on HP switches... that don't interfere with the VLANs setup on the Cisco switches for the wireless networks.

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