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  • Are VLANs necessary for my environment?

    - by kleefaj
    Greetings. I'm the new network manager for a school. I've inherited an environment made up of several Windows servers, about 100 Windows clients, ten printers, one Cisco router, six Cisco switches, and 1 HP switch. Also, we're using VoIP. There are four floors in our building. The hosts on each floor are assigned to a separate VLAN. An office on the first floor has its own VLAN. All the switches are on their own VLAN. The IP phones are on their own VLAN. And the servers are on their own VLAN. For the number of hosts on the network, are all these VLANs really buying me anything? I'm new to the VLAN concept but it seems overly complicated for this environment. Or it's genius and I just don't get it. Any thoughts? Thanks, Jeff

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  • port forwarding using 3 static ip addresses

    - by Danny
    I am new to configuring routers. We have purchased a RV016 Cisco business router that has multiwan capability. What we are attempting to do is take map services from 3 different servers and assign 3 different static IP addresses and then forward port 80 through the router. A short term solution to building a proxy server. Is this possible? Right now we have a consumer grade Cisco router and assign a static IP and it works, we attempted the same settings on the business router and cannot get to the internet. We set it DHCP and it works fine, however we want to to forward the static ports not use DHCP.

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  • L2TP Site to Site VPN issues

    - by Chris Lively
    I have a windows 2008 r2 server that needs to establish a VPN connection to a remote VPN server. We're using the L2TP protocol with a pre-shared key. I initially used the New Demand Dial interface wizard. Then I went into properties on the interface and set the type of VPn to L2TP/IPSec and put the key under the advanced settings. The error I received when attempting to connect is: An error occured during connection of the interface. A Demand Dial Router attempted to connect over a port that was reserved for Remote Access Clients only.

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  • Proxying/Tunneling IPSec traffic via netcat or SOCKS?

    - by MattC
    I have a client that is using a SonicWall router as their VPN concentrator. I downloaded the client software and set up the router as a peer. My issue is that my company uses a dual DMZ setup, meaning we have an interior firewall, then a bunch of DMZ servers, then an external firewall, then finally the telco router. In this setup, the interior firewall has no way to communicate with the exterior firewall since they are on two totally separate subnets. The communication occurs through the servers that straddle the networks. In this case, I need some way to forward the ISAKMP/IPSec traffic from my desktop out to the Internet. My usual trick of using netcat on the intermediate proxy server doesn't work here since it's not TCP/UDP traffic as far as I can tell. All of my previous experience with VPN's have been using SSL-based VPN's which are clearly very easily proxy-able. Any help would be appreciated, thanks!

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  • SonicWALL NetExtender - Client Install?

    - by JArmani
    We are about to push out a new VPN solution for our organization. One of the beautiful things we saw in SonicWALL's SSL-VPN was the thin, browser-based solution of NetExtender. Does anybody have experience with this? My specific concern is that, at least in Windows 7 during testing, it prompts for admin credentials to install the ActiveX NetExtender plugin, which is standard for installing anything in a Windows domain environment. But doesn't this mean I actually have to go in and install the client on all domain laptops that will be using the VPN in the field? They wouldn't actually be able to simply visit the site and run the client, as advertised? By the way, we're using the SonicWALL NSA 3500 device. We do have ManageEngine's Desktop Central, which can push out software installations, but it usually has to be in the form of a .MSI package. Is there any solution to this, besides hitting up all my organization's computers?

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  • Zentyal Server : Setting up secure VPN Client

    - by JustShrey
    I have officially exhausted pretty much all my google-fu trying to set this up so I'm asking my question here. For the record, I am a mid level rookie who has played around with servers in his spare time but have never worked with Zentyal Server. Now, I have been able to set up the server as a gateway, with one Network card being external and the other facing the internal Network. The Internal network computers are able to access the internet without any issues. What I need to do is to setup a open-vpn client on the central server so that all Internet data goes though the secure VPN session. As far as I can see, I can't set up the vpn session through the web admin page. Could somebody point me in the right direction? How would I go about doing this? Regards Shreyas

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  • How to retrieve connection details of CheckPoint SSL Network Extender?

    - by amoe
    My workplace uses a Java-based VPN tool named CheckPoint SSL Network Extender. I would like to configure the VPN connection myself using stock OS tools, because I find the applet to be rather unstable. How would I go about getting all of the connection details needed to manually connect to the VPN? My workplace only supports the official client. When I am connected with the Java applet, if I run ipconfig /all I can see that a hidden network connection is created named Check Point Virtual Network Adapter For SSL Network Extender - Packet Scheduler Miniport. I can see the various IP and DNS details there as well. However, because I need to log in to the applet-based tool, I presume I need to export some kind of key in order to use OS tools to configure this. Is this even possible? Answers for any OS are great although I am using Windows XP to test, and also want to use Linux clients.

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  • Windows XP clients do not update server 2008 DNS forward lookup zone.

    - by whatsisname
    I have a Cisco 5505 working as a DHCP server, and a server 2008 DNS server running an AD domain. I am having problems with all XP computers not updating the forward lookup zone. The reverse lookup zone updates are working. Windows vista and 7 computers update just fine. Additionally the DNS server accepts both secure and non-secure updates. When people are connected through the Cisco's VPN, they cannot resolve to any machines that have reverse lookup zones, but they can resolve entries in the forward lookup zone. I have tried ipconfig /registerdns, but the forward lookup zone entries for the XP clients are not being populated. How can I get the XP Dynamic DNS client to make the updates, or what can I do to debug what's going on? Thanks

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  • Colliding network addresses

    - by joepd
    A customer is using the same address space as the company network. I need to connect with Cisco VPN Client to the network of the customer, without affecting local connectivity. To keep all working, I connect from a VM to avoid network addressing collisions. This works, but I'm looking for a way to get rid of the VM. Is it possible to connect with Cisco VPN Client 4.8 from Windows 7, without changing the 'normal' routing? How to tell specific applications (most importantly: Putty, VNC, mstsc, psql) to resolve their routes to the VPN instead of the default network interface? Have been hearing about SOCKS-proxies, is that something that could be made to work? I fear that this is a a bit of a crude question, but I'd be happy to specify more details/context.

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  • All created VPNs result in Error 720

    - by campo
    I have a few different VPNs I need to connect to. I'm using windows 8 and standard ptpp VPN. Every VPN I have created though results in the same error: Error 720: A connection to the remote computer could not be established You might need to change the network settings for this connection The VPN works in Windows 7 and XP. I'm not sure if this has something to do with my new laptop or if its something with Windows 8 itself. Any help would be greatly appreciated and if there is any extra info I can provide please let me know. Edit: I've tried with virus scanner turned off and windows firewall turned off as well and I still receive the same error message.

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  • Linksys/Cisco Small Business SRW-Series (ie SRW248G4) - Overcoming the Limitations

    - by Warren P
    We just purchased a Cisco/Linksys SRW 248G4 switch to try it out. We have always had unmanaged switches before, and this is our first "somewhat managed" switch. So far the major limitations are: Only Internet Explorer 6 (manual says IE 5.5!) works for the web interface SSH exists but is not practically useable because the only key length that is supported is no longer even used by most modern SSH installs. (I get the error "RSA modulus too small" in openssh 4.x/5.x) This is with the latest firmware revision, I believe, although Cisco's website does not actually tell you what version you're downloading. All in all, I think, they must be trying to tell me that if I want a good-quality switch, I shouldn't buy these SRWs and should buy a Dell or an HP ProCurve, or save up my pennies, and buy a Catalyst. The question here, then, at long last: Has anyone gotten the web-browser to work via some IE 7 or IE 8 compatibility mode settings or used another browser (Opera? KDE/Safari/WebKit?) and spoofed IE6? Is there any way to get the SSH key length upgraded? I'm guessing a 0% chance of a yes on that last one. I found an XP machine, used telnet (via PuttyTel.exe) and IE6 to set this up, and I doubt we'll have to touch it again. Which is fine with us. But it would be nice if I could administer this thing from either (a) a linux box, or (b) my primary desktop which is windows 7. It looks like XPMode with IE6 on the virtual XP machine may be my only way to administer this type of switch via the web.

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  • DNS Resolution doesn't work after uninstalling Cisco VPN & Deterministic Network Enhancer in Win 7

    - by Craig M
    I just upgraded my home PC to Windows 7 Ultimate 32 bit. After trying various methods to get the Cisco VPN client to work, I gave up and decided to just run it in XP mode. The last steps I tried were in this article ( http://social.technet.microsoft.com/Forums/en-US/w7itproappcompat/thread/d880dfe5-7f44-4955-8620-2a9355d8ea8b/ ) After that, I uninstalled the Cisco client and rebooted. I uninstalled the Deterministic Network Enhancer and rebooted again. Both uninstalled successfully, but now I'm not able to resolve any DNS. The only way I can resolve DNS is to reinstall the DNE, reboot, and uninstall the DNE. Then I am able to resolve DNS lookups until I reboot again. Once it's rebooted, no more DNS. Any ideas? Edit: I completely forgot I'd asked this question until harrymc posted his answer. I've since found out that to fix this problem, I need to disable my Local Area Connection and re-enable it. Once I do that I have no trouble making network connections until the next time I reboot at which point I repeat the process. It's annoying, but manageable since I reboot very infrequently.

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  • Windows 7 remote desktop connection does not respond to mouse or keyboard

    - by Daniel Jette
    Pretty much every time I connect to my work PC from home (both running Windows 7), I can see the screen refresh and signs of life (clock changes, notifications pop up), but I cannot interact with the remote machine at all. Mouse and keyboard input are both ignored. If I repeatedly reconnect, I will eventually get a connection that works. I think either a setting on my host machine, VPN client or work network is configured wrong. My home PC is running Windows 7 Professional. My work PC is running Windows 7 Enterprise. My VPN client is Cisco AnyConnect. Is this a problem anyone else has run in to? Any suggestions for settings to tweak?

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  • Ipsec config problem // openswan

    - by user90696
    I try to configure Ipsec on server with openswan as client. But receive error - possible, it's auth error. What I wrote wrong in config ? Thank you for answers. #1: STATE_MAIN_I2: sent MI2, expecting MR2 003 "f-net" #1: received Vendor ID payload [Cisco-Unity] 003 "f-net" #1: received Vendor ID payload [Dead Peer Detection] 003 "f-net" #1: ignoring unknown Vendor ID payload [ca917959574c7d5aed4222a9df367018] 003 "f-net" #1: received Vendor ID payload [XAUTH] 108 "f-net" #1: STATE_MAIN_I3: sent MI3, expecting MR3 003 "f-net" #1: discarding duplicate packet; already STATE_MAIN_I3 010 "f-net" #1: STATE_MAIN_I3: retransmission; will wait 20s for response 003 "f-net" #1: discarding duplicate packet; already STATE_MAIN_I3 003 "f-net" #1: discarding duplicate packet; already STATE_MAIN_I3 003 "f-net" #1: discarding duplicate packet; already STATE_MAIN_I3 010 "f-net" #1: STATE_MAIN_I3: retransmission; will wait 40s for response 031 "f-net" #1: max number of retransmissions (2) reached STATE_MAIN_I3. Possible authentication failure: no acceptable response to our first encrypted message 000 "f-net" #1: starting keying attempt 2 of at most 3, but releasing whack other side - Cisco ASA. parameters for my connection on our Linux server : VPN Gateway 8.*.*.* (Cisco ) Phase 1 Exchange Type Main Mode Identification Type IP Address Local ID 4.*.*.* (our Linux server IP) Remote ID 8.*.*.* (VPN server IP) Authentication PSK Pre Shared Key Diffie-Hellman Key Group DH 5 (1536 bit) or DH 2 (1024 bit) Encryption Algorithm AES 256 HMAC Function SHA-1 Lifetime 86.400 seconds / no volume limit Phase 2 Security Protocol ESP Connection Mode Tunnel Encryption Algorithm AES 256 HMAC Function SHA-1 Lifetime 3600 seconds / 4.608.000 kilobytes DPD / IKE Keepalive 15 seconds PFS off Remote Network 192.168.100.0/24 Local Network 1 10.0.0.0/16 ............... Local Network 5 current openswan config : # config setup klipsdebug=all plutodebug="control parsing" protostack=netkey nat_traversal=no virtual_private=%v4:10.0.0.0/8,%v4:192.168.0.0/16,%v4:172.16.0.0/12 oe=off nhelpers=0 conn f-net type=tunnel keyexchange=ike authby=secret auth=esp esp=aes256-sha1 keyingtries=3 pfs=no aggrmode=no keylife=3600s ike=aes256-sha1-modp1024 # left=4.*.*.* leftsubnet=10.0.0.0/16 leftid=4.*.*.* leftnexthop=%defaultroute right=8.*.*.* rightsubnet=192.168.100.0/24 rightid=8.*.*.* rightnexthop=%defaultroute auto=add

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  • How to scope access to a service to set of users, using OpenLDAP, and only OUs

    - by JDS
    Okay, here goes. Solving this will solve several problems for me (as I can reapply this knowledge to several extant, similar problems), but luckily I have a very specific, concise problem to describe. Enough preamble. Our hosting partner is setting up VPN access for us and is connecting it to our LDAP server. They are using Cisco VPN, the docs on setting this up are here: http://www.cisco.com/en/US/products/ps6120/products_configuration_example09186a00808c3c45.shtml#maintask1 Specifically, note the screenshot in (5), under "ASDM" Now, I do NOT want to provide access to all of our users. I only want to provide access to our IT group. But I do not see a configuration option for LDAP groups on that web reference for the Cisco VPN. We are using: OpenLDAP 2.4 Static groups (i.e. "Group has the following members...") Single user OU, "ou=users,dc=mycompany,dc=com" Is it possible to provide an alias of some kind in OpenLDAP that creates another OU, "itusers", say, and lets me alias the members of that OU somehow? Something like: "cn=Jeff Silverman,ou=itusers,dc=mycompany,dc=com" is an alias for "cn=Jeff Silverman,ou=users,dc=mycompany,dc=com" And is NOT a separate, unique user account. Alternatively, should I just create a separate OU and manage it separately? It is a pain, but only 12-15 users will have to be managed that way, with two separate user accounts. But I hate this option - messy, unmanageable, unscalable. You know what I mean. I am open to any options. I've searched and read all over but I can't quite find an directly analagous example. I can't possibly be the only one who's had this problem! Thanks!

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  • RRAS with DHCP when the IP pool is on a different subnet

    - by John B
    I run a small business network and the last couple of days I have been setting up some equipment to add VPN capabilities to our network. I've got the following set up: Windows 2008 R2 with RRAS - 172.22.200.50 Cisco RV082 router - 172.22.100.1 / 172.22.200.1 The Cisco router only support DHCP on a single class C network; 172.22.100.0/24. On the Cisco router I have set up an additional subnet; 172.22.200.0/24. The DHCP range is 172.22.100.200-254 When a PPTP connection comes in to the router, it is forwarded to my RRAS at 172.22.200.50. If I configure RRAS to assign IPs from a static pool on the 172.22.200.0/24 subnet everything works fine except the DNS suffix / search domain. However, if I set RRAS to use DHCP I am no longer able to contact any devices on the network. The IP I receive is on a different subnet (172.22.100.0/24). Is it possible to still use DHCP as the method of ip assignment in RRAS, even when the IP adresses assigned are in a different subnet? If yes, what piece of configuration am I missing to fix the VPN connection issues mentioned in the paragraph above. The reason I want RRAS with DHCP to work is because from what I have understood, this is the "only" way to hand out a DNS suffix to VPN clients. Any help on this matter is greatly appreciated!

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  • What is "Disable class based route addition" good for?

    - by id.roppert.dejroppert
    In the advanced TCP/IP settings of a VPN connection, i found a checkbox labeled with "Disable class based route addition". The checkbox is only enabled as long as "Use default gateway on remote network" is switched off. What is "Disable class based route addition" good for? Detailed instructions to find the settings: Open Properties of VPN connection Go to Networking tab Open Properties of "Internet Protocol Version 4 (TCP/IPv4)" (and/or TCP/IPv6) Click "Advanced..." Button Change to "IP Settings" tab Here you can find the checkboxes mentioned above

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  • O2 Mobile broadband - VPN problems

    - by NT
    My O2 dongle seems to connect to my Work VPN only after 10.30pm??? I cant understand why it doesnt work during the day, same laptop, same connection settings, same location? Is it possible the provider limits VPN ports or service during the day?

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  • Change password via NetScreen remote

    - by Marcelo Cantos
    I'm using NetScreen remote to VPN from home. I recently changed my password at work, and now my home system keeps complaining, "Windows needs your current credentials to ensure network connectivity." I can't change the cached password for peanuts. I can't find an option in NetScreen remote to connect to the VPN before logging in, as suggested here.

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  • Change password via NetScreen remote

    - by Marcelo Cantos
    I'm using NetScreen remote to VPN from home. I recently changed my password at work, and now my home system keeps complaining, "Windows needs your current credentials to ensure network connectivity." I can't change the cached password for peanuts. I can't find an option in NetScreen remote to connect to the VPN before logging in, as suggested here. How do I change the cached password?

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  • Using (Squid) Caching Proxy with (HideMyAss) OpenVPN VPN

    - by wajed
    I've set up Squid proxy, and I confirmed it's working on my PC. Note: To be able to use the Internet with better speed, I have to forward to another parent proxy (my university's proxy). Now I'm using HideMyAss VPN (OpenVPN protocol), but without the squid, since I don't know how to configure them to work correctly. Note: I'm using the university's proxy in HideMyAss VPN software so that I get good Internet connection, but if I use squid's proxy, it doesn't work.

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  • Unable to establish remote access to workplace pc windows 7

    - by sam
    I am successfully connected to my workplace via vpn. But when I try to connect to my pc via remote desktop it keep asking for credentials even I am providing the right one. This works fine in windows xp but unable to connect using win 7. Also after establishing a vpn I lost my internet access. Any idea.

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  • custom route not working on windows

    - by Michael Closson
    My windows laptop is directly connected to 192.168.1.0/24 (wireless lan). I access 10.21.0.0/16 though a router that is connected to both networks. The routing works fine with this configuration. I have a VPN, that connects to 10.0.0.0/8. The VPN network doesn't actually use any IPs in the 10.21.0.0/16 range. So I should be able to configure my routing table to route all the 10.21.0.0/16 IPs through the wireless lan, and all other 10.0.0.0/8 through the VPN. My understanding is that I can do this if the metric for the 10.21.0.0 is lower than that of the 10.0.0.0. The VPN (10.0.0.0) is automatically assigned metric 20. I have manually assigned the WLAN a metric of 1. I manually add an entry to the routing table with this command: route add 10.21.0.0 mask 255.255.0.0 192.168.1.201 metric 1 The route is then assigned a metric of 2 (which is expected). The problem is that it doesn't work. I can't ping any machine on the 10.21.0.0 network. But I can access other stuff on the 10.0.0.0. I can also access stuff on the 192.168.1.0. To debug this i've done the following. Run tcpdump on the router (192.168.1.201). I can verify that no packets for 10.21.0.0 arrive on that interface. Disable iptables on the router. Disable the windows firewall. Run wireshark on my laptop, to try and see which interface the ping requests go to. But I can't see them go anywhere!! The ping command doesn't receive any 'destination unreachable' messages. Here is the relevant section of the routing table. IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 192.168.1.201 192.168.1.18 2 10.0.0.0 255.0.0.0 On-link 10.55.44.203 20 10.21.0.0 255.255.0.0 192.168.1.201 192.168.1.18 2

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