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• CVE-2011-4539 Denial of Service vulnerability in ISC DHCP

  - by chandan

  CVE DescriptionCVSSv2 Base ScoreComponentProduct and Resolution CVE-2011-4539 Denial of Service vulnerability 5.0 ISC DHCP Solaris 11 11/11 SRU 04 This notification describes vulnerabilities fixed in third-party components that are included in Sun's product distribution.Information about vulnerabilities affecting Oracle Sun products can be found on Oracle Critical Patch Updates and Security Alerts page.

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• CVE-2012-3955 Denial of Service (DoS) vulnerability in ISC DHCP

  - by RitwikGhoshal

  CVE DescriptionCVSSv2 Base ScoreComponentProduct and Resolution CVE-2012-3955 Denial of Service (DoS) vulnerability 7.1 ISC DHCP Solaris 11 11/11 SRU 13.4 This notification describes vulnerabilities fixed in third-party components that are included in Oracle's product distributions.Information about vulnerabilities affecting Oracle products can be found on Oracle Critical Patch Updates and Security Alerts page.

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• What's the best way to share folder between guest and host machine in VMWARE over VPN?

  - by melaos

  i have a win 7 host machine and i'm running my vmware which is a win server machine. So i'm doing windows development work on my vmware. the source codes are in my win 7 machine which i access using a shared folder method. My only problem now is when my vmware connects to VPN to the deploy the codes, the folder gets disconnected. as i don't really understand the networking or the vmware architecture, what can i do so that i can share the folder from my win 7 host machine to my vmware without getting disconnected when i connect to VPN using my guest (win server) machine? please advise. stuck on vmware thanks

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• PXE boot not happening due to DHCP issue .

  - by Nishant

  I could PXE boot this laptop to some extent yesterday but all of a sudden after some time it started to show this error message . I reinstalled my tftp server etc in between . It seems that DHCP lease issue is happening . The client wants some specific address I think ? How to resolve List item Client requested address 0.68.101.98 [06/06 04:37:27.658] no more address or address previously allocated by another server [06/06 04:37:27.658] Rcvd DHCP Discover Msg for IP 0.0.0.0, Mac 00:0E:7B:23:FA:11 [06/06 04:37:29.670] Client requested address 0.68.101.98 [06/06 04:37:29.670] no more address or address previously allocated by another server [06/06 04:37:29.670] Rcvd DHCP Discover Msg for IP 0.0.0.0, Mac 00:0E:7B:23:FA:11 [06/06 04:37:33.679] Client requested address 0.68.101.98 [06/06 04:37:33.679] no more address or address previously allocated by another server [06/06 04:37:33.679] Rcvd DHCP Discover Msg for IP 0.0.0.0, Mac 00:0E:7B:23:FA:11 [06/06 04:37:41.699]

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• IKE2 VPN Server Certificate expired. How do I issue a new one

  - by Preet Sangha

  This is a completely new area for me. We are getting "13801: IKE Auth Credentials are unacceptable" messages when connecting to our VPN service on a small Windows 2008R2 domain. Doing a google search has lead me to investigate the Certificate Authority. I've looked in the Certificate Authority | Issued Certificates And the one for the VPN Reconnect is marked as expired since a couple of hours a ago. Can some one tell me what the step I need to take to regen/reissue a simillar cert please? FYI:The client certs are not expiring for a number of years so they are fine.

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• VPN - What is the complexity involved setting one up across less than a dozen machines?

  - by lucius

  Hello, I have never set up and configured a VPN. I was wondering what it takes to set one up across windows server 2008 servers. What is the complexity involved? How complicated is it to configure? Do I need to set up a Domain controller as a pre-requisite? I am asking because it appears SQL Server 2008 merge replication can only be set up over the internet using VPN and I am trying to gauge what I am up against. Thanks a lot.

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• Can a company use VPN to spy on me?

  - by orokusaki

  I'm about to work with a company on a development project, but they first need to set up a pretty complicated environment, and suggested they use VPN to work on my machine to do this. Should I be concerned that somebody can just watch me work? It would be embarrassing, if somebody could witness my work habits (e.g. Asking questions on SO and researching all day is part of my daily work regiment, and makes me feel like a noob, but it keeps me sharp. I also listen to conspiracy videos all day, and RadioLab podcasts, :). Is VPN going to introduce this possibility, and if so, is there a way around it? EDIT: Also, is there a way I can always tell when somebody is VPNed into my computer?

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• AnyConnect SSL VPN split tunneling for a single website?

  - by Daniel Lucas

  We have a Cisco ASA 5510. We use split tunneling for AnyConnect SSL VPN clients. All internal addresses are tunnelled. Everything else is routed through the client's own internet connection. We use a SaaS service that only responds to requests when they come from one of our own public IP addresses. Because of this, VPN users are unable to access it currently. Is there a way to specify that a specific website should be tunneled and all others should not? NOTE: Worst case we will use a web bookmark on the clientless portal to tranlate through our network, but I'd like to see if the above is possible first.

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• Possible to get OpenDNS to dereference Host on VPN?

  - by Scott P

  I recently changed ISPs for my home internet. I am now having some trouble getting back into the corporate network from home over the VPN. I have figured out the OpenDNS is resolving the Hosts on the VPN incorrectly when I am using TCP/IP. When I browse to one of the hosts on corporate network, i.e. \host1, from the file manager this succeeds. However, when I ping the host, i.e. ping host1, the IP address is resolving to the OpenDNS name server instead of the actual Host IP address. Does anyone know how to make this work? On a hunch, I turned off type correction. But, this did not help.

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• What are the reasons for putting a VPN into a network?

  - by Craig Johnston

  What are the reasons for putting setting up a VPN? Does it require a domain name?

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• Connect macbook to my LAN through a VPN - best solution?

  - by LewisMc

  So I have a LAN connected via a ADSL/PPPoA, this is using a bog-standard DLink router supplied by my ISP (talktalk UK). I have a NAS within the LAN that is running FreeNAS and I want to be able to connect to it when I'm out and about. It's running an atom so it's quite low on juice consumption but I don't want to have it on all day and night so I've been waking it via a magic packet and booting it down from the web admin when I need it. So I want to connect to the LAN, I presume via a VPN, to be able to send a magic packet. But what is the best method to accomplish this, or is there an easier way? I've been looking at the cisco 857 integrated router and the Netgear prosafe 318(behind modem) but not sure If I'm on the right track with what I want to achieve as I've not much experience or knowledge with VPN's or networking (software engineering student). I have tried port forwarding but to no avail, either with magic packets or even connecting outside the LAN via DYNDNS. Thanks,

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• Can I make a computer connecting via VPN visible to computers within the network it is connecting to

  - by SCdF

  OK, here's the deal: I have a computer (specifically, a MacBook Pro) that is connected to a standard network that is then connected to the big nasty internet. Let's call it foo. It runs a web server on 8084, and so if you were on its local network you could get to this with http://foo:8084/, or http://192.168.1.2:8084/, or whatever. From foo I can VPN into my companies intranet and see a computer on the local company network called bar (another MacBook Pro, incidentally). Is there any way to set this up so that while foo is on the VPN bar can access http://foo:8084/ (or http://x.x.x.x:8084/, or whatever)? (From my limited understanding of how VPNs work I have a sneaking suspicion the answer is no, but it doesn't hurt to ask...)

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• VPN is working, except for DNS lookups. Firewall (Cisco ASA 5505) issue?

  - by macke

  I've got the following set up: LAN -> DHCP / DNS / VPN server (OSX 10.6) -> Cisco ASA 5505 -> WAN Connecting to the LAN via VPN works fine. I get all the details properly and I can ping any host on the internal network using their IP. However, I can't do any host lookups whatsoever. I've looked through the logs on and found this nugget in the firewall log: 3 Sep 08 2010 10:46:40 305006 10.0.0.197 65371 portmap translation creation failed for udp src inside:myhostname.local/53 dst inside:10.0.0.197/65371 Port 53 is dns services, no? Because of that log entry, I'm thinking that the issue is with the firewall, not the server. Any ideas? Please keep in mind that I have very little knowledge and experience with this kind of firewall and the little experience I do have is with the ASDM GUI console, not the CLI console.

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• pptp server 2003 hands out gateway from nic not dhcp server

  - by Pete

  I have created a pptp RRAS server for a handful of clients to connect to. I would like them to use the servers default gateway (.1) for internet access. They are able to successfully connect (& see LAN) but it then cuts them off the internet. I understand that all internet traffic would be routed through the pptp server but that's ok since I have enough pipe. The problem seems to be that: the clients gateway shows as their assigned RAS ip. The clients assigned DNS settings seem to be what is set to the servers nic not what I have specified in dhcp (which is the same server). DHCP relay agent properties points to the nic DHCP is running on (192.168.100.163). .1 is gateway in nic hw properties & dhcp. I have different dns secondary & third entries on my nic properties than what dhcp is configured for. The problem is that I have a 10.10.1.x network that people can not see if they uncheck the gateway option but, they are then unable to see our other hosted sites on the internet.

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• How to control remote access to Sonicwall VPN beyond passwords?

  - by pghcpa

  I have a SonicWall TZ-210. I want an extremely easy way to limit external remote access to the VPN beyond just username and password, but I do not wish to buy/deploy a OTP appliance because that is overkill for my situation. I also do not want to use IPSec because my remote users are roaming. I want the user to be in physical possession of something, whether that is a pre-configured client with an encrypted key or a certificate .cer/.pfx of some sort. SonicWall used to offer "Certificate Services" for authentication, but apparently discontinued that a long time ago. So, what is everyone using in its place? Beyond the "Fortune 500" expensive solution, how do I limit access to the VPN to only those users who have possession of a certificate file or some other file or something beyond passwords? Thanks.

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• How to create a VPN between a Host and VMWare VMs?

  - by Anindya Chatterjee

  I have a set of machines as follows My home laptop running Win7 Ultimate with internet connection. A vmware workstation vm running Windows Server 2003 Standard edition server in my laptop w/o internet connectivity Some of my peers' machines connected to internet I want to create a VPN with these machines, provided the VM will not have any direct internet connection and my peers should able to connect to the SVN server application running on this Win2003 server VM. Can anybody please suggest me how to setup this network, what software I need to install in both physical machine and vm, what kind of network connectivity should be there between vmware guest and host machine? EDIT: I deliberately don't want to connect the VM with internet. The host will work more of a gateway of the VPN connection for the VM.

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• How can I port forward over a VPN NAT?

  - by Charlie

  I have a multi-site VPN currently running with pfSense boxes and currently using OpenVPN. However I can change the OS and VPN type if need be. The main router has a 10.13.0.0/16 subnet and a series of public IPs For example, a branch has a 10.12.1.0/24 subnet How can I port forward NAT traffic on a public IP of the main router to a server behind the NAT of the second? So for instance port 95 on a public IP assigned to the main router forwards to 10.12.1.102 on the other router. Is this even possible? Currently my setup works great but only for intertnal traffic

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• Connect macbook to my LAN through a VPN - best solution? [closed]

  - by LewisMc

  So I have a LAN connected via a ADSL/PPPoA, this is using a bog-standard DLink router supplied by my ISP (talktalk UK). I have a NAS within the LAN that is running FreeNAS and I want to be able to connect to it when I'm out and about. It's running an atom so it's quite low on juice consumption but I don't want to have it on all day and night so I've been waking it via a magic packet and booting it down from the web admin when I need it. So I want to connect to the LAN, I presume via a VPN, to be able to send a magic packet. But what is the best method to accomplish this, or is there an easier way? I've been looking at the cisco 857 integrated router and the Netgear prosafe 318(behind modem) but not sure If I'm on the right track with what I want to achieve as I've not much experience or knowledge with VPN's or networking (software engineering student). I have tried port forwarding but to no avail, either with magic packets or even connecting outside the LAN via DYNDNS. Thanks,

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• How to map a VPN (tun0) network adapter on host Ubuntu to a VirtualBox guest Windows?

  - by Mashimom

  I have a Ubuntu 10.04 running Oracle VirtualBox 3.2.6 with a Windows XP guest. I use a VPN that I would like to be accessed by the guest VM, on a ifconfig it shows as: tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:5.192.10.99 P-t-P:5.192.10.99 Mask:255.255.255.255 UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1362 Metric:1 RX packets:14151 errors:0 dropped:0 overruns:0 frame:0 TX packets:19860 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:4415271 (4.4 MB) TX bytes:17949982 (17.9 MB) Using NAT or Bridge adapters on the VM only gives me the non-vpn adapter. How can I map the tun0 adapter to VirtualBox?

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• How to redirect / route VPN traffic to back standing local network?

  - by Milkywayfarer

  There are two computers one "HOME" with Ubuntu 10.10 installed, and another "WORK" with WinXP installed. WORK PC is behind draconian firewall. However, let's imagine, that there is VPN connection installed between this 2 work stations, for example, with teamviewer, hamachi, openvpn, or by some other mean (by the way, what is the best mean for such purposes?). One is interested in working with WORK's LAN resources from his HOME computer via VPN. So my question is about configuration required to be done on WinXP machine (or, maybe on both machines), to make such interaction possible? I'm guessing that some routing stuff should be performed somewhere. But I don't know what exactly and how to do?

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• Would you embrace a new technology that worked better than a VPN?

  - by Jumpto

  Ok so VPNs have been around for ages. Business has been addicted to them as the only method of securing their home servers with their workstations in the field. Even with all their problems and shortcomings. So my question is this: How likely are you to embrace a new technology that promises to work better, secure better and have more features than a VPN? State your reasons for or against. Extra points if you point out what steps the new technology would have to take to knock VPN off its throne.

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• do I need to create an AD site for VPN network

  - by ykyri

  I have Windows Domain level 2008 R2. There are four GC DC in four different physical locations. I have Kerio-based VPN network for replication and remote administration. Here is how network configured: dc1: local IP: 192.168.0.10 VPN IP: 192.168.1.10 dc2: local IP: 10.10.8.11 VPN IP: 192.168.1.11 dc3: local IP: 10.10.9.12 VPN IP: 192.168.1.12 dc4: local IP: 10.10.10.13 VPN IP: 192.168.1.13 That's simple, replication and all works fine but when running dcdiag on dc3 I have an error: A warning event occurred. EventID: 0x000016AF During the past 4.12 hours there have been 216 connections to this Domain Controller from client machines whose IP addresses don't map to any of the existing sites in the enterprise. <...> The log(s) may contain additional unrelated debugging information. To filter out the needed information, please search for lines which contain text 'NO_CLIENT_SITE:'. The first word after this string is the client name and the second word is the client IP address. Here is netlogon.log lines example: 05/30 12:07:39 DOMAIN.NAME: NO_CLIENT_SITE: dc2 192.168.1.11 05/31 09:52:11 DOMAIN.NAME: NO_CLIENT_SITE: dc4 192.168.1.13 05/31 19:49:31 DOMAIN.NAME: NO_CLIENT_SITE: adm-note 192.168.1.101 07/01 05:16:26 DOMAIN.NAME: NO_CLIENT_SITE: dc1 192.168.1.10 All VPN-joined computers are generates same log line as above. Computer amd-note is for example administrator's notebook, also have VPN. Question is should I add new AD site and bind VPN subnet 192.168.1.0/24 with that site?

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• RRAS VPN on windows 2k3 AD, can access rras server only.

  - by nopsax

  I'm setting up a test lab and here is the current configuration: 192.168.86.201 - a windows 2003 machine acting as PDC with AD/DNS/DHCP/WINS. 192.168.86.62 - windows 2003 machine is the RRAS server with IAS, also a file/print server. 192.168.86.6 - gateway/router to internet 192.168.86.21 - Windows XP Workstation Everything works on the internal network, File/Print/AD etc. Whenever a user connects via vpn to the RRAS server remotely using their domain credentials, they are assigned an ip address from the 192.168.86.201 machine along with the wins server address etc. The vpn user can then ping/access resources on the RRAS server, but cannot ping/access resources of any other machines by name or ip. However, if I ping by name, it does resolve to the correct ip address, just no replies. I did notice that on the RRAS server the 'internal' interface gets an ip address of 192.168.86.75 when a remote user connects, and the remote user is assigned, for example 192.168.86.71 . The RRAS server responds on both the .62 and .75 ip addresses. The client also unchecks the 'use remote default gateway option'. Also, I tried connecting a laptop to the physical network, joining the domain, then going remote and dialing the connection before domain login, and everything seems to work, e.g. browse-able shares via network neighborhood. But I can't really join the domain remotely if I cannot access any other resources. I really need to monitor traffic to see whats happening to those packets but won't be able to until this weekend. Any help is appreciated, will provide whatever configurations are needed.

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• How to set up a VPN Incoming connection with Windows to tunnel Internet traffic?

  - by Mehrdad

  I want to set up a VPN on a remote server to route all my Internet traffic for privacy reasons. I can set up an incoming connection and connect to it successfully. The problem is, I can just see the remote computer and no other Web sites will open. I want the remote server to act like a NAT. How can I do that? Note that I don't want to split Internet traffic. I actually want to send all the traffic to the remote server but need to make it relay the traffic. For the record, my remote server is Windows Web Server 2008 which does not have routing and remote access service. Clarification I'm mostly interested in server configuration. I don't have any problems configuring the client. By the way, Windows Web Server 2008 seems to have the same VPN features built in client OSes (like Vista) and specifically, it doesn't include the RRAS console in MMC. I'm also open to suggestions regarding third party PPTP/L2TP daemons available, if they are free.

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• Once VPN connection is done, how do I proceed reaching the other side address space?

  - by sports

  I'm using Windows Azure and I created a VPN Site To Site, configured like this: My virtual network: My address space: 10.2.0.0/16 (65531) Subnet1: 10.2.1.0/24 (251) Subnet2: 10.2.2.0/24 (251) Gateway: 10.2.3.0/29 (3) My public gateway IP: 137.135.x.z (I wont show x and z for security reasons) This public gateway uses, as you can see, 5 IPs on subnet1 and 5 IPs on subnet2, and 5 IPs on the gateway "Their" virtual network (in azure this would be a "Local network") Their address space: 172.60.100.67/32, 172.60.100.68/32, 172.60.100.69/32 Their device public IP: x.x.x.x (ommited for security reasons) Notice their address space are 3 IPs So: the VPN is "in green" (in Azure is showing up green, literally, like these two are connected) and now my question is: How do I proceed to reach their address space? I've tried creating a virtual machine (Windows Server 2008, but it could be an Ubuntu) on "my" virtual network and it is automatically "placed" on subnet1 or subnet2. So it gets the IP 10.2.1.0 (valid example), I can't choose to place the virtual machine in the gateway address space. How do I "reach" any of the IPs 172.60.100.67, 172.60.100.68, 172.60.100.69 ? In other words: How can I telnet any of these IPs? or ping? or see them in my network? Please provide me answers for Windows Server 2008 or for an Ubuntu. I'm open to create any virtual machine.

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