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• How do I set up dual monitors on Kubuntu 10.04 using the latest nVidia drivers with a 9800M video ca

  - by NoCatharsis

  I'm a Linux newb so please try to keep the lingo low-key. I installed the latest nVidia drivers on my laptop using the 9800M card. The laptop is a Gateway P-7805u and I'm connected to the second monitor using VGA. Also, before installing the nVidia drivers (and just using the basic drivers included with Kubuntu 10.04), basic dual monitor support worked, except I could not enable compositing features for some reason. So I thought the proprietary drivers would fix this. Several issues have arisen since installation: 1) I've clicked through all of the display settings to activate the second screen with absolutely no change. 2) When I try to apply settings and Save Configuration as the nVidia help suggests, I am told that I cannot save to the X.conf file. I assume this is due to innate permissions on my user settings, which I have no idea how to properly configure. 3) I have no idea where to go from here, as most of the fixes I found online involve Linux syntax and verbiage, to which I'm totally clueless after spending over half my life with Windows.

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• xen + debian network after upgrade squeeze to wheeze

  - by rush

  I've got a Debian + Xen server. After a system upgrade to the stable version the network doesn't come up after boot. Every time after reboot I need to bring it up manually. The network configuration was not changed during upgrade. Here is /etc/network/interfaces: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 11.22.33.44 netmask 255.255.255.0 gateway 11.22.33.1 nameserver 8.8.8.8 After boot ip r shows no route and eth0 has no ip address. Manually ip and route setup goes fine and network starts working. Messages from dmesg about network I've found (looks like nothing interesting) [ 3.894401] ACPI: Fan [FAN3] (off) [ 3.894444] ACPI: Fan [FAN4] (off) [ 4.178348] e1000e 0000:00:19.0: eth0: (PCI Express:2.5GT/s:Width x1) 00:1e:67:14:66:c9 [ 4.178351] e1000e 0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection [ 4.178392] e1000e 0000:00:19.0: eth0: MAC: 10, PHY: 11, PBA No: 0100FF-0FF [ 4.178413] e1000e 0000:02:00.0: Disabling ASPM L0s L1 [ 4.178432] xen: registering gsi 16 triggering 0 polarity 1 -- [ 4.223667] ata5: DUMMY [ 4.223668] ata6: DUMMY [ 4.289153] e1000e 0000:02:00.0: eth1: (PCI Express:2.5GT/s:Width x1) 00:1e:67:14:66:c8 [ 4.289155] e1000e 0000:02:00.0: eth1: Intel(R) PRO/1000 Network Connection [ 4.289245] e1000e 0000:02:00.0: eth1: MAC: 3, PHY: 8, PBA No: 1000FF-0FF [ 4.506908] usb 1-1: new high-speed USB device number 2 using ehci_hcd [ 4.542920] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300) -- [ 10.362999] EXT4-fs (dm-23): mounted filesystem with ordered data mode. Opts: (null) [ 10.419103] EXT4-fs (dm-3): mounted filesystem with ordered data mode. Opts: (null) [ 10.988255] ADDRCONF(NETDEV_UP): eth1: link is not ready [ 13.175533] Event-channel device installed. [ 13.287555] XENBUS: Unable to read cpu state -- [ 13.288670] XENBUS: Unable to read cpu state [ 13.965939] Bridge firewalling registered [ 14.134048] e1000e: eth1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx [ 14.283862] ADDRCONF(NETDEV_UP): peth0: link is not ready [ 14.284543] ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready [ 17.800627] e1000e: peth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: Rx/Tx [ 17.801377] ADDRCONF(NETDEV_CHANGE): peth0: link becomes ready [ 18.307278] device peth0 entered promiscuous mode [ 24.538899] eth1: no IPv6 routers present [ 28.570902] peth0: no IPv6 routers present I've upgraded two servers and I've such behaviour on two of them. How to fix this and get network starts automatically on boot?

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• Cisco ASA user authentication options - OpenID, public RSA sig, others?

  - by Ryan

  My organization has a Cisco ASA 5510 which I have made act as a firewall/gateway for one of our offices. Most resources a remote user would come looking for exist inside. I've implemented the usual deal - basic inside networks with outbound NAT, one primary outside interface with some secondary public IPs in the PAT pool for public-facing services, a couple site-to-site IPSec links to other branches, etc. - and I'm working now on VPN. I have the WebVPN (clientless SSL VPN) working and even traversing the site-to-site links. At the moment I'm leaving a legacy OpenVPN AS in place for thick client VPN. What I would like to do is standardize on an authentication method for all VPN then switch to the Cisco's IPSec thick VPN server. I'm trying to figure out what's really possible for authentication for these VPN users (thick client and clientless). My organization uses Google Apps and we already use dotnetopenauth to authenticate users for a couple internal services. I'd like to be able to do the same thing for thin and thick VPN. Alternatively a signature-based solution using RSA public keypairs (ssh-keygen type) would be useful to identify user@hardware. I'm trying to get away from legacy username/password auth especially if it's internal to the Cisco (just another password set to manage and for users to forget). I know I can map against an existing LDAP server but we have LDAP accounts created for only about 10% of the user base (mostly developers for Linux shell access). I guess what I'm looking for is a piece of middleware which appears to the Cisco as an LDAP server but will interface with the user's existing OpenID identity. Nothing I've seen in the Cisco suggests it can do this natively. But RSA public keys would be a runner-up, and much much better than standalone or even LDAP auth. What's really practical here?

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• Restrict Computer or Users from Internet but allow access to intranet and Windows Update / ePO?

  - by MoSiAc

  So this may be impossible but I've been asked to try and find something about it. So far nothing I have found is possible. I need to restrict specific machines or user accounts from regular Internet access but let them have access to the intranet portion of our network. I do not have Active Directory control, nor does anyone at my local workplace (corporate control in a different state). I have tried going through IPsec and doing this per local machine, but that system seems to have been removed from the images that are installed on these machines so that is out. So far the only other option I can think of is assigning the machines a specific ip address and removing their gateway access. This would probably work but the machines need to be able to receive updates that are being pushed to them through ePO and LanDesk. I would really like to do this on the user level because then if I need to do tech work to the machine and need internet access I can get to it but a "special" user could login and not be able to get into anything.

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• KVM virtual machine unable to access internet

  - by peachykeen

  I have KVM set up to run a virtual machine (Windows Home Server 2011 acting as a build agent) on a dedicated server (CentOS 6.3). Recently, I ran updates on the host, and the virtual machine is now unable to connect to the internet. The virtual network is running through NAT, the host has an interface (eth0:0) set up with a static IP (virt-manager shows the network and its IP correctly), and all connections to that IP should be sent to the guest. The host and guest can ping one another, but the guest cannot ping anything above the host, nor can I ping the guest from anywhere else (I can ping the host). Results from the guest to another server under my control and from an external system to the guest both return "Destination port unreachable". Running tcpdump on the host and destination shows the host replying to the ping, but the destination never sees it (it doesn't even look like the host is bothering to send it on at all, which leads me to suspect iptables). The ping output matches that, listing replies from 192.168.100.1. The guest can resolve DNS, however, which I find rather odd. The guest's network settings (connection TCP/IPv4 properties) are set up with a static local IP (192.168.100.128), mask of 255.255.255.0, and gateway and DNS at 192.168.100.1. When originally setting up the vm/net, I had set up some iptables rules to enable bridging, but after my hosting company complained about the bridge, I set up a new virtual net using NAT and believe I removed all the rules. The VM's network was working perfectly fine for the last few months, until yesterday. I haven't heard anything from the hosting company, didn't change anything on the guest, so as far as I know, nothing else has changed (unfortunately the list of packages updated has since fallen off scrollback and I didn't note it down).

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• Ubuntu server apt-get says "(-5 - No address associated with hostname)"

  - by Srini

  I have a ubuntu 12.04 server. Running sudo apt-get update on it produces errors like this: W: Failed to fetch http://au.archive.ubuntu.com/ubuntu/dists/precise-backports/main/binary-i386/Packages Something wicked happened resolving 'au.archive.ubuntu.com:http' (-5 - No address associated with hostname) I am able to ping all the other hosts on the network and also Google's DNS 8.8.8.8. But am unable to ping www.google.com. So, I'm guessing something is wrong with my DNS setup, but not sure what. I use static IP and my /etc/network/interfaces looks like this: auto eth0 iface eth0 inet static address 192.168.1.50 netmask 255.255.255.0 network 192.168.1.0 broadcast 192.168.0.255 gateway 192.168.1.1 #dns-nameserver 203.12.160.35 203.12.160.36 #nameserver 203.12.160.35 203.12.160.36 My /etc/resolv.conf and /etc/resolvconf/resolv.conf.d/base are both empty and my /etc/resolvconf/resolv.conf.d/original says: nameserver 192.168.1.1 Any help would be greatly appreciated. P.S. I've googled it a bit and the common resolution is to switch to DHCP which I don't want to do since this is my home server. Thanks Srini

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• trying to route between two openvpn clients

  - by user42055

  I have two openvpn clients on the 10.0.1.0 (client1) and 192.168.0.0 (client2) subnets with the server's openvpn connection having the ip 192.168.150.1 The server has ip forwarding enabled. Currently, client1's vpn ip is 192.168.150.10 and the P-t-P ip is 192.168.150.9 I have created the following static route on client1: route add -net 10.0.1.0 netmask 255.255.255.0 gw 192.168.150.9 The routing table on client1 looks like this: Destination Gateway Genmask Flags MSS Window irtt Iface 192.168.150.9 0.0.0.0 255.255.255.255 UH 0 0 0 tun0 192.168.150.1 192.168.150.9 255.255.255.255 UGH 0 0 0 tun0 10.0.1.0 192.168.150.9 255.255.255.0 UG 0 0 0 tun0 192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo 0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth0 I thought this would be correct to allow traffic from client1 to reach computers on client2's network, but it does not work. Is 192.168.150.9 (the P-t-P address) the correct one to be routing through ? I tried using 192.168.150.1 but I couldn't create the route. I hope this is clear.

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• Setting up /etc/network/interface file for KVM ubuntu 10.10

  - by Charles Thornton

  I am trying to setup KVM on Unbuntu 10.10 IFCONFIG DUMP: hydra(~}$ifconfig eth0 Link encap:Ethernet HWaddr 00:1b:fc:cb:77:eb inet addr:172.20.20.3 Bcast:172.20.20.255 Mask:255.255.255.0 inet6 addr: fe80::21b:fcff:fecb:77eb/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1345 errors:0 dropped:0 overruns:0 frame:0 TX packets:1541 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:820414 (820.4 KB) TX bytes:317708 (317.7 KB) Interrupt:23 Base address:0xc000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:8 errors:0 dropped:0 overruns:0 frame:0 TX packets:8 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:480 (480.0 B) TX bytes:480 (480.0 B) virbr0 Link encap:Ethernet HWaddr 0a:1e:fb:b4:77:84 inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 inet6 addr: fe80::81e:fbff:feb4:7784/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:56 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 B) TX bytes:8934 (8.9 KB) hydra(~}$ QUESTION:: How should /etc/network/interfaces be setup?? The following attempt just kills my internet connection! --------- /etc/network/interfaces ------------- # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet manual auto br0 iface br0 inet static address 172.20.20.3 netmask 255.255.255.0 network 172.20.20.0 broadcast 172.20.20.255 gateway 172.20.20.1 bridge_ports eth0 bridge_fd 9 bridge_hello 2 bridge_maxage 12 bridge_stp off What am I doing wrong????

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• Windows 2008 R2 DHCP Overlapping Scopes

  - by Buska

  We are trying to troubleshoot a scope overlap problem. We have multiple device types we wish to give all different ranges of a 16 bit subnet. IE. X device we wish to give 192.168.2.1-192.168.2.254/16, Y devices we wish to give 192.168.3.1-192.168.3.254/16. We are trying to accomplish this by creating different scopes and using the 60 class identifier. The problem is DHCP won't allow us to give these scopes with 16 bit masks because of the potential overlap. We aren't overlapping the address pool so why does DHCP care and can we work around this? If this isn't possible, how can i assign specific ranges by device type without creating multiple scopes? Any thoughts would be helpful. UPDATE: Entire Scope is 192.168.0.0/16 Gateway is 192.168.1.1/16 Device Hardware A - 192.168.20.1-192.168.20.254/16 Device Hardware B - 192.168.26.1-192.168.26.254/16 Device Hardware C - 192.168.85.1-192.168.85.254/16 We tried to setup multiple scopes for each device type (A,B,C) but couldn't specify a 16 bit mask as Scope A could technically overlap Scope B even thought our start and end addresses don't. I hope this makes more sense. Thanks for your thoughts.

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• Can't ping localhost/or reach locally hosted domain

  - by Ian

  I can't reach a locally hosted domain, and in testing I have discovered I can't ping localhost or the actual IP either. OS is Windows7 64bit, Pro. DNS works, I can ping others on my network, they can ping me, and they can reach the hosted domain. The ONLY problem I have found is that I can't reach the locally hosted domains! C:\Users\ianipconfig /all Windows IP Configuration Host Name . . . . . . . . . . . . : leda Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Hybrid IP Routing Enabled. . . . . . . . : No WINS Proxy Enabled. . . . . . . . : No DNS Suffix Search List. . . . . . : hcs Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : hcs Description . . . . . . . . . . . : Atheros AR8121/AR8113/AR8114 PCI-E Ethern et Controller Physical Address. . . . . . . . . : 00-23-54-7C-E2-2A DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes IPv4 Address. . . . . . . . . . . : 192.168.0.12(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.0.1 DNS Servers . . . . . . . . . . . : 192.168.0.1 NetBIOS over Tcpip. . . . . . . . : Enabled Ethernet adapter VirtualBox Host-Only Network #2: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : VirtualBox Host-Only Ethernet Adapter #2 Physical Address. . . . . . . . . : 08-00-27-00-88-4A DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes Autoconfiguration IPv4 Address. . : 169.254.205.215(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.0.0 Default Gateway . . . . . . . . . : NetBIOS over Tcpip. . . . . . . . : Enabled C:\Users\ianping localhost Pinging leda [127.0.0.1] with 32 bytes of data: Request timed out. Request timed out. Request timed out. Request timed out. Ping statistics for 127.0.0.1: Packets: Sent = 4, Received = 0, Lost = 4 (100% loss), C:\Users\ianping coachmaster.leda.hcs Pinging coachmaster.leda.hcs [192.168.0.12] with 32 bytes of data: Request timed out. Request timed out. Request timed out. Request timed out. Ping statistics for 192.168.0.12: Packets: Sent = 4, Received = 0, Lost = 4 (100% loss), C:\Users\ian I can reach a hosted VM in VirtualBox and the VM can browse the hosted sites. I've removed Zone Alarm and disabled Windows Firewall - same results. So how can I browse my locally hosted sited? What could be blocking it? Thanks Ian

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• Wireless Access Point stopped working

  - by Alex Pritchard

  I have a simple LAN set up at home using a Linksys WRT54GSV4 as my primary router and an Encore ENHWI-2AN3 as an access point. I connect the Encore to the Linksys by running a cable from one of the Linksys LAN ports into the Encore WAN input. I originally configured this using the Encore setup wizard, setting the device up in AP Router Mode. It detected the input network and worked about as expected, creating a second network that used my primary network to connect to the internet. It worked fine for about 2 weeks, then abruptly cut out today. I checked to make sure the network was still live through the cable going into the Encore (provides internet when connected to a laptop directly) and that devices are still able to connect to the network being broadcast by the Encore. When I try to rerun the connection wizard on the Encore, I receive the message "No Services found in WAN port." The WAN Settings is no longer retrieving a dynamic ip from the line. I tried providing a static IP, assigning an IP address within the subnet range of my primary router that wasn't being used and pointing the Default Gateway to the Linksys IP, but this did not work either. When I plug the cable into the WAN port, an internet light comes on that is not lit when a live network is not connected. I've tried doing a hard reset on the Encore (held down the rest button until the lights flashed, reconfigured from scratch), but the WAN settings are still not detected. Also tried powering off and on the modem, linksys, and encore. Any suggestions would be appreciated!

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• Two internet connections at once in Windows 7

  - by webmasters

  I have a 3G wireless modem and I have a LAN - Right now they are both connected. I need a way to choose which applications will use the 3G connection and which applications will use the LAN. My Operating System is windows 7. How can I do this? Any ideas? Here is a route print: - the 3G modem's IP is 10.81.132.96 Lets say, for example, map google.com to using the 3G internet connection. IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 0.0.0.0 0.0.0.0 192.168.2.1 192.168.2.102 20 0.0.0.0 0.0.0.0 10.81.132.97 10.81.132.111 286 10.81.132.96 255.255.255.224 On-link 10.81.132.111 286 10.81.132.111 255.255.255.255 On-link 10.81.132.111 286 10.81.132.127 255.255.255.255 On-link 10.81.132.111 286 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 192.168.2.0 255.255.255.0 On-link 192.168.2.102 276 192.168.2.102 255.255.255.255 On-link 192.168.2.102 276 192.168.2.255 255.255.255.255 On-link 192.168.2.102 276 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 224.0.0.0 240.0.0.0 On-link 192.168.2.102 276 224.0.0.0 240.0.0.0 On-link 10.81.132.111 286 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 255.255.255.255 255.255.255.255 On-link 192.168.2.102 276 255.255.255.255 255.255.255.255 On-link 10.81.132.111 286 ===========================================================================

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• allow spoofing when using tun

  - by Johnny

  I have a working openvpn setup with a server and a number of clients. How would i go around allowing IP spoofing through the openvpn server? (to demonstrate security concepts)? A normal ping from client to server goes through all right: root@client: hping3 10.8.0.1 HPING 10.8.0.1 (tun0 10.8.0.1): NO FLAGS are set, 40 headers + 0 data bytes len=40 ip=10.8.0.1 ttl=64 DF id=0 sport=0 flags=RA seq=0 win=0 rtt=124.7 ms root@server:/etc/openvpn# tcpdump -n -i tun0 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on tun0, link-type RAW (Raw IP), capture size 65535 bytes 10:17:51.734167 IP 10.8.0.6.2146 > 10.8.0.1.0: Flags [], win 512, length 0 But when spoofing a packet, it does not arrive at the openvpn server: root@client: hping3 -a 10.0.8.120 10.8.0.1 HPING 10.8.0.1 (tun0 10.8.0.1): NO FLAGS are set, 40 headers + 0 data bytes root@server:/etc/openvpn# tcpdump -n -i tun0 tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on tun0, link-type RAW (Raw IP), capture size 65535 bytes My current config files server.conf local X.Y.Z.P port 80 proto tcp dev tun ca ca.crt cert server.crt key server.key # This file should be kept secret dh dh1024.pem server 10.8.0.0 255.255.255.0 push "redirect-gateway def1 bypass-dhcp" keepalive 10 120 comp-lzo persist-key persist-tun persist-local-ip status openvpn-status.log verb 3 client.conf client dev tun proto tcp remote MYHOST..amazonaws.com 80 resolv-retry infinite nobind persist-key persist-tun ca ca.crt cert client.crt key client.key ns-cert-type server comp-lzo verb 3

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• Why does my Windows 8 Pro Hyper-V guest have no internet?

  - by Perplexed

  Trying to get this working on my Windows 8 Pro machine. I created an External Switch Assigned the newly available adapter to a Guest machine with Win 2008 os. My host has internet connection. Host can ping Guest, Guest cannot ping Host. Guest has no internet connection. Pasting the IP of both host and guest. HOST ========================== Ethernet adapter vEthernet (EXTSW01): Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Hyper-V Virtual Ethernet Adapter #2 Physical Address. . . . . . . . . : 9C-B7-0F-0F-D7-D0 DHCP Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::5434:a9fd:8611:d207%54(Preferred) IPv4 Address. . . . . . . . . . . : 192.168.0.15(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Lease Obtained. . . . . . . . . . : Saturday, September 8, 2012 12:34:44 PM Lease Expires . . . . . . . . . . : Saturday, September 15, 2012 12:34:44 PM Default Gateway . . . . . . . . . : 192.168.0.1 DHCP Server . . . . . . . . . . . : 192.168.0.1 DHCPv6 IAID . . . . . . . . . . . : 916240141 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-17-DC-C9-2C-9C-B7-0D-0D-D7-D0 DNS Servers . . . . . . . . . . . : 64.71.255.999 NetBIOS over Tcpip. . . . . . . . : Enabled GUEST ========================== Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : Microsoft Virtual Machine Bus Network Adapter Physical Address. . . . . . . . . : 00-15-5D-3F-0F-00 DHCP Enabled. . . . . . . . . . . : No Autoconfiguration Enabled . . . . : Yes Link-local IPv6 Address . . . . . : fe80::953f:ec5c:5d84:1b50%11(Preferred) IPv4 Address. . . . . . . . . . . : 192.168.0.20(Preferred) Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 0.0.0.0 DHCPv6 IAID . . . . . . . . . . . : 234886493 DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-17-DD-2F-29-0F-15-5E-00-0F-00 DNS Servers . . . . . . . . . . . : ::1 127.0.0.1 NetBIOS over Tcpip. . . . . . . . : Enabled

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• How can I create a VLAN on my extreme switch for a seperate subnet/domain?

  - by drpcken

  I'm putting together a small active directory implementation for a buddy of mine. I currently have 2 servers (one is the primary domain controller) and a couple clients. I need to test and run updates on every machine on this domain, but I would have plug them into my current LIVE domain to get it internet access. From what I've read having two separate domains on a single subnet is a bad idea (even though it is temporary) so I don't want to risk messing anything up on my production domain. I'm pretty sure I can create a separate VLAN on my extreme 48 port switch and plug this smaller domain into it on a different subnet, but I don't know the commands. Both subnets would need internet access of course (one of the things I can't wrap my head around is routing internet traffic between subnets (gateway is on production subnet). My production domain is on subnet 192.168.200.0. My new domain I want to put online would go into subnet 192.168.10.0. A shove in the right direction would be greatly appreciated. Thank you!

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• VirtualBox with Ubuntu Server guest can't ping outside

  - by Danidan

  Here's my situation: an Ubuntu 12.04 Host running VirtualBox; two guest VMs running Ubuntu Server 12.04 home network, so my Host pc has a wireless connection to the router of my ISP. My problem is in one of the virtual machines: it has 3 NICs, one in NAT mode and the others in Host Only mode. My purpose is to use eth0 (NAT) for Internet access and eth1, eth2 (Host Only) for management of internal virtual network (eth1 uses a VBoxNet with this IP 192.168.69.254). Whenever I try to $ping 8.8.8.8 I get Destination Host Unreachable. While if I $ping 192.168.69.10, that is the IP of the other VM, it works. I can't also ping my Host nor my router My /etc/network/interfaces file is: auto lo iface lo inet loopback auto eth0 iface eth0 inet dhcp auto eth1 iface eth1 inet static address 192.168.69.1 netmask 255.255.255.0 auto eth2 iface ifconfig $IFACE 0.0.0.0 up up ip link set $IFACE promisc on down ip link set $IFASE promisc off down ifconfig $IFACE down $route -n returns: Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 10.0.2.2 0.0.0.0 UG 100 0 0 eth0 10.0.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 192.168.69.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 192.168.100.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0 Forgetting for now what eth2 needs to do and its setup, why I can't go outside the Host box? What can I do to help you helping me? :-)

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• Why do I have redundant routing in Windows 7?

  - by Mark

  I'm trying to better understand my routing tables. My routing table is: IPv4 Route Table =========================================================================== Active Routes: Network Destination Netmask Gateway Interface Metric 1. 0.0.0.0 0.0.0.0 192.168.1.1 192.168.1.151 25 2. 127.0.0.0 255.0.0.0 On-link 127.0.0.1 306 3. 127.0.0.1 255.255.255.255 On-link 127.0.0.1 306 4. 127.255.255.255 255.255.255.255 On-link 127.0.0.1 306 5. 192.168.1.0 255.255.255.0 On-link 192.168.1.151 281 6. 192.168.1.151 255.255.255.255 On-link 192.168.1.151 281 7. 192.168.1.255 255.255.255.255 On-link 192.168.1.151 281 8. 224.0.0.0 240.0.0.0 On-link 127.0.0.1 306 9. 224.0.0.0 240.0.0.0 On-link 192.168.1.151 281 10. 255.255.255.255 255.255.255.255 On-link 127.0.0.1 306 11. 255.255.255.255 255.255.255.255 On-link 192.168.1.151 281 =========================================================================== Most of those entries make sense to me, but a few confuse me: 2 and 3 seem redundant, as do 2 and 4. Why not just 2? 5 and 6 seem redundant, as do 5 and 7. Why not just 5? I'm trying to grok routing tables and this bit is still confusing me.

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• network routing between mac & virtual XP

  - by Kevin

  Hi - I have a max laptop running XP inside VirtualBox. The network is setup to be a "Bridged Adapter" so that the IPs for both the host & guest OS's are assigned by my wireless routed. My guest XP has Nortel VPN connecting to corporate lan. When this is connected, I want to allow my host Mac OS to access the corporate network. But I'm struggling. Without Nortel VPN running, I can change routing on the mac so all traffic is sent via the guest XP - this works. But once I activate the VPN, this no longer works. If I try to change the routing on mac to run through the IP address assigned to the Nortel adapter, I get a "Network is unreachable" error. Below is the output from ipconfig /all on the guest XP OS. I'm beginning to believe that what I want to do is not possible because of the way Nortel secure the VPN - but before I give up I thought I'd post the problem here. Thanks, Kevin z:\eclipseworkspace\RESMobileSuite\trunk>ipconfig /all Windows IP Configuration Host Name . . . . . . . . . . . . : zzzz-3177b42dd0 Primary Dns Suffix . . . . . . . : Node Type . . . . . . . . . . . . : Unknown IP Routing Enabled. . . . . . . . : Yes WINS Proxy Enabled. . . . . . . . : No DNS Suffix Search List. . . . . . : zzzz.zzz Ethernet adapter Local Area Connection: Connection-specific DNS Suffix . : Description . . . . . . . . . . . : AMD PCNET Family PCI Ethernet Adapter Physical Address. . . . . . . . . : 08-00-XX-XX-XX-XX Dhcp Enabled. . . . . . . . . . . : Yes Autoconfiguration Enabled . . . . : Yes IP Address. . . . . . . . . . . . : 192.168.1.3 Subnet Mask . . . . . . . . . . . : 255.255.255.0 Default Gateway . . . . . . . . . : 192.168.1.1 DHCP Server . . . . . . . . . . . : 192.168.1.1 DNS Servers . . . . . . . . . . . : 192.168.1.1 Lease Obtained. . . . . . . . . . : 30 April 2010 12:22:02 Lease Expires . . . . . . . . . . : 01 May 2010 12:22:02 Ethernet adapter {8EB7A442-9683-45FB-A602-56110A4B3434}: Connection-specific DNS Suffix . : zzzz.zz Description . . . . . . . . . . . : Nortel IPSECSHM Adapter - Packet Scheduler Miniport Physical Address. . . . . . . . . : 44-45-YY-YY-YY-YY Dhcp Enabled. . . . . . . . . . . : No IP Address. . . . . . . . . . . . : XXX.4.52.62 Subnet Mask . . . . . . . . . . . : 255.255.254.0 Default Gateway . . . . . . . . . : XXX.4.52.62 DNS Servers . . . . . . . . . . . : XXX.6.21.36 XXX.6.21.100

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• Vmware Workstation, Win7 host, Ubuntu guests with Nat + Host-only networks but they cannot connect to the Internet

  - by Ikon

  I have a Win7 host machine with Vmware Workstation. In the workstation I have 3 Ubuntu installed. All 3 Ubuntu guests have a Nat network - to access the internet without asking the router for a local address - and a Host-only network - to connect all Ubuntu quests and the host in a private network for internal communication, without touching the router. When I try to make any of the Ubuntu quests to get data from the internet - assuming that they would figure out that the Nat-ed interface can access the requested data - they fail and report that there is no route to my query. If I disconnect the 2nd interface on the Ubuntu guests with the Host-only network and restart networking, they start to know the route to the internet. Odd, during the installation of the guests they asked which of the 2 given interfaces - with Nat and Host-only config - should be used to get updates during installation and they oddly managed to get the updates. Not so after the installation has finished and rebooted. I have checked the Virtual Network Editor that the Nat interface should use my real network card to access the net, so there should be no problem. I wish not to use the router's dhcp service to give the Ubuntu quests an address, and also I don't want the guests to be accessable from the local network directly, but only by the host - that's the Host-only network is for. Any suggestions? Edit: 192.168.189.0 is the Nat interface and 192.168.7.0 is the Host-only. $ route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.7.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 192.168.189.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 0.0.0.0 192.168.189.2 0.0.0.0 UG 100 0 0 eth0

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• How can I ensure that my static ip address is read from /etc/network/interfaces rather than dhcp?

  - by jonderry

  This is a follow up to the following question. I'm trying to set a static IP by changing /etc/network/interfaces to the following: # interfaces(5) file used by ifup(8) and ifdown(8) auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.2.133 netmask 255.255.255.0 gateway 192.168.2.1 dns-nameservers 8.8.8.8 and then running /sbin/ifdown eth0; /sbin/ifup eth0. However, the change in IP address doesn't appear to take effect without editing /etc/dhcp/dhclient.conf and commenting out the following before running ifdown; ifup: request subnet-mask, broadcast-address, time-offset, routers, domain-name, domain-name-servers, domain-search, host-name, dhcp6.name-servers, dhcp6.domain-search, netbios-name-servers, netbios-scope, interface-mtu, rfc3442-classless-static-routes, ntp-servers, dhcp6.fqdn, dhcp6.sntp-servers; Strangely, after commenting out this line, running ifdown; ifup works, but when I uncomment it, the behavior does not revert to the previous behavior of ignoring changes to my settings in /etc/network/interfaces (this doesn't seem like a problem, but I really need to be able to repeat this problem so that I can be confident that my solution is robust) Also, I'd rather not have to edit /etc/dhcp/dhclient.conf to change my static IP since it seems I should be able to do this by only editing interfaces. Can anyone explain the issues I'm seeing above and suggest the best way of making changes to static IP addresses take effect that admits reproducibility so that I can be sure that my approach works?

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• Route web traffic through a separate iterface

  - by tkane

  I'd like to route web traffic through the wlan0 interface and the rest through eth1. Can you please help me with the iptables commands to achieve this. Below is my configuration. Thank you :) Edit: This is about desktop configuration not a web server set up. Basically I want to use one of my connections to browse the web and the other one for everything else. ifconfig: eth1 Link encap:Ethernet HWaddr 00:1d:09:59:80:70 inet addr:192.168.2.164 Bcast:192.168.2.255 Mask:255.255.255.0 inet6 addr: fe80::21d:9ff:fe59:8070/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:33 errors:0 dropped:0 overruns:0 frame:0 TX packets:41 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:4771 (4.7 KB) TX bytes:7081 (7.0 KB) Interrupt:17 wlan0 Link encap:Ethernet HWaddr 00:1c:bf:90:8a:6d inet addr:192.168.1.70 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::21c:bfff:fe90:8a6d/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:77 errors:0 dropped:0 overruns:0 frame:0 TX packets:102 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:14256 (14.2 KB) TX bytes:14764 (14.7 KB) route: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.2.0 * 255.255.255.0 U 1 0 0 eth1 192.168.1.0 * 255.255.255.0 U 2 0 0 wlan0 link-local * 255.255.0.0 U 1000 0 0 wlan0 default adsl 0.0.0.0 UG 0 0 0 eth1

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• Server not resolving after restart

  - by DomainSoil

  I restarted our server today, and now cannot for the life of me get anything to resolve... I suspect it has something to do with our routes. I've tried numerous Google results to no avail. Here is as far as I've gotten: [root@www ~]# route -n Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.1.101 0.0.0.0 255.255.255.255 UH 0 0 0 eth1 0.0.0.0 192.168.1.101 0.0.0.0 UG 0 0 0 eth1 Things you need to know: Our server (CentOS 6.3) runs two virtual machines, one live, and one development. They mirror each other as much as possible, but I can't find where I've went wrong with the live server. The dev server works fine. [root@www ~]# ifconfig eth1 Link encap:Ethernet HWaddr xx:xx:xx:xx:xx:xx inet6 addr: xxxx:xxx:xxxx:xxxx:xxxx/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:118206 errors:0 dropped:0 overruns:0 frame:0 TX packets:165 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:7825749 (7.4 Mib) TX bytes:7146 (69.2 KiB) Interrupt:28 [root@www ~]# /etc/init.d/network status Configured devices: lo Auto eth0 Currently active devices: lo eth1 If there is any other information you need, please don't hesitate to ask!

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• Unable to remove invalid(orphaned?) SPNs

  - by Brent

  tldr version: Renamed domain from internal.domain.com to domain.com, have 4 SPNs that am unable to remove from DC. So my domain was internal.domain-name.com and I renamed it to domain-name.com and I thought everything was good. Several days later, I start setting up my RD Gateway and am noticing issues surrounding group policy. I run dcdiag and the SystemLog part fails. Starting test: SystemLog A warning event occurred. EventID: 0x00001796 Time Generated: 08/25/2014 02:48:30 Event String: Microsoft Windows Server has detected that NTLM authentication is presently being used between clients and this server. This event occurs once per boot of the server on the first time a client uses NTLM with this server. An error event occurred. EventID: 0xC0001B70 Time Generated: 08/25/2014 02:49:18 Event String: The SQL Server (MSSQLSERVER) service terminated with the following service-specific error: An error event occurred. EventID: 0xC0001B70 Time Generated: 08/25/2014 02:49:48 Event String: The SQL Server (MSSQLSERVER) service terminated with the following service-specific error: An error event occurred. EventID: 0xC0001B70 Time Generated: 08/25/2014 02:52:47 Event String: The SQL Server (MSSQLSERVER) service terminated with the following service-specific error: This made me check my AD for possible connections to the .internal domain. I found four which I remove by: setspn -D E3514235-4B06-11D1-AB04-00C04FC2DCD2/d79fa59c-74ad-4610-a5e6-b71866c7a157/internal.domain-name.com ServerName setspn -D HOST/ServerName.domain-name.com/internal.domain-name.com ServerName setspn -D GC/ServerName.domain-name.com/internal.domain-name.com ServerName setspn -D ldap/ServerName.domain-name.com/internal.domain-name.com ServerName Also, checking my dns records, there's an internal subdomain that I can delete but it comes back as well. I've tried removing the spns to no avail. Is there something I'm missing?

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• Trying to Set up SMTP Server on WIndows Server 2012

  - by datc

  I'm working on a website, and I need to test the functionality of sending email messages from ASP.NET, something like this: Dim msg As New MailMessage("email1", "email2") msg.Subject = "Subject"<br> msg.IsBodyHtml = True<br> msg.Body = "Click <a href='site'>here</a>." Dim client As SmtpClient = New SmtpClient() client.Host = "My-Server"<br> client.Port = 25<br> client.DeliveryMethod = SmtpDeliveryMethod.Network<br> client.Send(msg) This is running from a Windows 8 workstation. I've installed SMTP server on my Windows Server 2012 machine. The mail shows up in the mailroot/Queue folder and sits there, eventually getting deposited into Badmail. Now I have AT&T U-verse at home, and a few devices connected to the gateway, including let's call it "My-Server." When I run SmtpDiag from say, datc@... to [email protected] I get SOA serial number match passed, Local DNS (99-135-60-233.lightspeed.bcvloh.sbcglobal.net) & Remote DNS (hotmail.com) tests *not* passed, and ultimately, Connecting to the server failed. Error: 10060. Failed to submit mail to mx2.hotmail.com error. When I set My-Server's IP to static and equal to the external IP, 99.135.60.233, and again run SmtpDiag, I get SOA, Local DNS, and Remote DNS tests passed, but the same 10060 error. Same for yahoo.com, gmail.com, and so forth. Is it my ISP's job to fix this? Some PTR record missing somewhere? Is it at all possible to have a home-based SMTP server? All I want is to test my email code. Perhaps, my IP address is just not "trusted" somehow. Thanks.

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• Strange network connectivity problem

  - by Marc

  Here is my network connectivity: cable modem | |(WAN) wrt54g (default gateway, 192.168.1.1) -- earth |(LAN) | Simple Switch1 | | | | | SimpleSwitch2- neptune | | | | mars mercury | |- venus | |- laptop | saturn (Windows AD DC) simpleSwitch2 was hanging off the wrt54g. I moved it to SW1 during troubleshooting. Nothing described below was any different. earth is connected via wireless to the wrt54g. I can ping from laptop to mars, neptune & mercury. I can ping from earth to venus, saturn & laptop. However, pinging mars, mercury or neptune from earth gives the following result. Pinging mars.XXX.XXX [192.168.1.105] with 32 bytes of data: Reply from 192.168.1.122: Destination host unreachable. Reply from 192.168.1.122: Destination host unreachable. Reply from 192.168.1.122: Destination host unreachable. Reply from 192.168.1.122: Destination host unreachable. Ping statistics for 192.168.1.105: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), .122 is the address of the machine from which I am pinging. earth is a Vista machine. Windows firewall is off. saturn is my DNS & DHCP server. Can anyone give me any ideas what the h*ll is going on? Clearly the topology is a factor And yes, I am a space geek.

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