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  • Distribute IP packets accross different NIC queues with MSI (Message Signalled Interrupts)

    - by Ansis Atteka
    NetXtreme II BCM5709 Gigabit Ethernet NIC supports MSI feature (Message Signaled Interrupts) and it has 8 queues. Each queue has its own Interrupt handler in /proc/interrupts. What I am trying to accomplish is to tell NIC which packets should go to which queue. Questions: Is it possible to manually specify which IP packets should go to which queue by encapsulated protocol type (e.g. IPsec packets go in one queue, while TCP packets go in another queue)? If it is possible - how can I do it under Linux? If it is not possible - should I look at MSI-X capable NIC cards to solve this problem? More details: We have one Interface that is terminating IPSec and forwarding/terminating TCP connections. The IPSec packet decryption is inlined (this means that decryption is done under the same ksoftirqd/X context). We are trying to find out if we will be able to improve total performance if IPSec packets will be scheduled on another CPU than TCP packets. One more limitation is that IPSec code is not MP-safe, hence I can not run it under more than one ksoftirqd/X. By default it seems that packets are distributed/hashed by source IP over the 8 NIC queues. The bottleneck is IPSec that chokes out TCP traffic while it is decrypting/encrypting IPSec packets at ~100% CPU. OS is Ubuntu 10.10 (2.6.32-27-server) and NIC is Broadcom BCM5709.

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  • Network profile reverts to 'Unidentified' following Windows Update reboot

    - by user140575
    I have searched high and low for a solution to this problem. I have multiple servers running Windows 2000 Server as well as Windows Server 2003, 2003 R2, and 2008 R2. All of these servers are on the same Active Directory domain. The servers run showing the network profile as Domain Network, which is fine and correct. However, when a Windows update is installed, the server changes the profile to Unidentified Network once it has rebooted. This then doesn't allow any traffic to the server. For security reasons, we can't turn the firewalls off for. The only way to fix the problem is to physically be in front of the machine and work on it to change the profile back. Once the Profile has been reinstated to the Domain profile, it will be fine until the next month's update. This happens on all the Windows software mentioned above. The machines are not all identical, so it's not a hardware problem either. If anyone can help I'd be very grateful.

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  • NIC interface names in /proc/interrupts

    - by Gallus
    When I look at /proc/interrupts: $ cat /proc/interrupts CPU0 CPU1 (...) 12: 4 0 IO-APIC-edge i8042 14: 145 65310875 IO-APIC-edge ide0 50: 0 0 IO-APIC-level uhci_hcd:usb5, Intel ICH7 58: 5388 7983508 IO-APIC-level libata 169: 812427252 1236572641 IO-APIC-level skge, eth1 217: 6 0 IO-APIC-level ehci_hcd:usb1, uhci_hcd:usb2 225: 0 0 IO-APIC-level uhci_hcd:usb3 233: 60 3108720778 IO-APIC-level uhci_hcd:usb4, skge I can see two skge and one eth1 entries. All of them are the network cards. Because of the general name "skge" (which is the name of the network driver of the card) I can't easily reocognize, which NIC occupies which interrupt. How to make linux use more descriptive names in the entries? Or: Is there any alternative way to obtain INT information instead of /proc/interrupt? My final goal is to manipulate smp_affinities of the NICs.

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  • Using Static Public IPs and Private DHCP IPs on the Same Router

    - by Andrew Larsson
    I have a subnet of public IP addresses that my ISP has provided me with. They are routed through my router (how profound) that has a a static IP. I have successfully assigned the IPs from that subnet to various devices on my network. This works just fine, they get their own public IP, they can access the Internet, and the Internet can access them. However, I would like to also assign some private IPs on my network through that same router and put them behind NAT. Is this even possible? Could a VLAN be of use? I would like to avoid putting another router on the network, which makes this is quite an awkward question.

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  • Skype Optimization - Port Forwarding on a Router

    - by user19185
    I was watching this Video which talked about using port-forwarding to optimize your LAN for skype calls. According to the video, as explained in the first couple of minutes in the video, the reason you would need optimization is because if the person your call has a firewall setup, your connection has to go-through a third-party computer to connect to them. I believe I stated this correct (maybe not). None the less, my question is this: do both parties on the call need to enable port forwarding to optimize skype, or just one party (person)?

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  • How to connect the virtual networks of vmware guests running on different hosts?

    - by gyrolf
    In a test setup, we are running several virtual machines on a single vmware workstation host. All virtual machines are connected via a "host only" network. This runs fine up to 2 or 3 virtual machines (depending on the host hardware). To allow more virtual machines, we want to use more host machines. Details about the environment and applications: Host PCs are running Windows XP in a corporate intranet. VMware used is Workstation 6.5 Guests are running Windows Server 2003 All guests act as Web Servers One of the guests additionally acts as Windows File server, offering shared folders for the other guests to connect to. Restrictions: VMware guests shall not be visible from the intranet. Changes to the host PC are restricted by corporate policy. In the virtual network, no domain controller exists. All virtual machines are member of the same workgroup. Running the virtual network as NAT is possible. Port forwarding might be used if it does not conflict with ports used by the host PC. Looking for a solution, I found hints about using router or vpn software on the hosts, but without any details how to setup. (I found a similar question Sharing the network between 2 VMware hosts, but the answer was not sufficient for me.)

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  • Nokia 5800 v50, getting "Invalid server name" with ad-hoc wlan with Windows 7

    - by Krunal
    After upgrading to v50 firmware in my Nokia 5800 xpress music phone. I am not able to connect to ad-hoc wlan network in my laptop(Windows 7 OS). I have a dialup internet connection and created wireless ad-hoc network to access the internet in my phone. But I am getting "invalid server name" in the phone and my wireless network access type in Windows 7 shows "no internet access". I am able to connect to wlan infrastructure network using 5800 in my office. So my phone is working with wlan and I m able to access internet on it. BUT The problem is "dial up with ICS enabled" and "AD-HOC wlan network" in Windows 7. Can anyone give some solution on it. Or can you provide a guide/tutorial to connect 5800 with adhoc network and dialup internet in Windows 7. System: Windows 7 Dial up internet connection with ICS enabled. Ad-Hoc wireless network with WEP Nokia 5800 Xpress Music phone Note: I have read other posts also and tried their solutions but didn't worked for me. the first solution is to bridge the network and access it. but how can I bridge the dialup and wlan netwok? second solution is manually configure IP and DNS addresses in phone. But what should I add as IP and DNS as my dial up and adhoc network have automatic addresses.

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  • Can't access server on LAN new Router

    - by RMDan
    Earlier this week my roommates decided to change the router we are using for our home network. On the old router I had no problems accessing a laptop running Mint Linux over the network(SSH, FTP, and Shared Folders). However I am now not able to connect. I have verified the IP address of my Linux machine has not changed and I have no problems connecting to our NAS(WDMYCLOUD). The new router is a D-Link DIR-868L. PuTTY is giving me a Timed Out error(was giving me a EHOSTUNREACH before). Running Windows 8.1 the connecting laptop, but tried connecting using my phone via SSH did not work either. More information: Can ping the Linux machine from the router but not my computer. Pinging 192.168.0.111 with 32 bytes of data: Reply from 192.168.0.102: Destination host unreachable. Reply from 192.168.0.102: Destination host unreachable. Reply from 192.168.0.102: Destination host unreachable. Reply from 192.168.0.102: Destination host unreachable. Ping statistics for 192.168.0.111: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

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  • Ping only works after about 30 seconds

    - by Ricardo Polo
    Today I am working on this issue and I would love your ideas. There is a network with something like this LAN 1 -- WAN CHANNEL--- LAN 2 The LAN 1 have two segments. When I make a ping from LAN 1 segment 1 it works like a charm. When I make a ping from LAN 1 segment 2 I have no ping, but after about 30 seconds of continues ping (ping -t) it start to work perfect. After some time of no activity with the destination host the issue happens again. Tracing the route packets stops in the last router before the target. This is the first router in LAN 2 after the WAN channel. In the next screenshot you can see thie issue, the first ping is before a continuos ping and the second one is while continous ping is running. Thank you in advance

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  • How to bridge multiple wireless access points (and internet entry points) into one network

    - by amccormack
    I have two DSL lines coming in to wireless access points and then running to a RV082 Gateway/Bridge. The gateway then runs to a switch, which runs to multiple PCs and a Printer (See picture below). Normally, I would set up the wireless access points behind the gateway, but they are also the modems for the dsl. I have found that I can not print to the network printer if I am connected to the wireless network, but only if I am connected to the wired network. How can I configure the Gateway and APs (Routers) so that the PCs and Printer are all on the same internal network? I have tried turning DHCP off or redirect on the APs and redirect them to the Gateway. However, neither of these worked. Furthermore, I tried pinging the Gateway from the AP but got no response.

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  • Wicd not playing well with networks that utilize network access control

    - by Sion
    Starting a couple months ago (might be able to find exact date if necessary) my installation of Wicd stopped being able to see wireless networks that use NAC (Network Access Control) such as Aruba networks. But if I shut down Wicd and start NetworkManager I can connect to said networks and log in to them depending on what the NAC requires. This is the current wicd package installed: net-misc/wicd-1.7.1_pre20111210-r1 This is how I manipulate the network manager running: su -c'/etc/init.d/wicd stop; /etc/init.d/NetworkManager start' What would cause this specific of a problem to occur?

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  • Problem with Macbook air automatically not acquiring free wifi network dns or router address

    - by Rumsfeld
    I have this problem when my macbook air sometimes does not connect to free wifi hotspots. When the problem happens and I try to run the diagnostics, it normally gets to yellow network settings tab. It seems that it for some reason does not acquire automatically the router or dns address. Sometimes after I shut it down and restart it magically connects to the wifi hotspot but it is very inconsistent. Anyone knows a fix for this problem?

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  • Allow Incoming Responses Apache. On Ubuntu 11.10 - Curl

    - by Daniel Adarve
    I'm trying to get a Curl Response from an outside server, however I noticed I cant neither PING the server in question nor connect to it. I tried disabling the iptables firewall but I had no success. My server is running behind a Cisco Linksys WRTN310N Router with the DD-wrt firmware Installed. In which I already disabled the firewall. Here are my network settings: Ifconfig eth0 Link encap:Ethernet HWaddr 00:26:b9:76:73:6b inet addr:192.168.1.120 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::226:b9ff:fe76:736b/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:49713 errors:0 dropped:0 overruns:0 frame:0 TX packets:30987 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:52829022 (52.8 MB) TX bytes:5438223 (5.4 MB) Interrupt:16 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:341 errors:0 dropped:0 overruns:0 frame:0 TX packets:341 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:27604 (27.6 KB) TX bytes:27604 (27.6 KB) /etc/resolv.conf nameserver 192.168.1.1 /etc/nsswitch.com passwd: compat group: compat shadow: compat hosts: files dns networks: files protocols: db files services: db files ethers: db files rpc: db files netgroup: nis /etc/host.conf order hosts,bind multi on /etc/hosts 127.0.0.1 localhost 127.0.0.1 callcenter # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters /etc/network/interfaces # The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet static address 192.168.1.120 netmask 255.255.255.0 network 192.168.1.1 broadcast 192.168.1.255 gateway 192.168.1.1 The Url to which im trying to get a connection to is https://www.veripayment.com/integration/index.php When I ping it on terminal heres what I get daniel@callcenter:~$ ping https://www.veripayment.com/integration/index.php ping: unknown host https://www.veripayment.com/integration/index.php daniel@callcenter:~$ ping www.veripayment.com PING www.veripayment.com (69.172.200.5) 56(84) bytes of data. --- www.veripayment.com ping statistics --- 2 packets transmitted, 0 received, 100% packet loss, time 1007ms PHP Function in codeigniter public function authorizePayment(){ //--------------------------------------------------- // Authorize a payment //--------------------------------------------------- // Get variables from POST array $post_str = "action=payment&business=" .urlencode($this->input->post('business')) ."&vericode=" .urlencode($this->input->post('vericode')) ."&item_name=" .urlencode($this->input->post('item_name')) ."&item_code=" .urlencode($this->input->post('item_code')) ."&quantity=" .urlencode($this->input->post('quantity')) ."&amount=" .urlencode($this->input->post('amount')) ."&cc_type=" .urlencode($this->input->post('cc_type')) ."&cc_number=" .urlencode($this->input->post('cc_number')) ."&cc_expdate=" .urlencode($this->input->post('cc_expdate_year')).urlencode($this->input->post('cc_expdate_month')) ."&cc_security_code=" .urlencode($this->input->post('cc_security_code')) ."&shipment=" .urlencode($this->input->post('shipment')) ."&first_name=" .urlencode($this->input->post('first_name')) ."&last_name=" .urlencode($this->input->post('last_name')) ."&address=" .urlencode($this->input->post('address')) ."&city=" .urlencode($this->input->post('city')) ."&state_or_province=" .urlencode($this->input->post('state_or_province')) ."&zip_or_postal_code=" .urlencode($this->input->post('zip_or_postal_code')) ."&country=" .urlencode($this->input->post('country')) ."&shipping_address=" .urlencode($this->input->post('shipping_address')) ."&shipping_city=" .urlencode($this->input->post('shipping_city')) ."&shipping_state_or_province=" .urlencode($this->input->post('shipping_state_or_province')) ."&shipping_zip_or_postal_code=".urlencode($this->input->post('shipping_zip_or_postal_code')) ."&shipping_country=" .urlencode($this->input->post('shipping_country')) ."&phone=" .urlencode($this->input->post('phone')) ."&email=" .urlencode($this->input->post('email')) ."&ip_address=" .urlencode($this->input->post('ip_address')) ."&website_unique_id=" .urlencode($this->input->post('website_unique_id')); // Send URL string via CURL $backendUrl = "https://www.veripayment.com/integration/index.php"; $this->curl->create($backendUrl); $this->curl->post($post_str); $return = $this->curl->execute(); $result = array(); // Explode array where blanks are found $resparray = explode(' ', $return); if ($resparray) { // save results into an array foreach ($resparray as $resp) { $keyvalue = explode('=', $resp); if(isset($keyvalue[1])){ $result[$keyvalue[0]] = str_replace('"', '', $keyvalue[1]); } } } return $result; } This gets an empty result array. This function however works well in the previous server where the script was hosted before. No modifications where made whatsoever Thanks in Advance

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  • Joining two routers together, but I have no access to the second router, although I know it's IP address and Gateway

    - by JohnnyVegas
    I have temporarily moved into a rented apartment for 4 months, which has wireless. The trouble I am having is that the access points here are wifi only and no RJ45 and I need to use RJ45 to connect some equipment that I am working with. I have purchased an RT-N66U and installed Tomato (shibby ver. 1.28) and successfully replaced the existing access point, but now I want to enable the access point that I have replaced as it links wirelessly to 3 others. Can I plug in a cable from the access point to my RT-N66U and get it to access the internet via my router? I have no access to the existing wireless access point, and don't want to reset it as it's not mine. There is another router situated in the roof somewhere which I also have no access to, but it's supplying my RT-N66U internet and I most definitely have a double-nat, which although isn't the best way of doing things I am limited with what I can do. Any suggestions on routing tables, vlans etc would be helpful, but I have no experience in these fields before - but I know the tomato firmware can cater for this. My router is set to IP 10.0.1.1 and dhcp is 10.0.1.100-200 The wireless access point address was 192.168.1.2 but this was assigned by the router in the roof which has the address 192.168.1.1. There is a cable from this router going to a wall socket which I now have my RT-N66u attached to via the WAN port. I understand it's scruffy and it isn't the way to do things but I have tried to ask for the admin details but as the wireless network is looked after by a third party and nobody knows their details I am stuck with this dilemma. I could buy three wireless access points and replace the existing but this isn't what I want to do, and although I have installed plenty of DD-WRT wireless repeater bridges they simply don't work here for some unknown reason. The phone line here is very noisy too and I don't have the rights to install ADSL in a building that isn't mine, and 3G coverage isn't good enough either. Thanks for your time

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  • Getting Server 2008 R2 to ignore all traffic from Internet-facing NIC, leaving it to a VM

    - by Wolvenmoon
    I got in to Server 2008 R2 via Dreamspark and would like to start learning on it. I don't have much option but to put it on a system sitting between the Internet and my home LAN due to electricity bills and the fact that 3 computers in an 11x11 space in 102 degree weather is pretty stygian. Currently I use a ClearOS gateway to manage everything, what I'd like to do is take my server 2008 R2 box, which has two NICs, and drop it at the head of my network. I'd want Server 2008 R2 to ignore all traffic on the external facing NIC and pass it to a virtual ClearOS gateway, and to put all its Internet traffic through its other NIC - which will face the rest of my network and be the default gateway for it. The theory is to keep the potentially vulnerable Server 2008 R2 install as tucked behind a Linux box as possible, without sacrificing too much performance. This is a home network that occasionally hosts dedicated game servers and voice chat servers, so most malicious activity is in the form of drive by non-targeted attacks, however, I don't trust Windows Server because I don't know the OS well enough, yet. So, three questions: How do I do this, am I going to be reasonably more secure doing this than if I just let the Server 2008 R2 rig handle all the network traffic and DHCP (not an option), and should I virtualize the Server 2008 R2 rig instead and if so in what? (Core 2 Duo e6600 w/ 5 gigs usable RAM)

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  • Route packets from one VPN to another

    - by Mike
    I have two OpenVPN servers (10.8.0.0 and 10.9.0.0) set up on my OpenSUSE server. Within one network, each computer is visible to any other one, but I'd like to make it so that computers are visible across networks. I'd like to route the packets like this: when a user (say 10.8.0.6) pings an address on the other VPN (10.9.0.6), the packets are routed to the 10.9.0.1 and then to the appropriate computer in this VPN. How do I achieve this using iptables or a different tool? I tried the commands at the end of this section with no avail.

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  • Routing internet through ethernet to a computer without a Wireless adapter

    - by Decency
    I'm setting up a small home network. I have a laptop which connects to internet wirelessly- that works fine. I have a desktop connected to this laptop by an ethernet cable which I'd like to access the internet with. In the past, I have used a different laptop to do this and had no problems doing so. Both computers run Windows 7. I have tried setting up a homegroup and disabling Windows firewall, as well as restarting both computers. I can share data but my internet connection can not be accessed through the desktop. (I understand USB network adapters are cheap, I have one on the way but that doesn't solve this issue.) Any help or live chat support if you'd prefer would be appreciated. Thanks!

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  • Windows XP Network installation from Linux server ( RHEL 5)

    - by Kumar P
    How can i make network installation ( for install Windows XP ) from Linux ( RHEL 5 Server ) ? There is option in linux server to install client machine with linux by network installation. As same as windows server have option to install client machine with windows operating system. Now i want to know steps for linux server (RHEL5) to install client machine with windows operating system (Windows XP) *sorry for poor english

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  • Need help creating advanced context menu command in Windows 7 (x64)

    - by Craig
    I found out about ForceBindIP and I really love it, so much that I am using it regularly enough to where spamming the same command prompt over and over again is getting painful. Here's ForceBindIP and what it does: http://www.r1ch.net/stuff/forcebindip/ I'm on a 64-bit of Windows 7 Home Premium. What I want to do is add a right-click context menu item so that when I browse items in Windows Explorer, or on my desktop, I can automate a ForceBindIP command (through the prompt). I am permanently connected to two networks: one over ethernet, and one over wireless. My ethernet network takes priority. What I want to do is add a "Run through wireless network" context menu item, that will send the item through this command: ForceBindIP {5F657824-9E3B-46E5-C21E-F52585R6457E} "[path to right-clicked file here]" It will need to run that command in C:\Windows\SysWOW64. I've no experience at all playing with the Windows registry or writing batch files, anything of that sort. I was wondering if anyone here would be kind enough to assist me?

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  • Internet Sharing via router

    - by mak4pi
    Question: How to setup Internet Sharing among two computers (one Mac 10.5.6, one Ubuntu 9.10) via a router? Situation: The Mac is using AirPort (wireless interface) to connect to router as 192.168.1.101. The Ubuntu is using an ethernet cable to connect to router as 192.168.1.104. Visual: Mac )))))) Router ======= Ubuntu Any ideas are greatly appreciated. Thanks.

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  • IP alias lost when changing main IP

    - by rmflow
    my /etc/network/interfaces: auto eth0 iface eth0 inet static address 192.168.3.75 netmask 255.255.255.0 gateway 192.168.3.0 Situation 1: After linux booted I set an IP alias: ifconfig eth0:0 192.168.3.111 Now ifconfig reports two IP addresses 192.168.3.75 at eth0 and 192.168.3.111 at eth0:0 When I change main IP to another network: ifconfig eth0 192.168.1.111 the alias eth0:0 is lost! Situation 2: After linux booted I set an IP alias: ifconfig eth0:0 192.168.4.111 Now ifconfig reports two IP addresses 192.168.3.75 at eth0 and 192.168.4.111 at eth0:0 When I change main IP to another network: ifconfig eth0 192.168.1.111 the alias eth0:0 stays! How do I properly change main IP, so all my aliases are not lost?

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  • Default route not on LAN

    - by jarmund
    I have a network that in principle looks like this: H1---\ /----Inet1 H2---->---GW1---< H3---/ \----GW2-----Inet2 H1 and H2 = Hosts that need access to internet with GW1 Inet1 = Internet link over 3G connection Inet2 = 5GHz link to Internet (not always up) GW1 = Works as a router, automatically picking the "best" connection between Inet1 and Inet2 (the latter via GW2). GW2 = 5GHz wifi router And here's the problem: H3 only needs internet access when Inet2 is up. What i was thinking of doing was a routing table that looks like this: route to GW2 via GW1 default route is via GW2 I first set the route to GW2 via GW1 without a problem. But when i try route add default gw 1.2.3.4 (1.2.3.4 being the IP of GW2), it complains "SIOCADDRT: No such device" Is the problem that the default gw i'm trying to set is not reachable directly? Is there a different approach that would allow me to achieve this? An alternative (and hypothetical) approach: Since H3 will be using a static IP, is it possible to do some magic with iptables on GW1 to forward any packets from H3 to GW3, thereby "tricking" H3 into using GW2 as its default router?

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  • connect server to server on secondary NIC

    - by microchasm
    Hi, I have a CentOS box with multiple NIC's running Apache. I also have another box running RHEL that will be the MySQL server. I'm trying to use the secondary NIC on the Apache box to connect directly to the MySQL server, but so far no luck. I want to isolate the MySQL box as much as possible which is why I'm going for a direct connection as opposed to running through a switch. I have a crossover cable running between them. IP configs: Apache box eth0 [to lan] ip addr: 192.168.200.100 netmask: 255.255.0.0 gateway: 192.168.111.1 eth1 [to mysql] ip addr: 192.168.200.101 netmask: 255.255.0.0 gateway: [blank] MySQL box eth0 [to apache] ip addr: 192.168.200.203 netmask: 255.255.0.0 gateway: 192.168.200.201 The rest of our network is on 192.168.111.0/24 subnet. Ping only returns Destination Host Unreachable. I've tried various variations of this setup (including straight through cable), and I can't seem to get them to talk to each other. Any help appreciated.

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