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• Virtual firewall to protect hypervisor

  - by manutenfruits

  I am running an Ubuntu Server 12.10 as a single host connected to a NATed router connected using PPPoE to a optical fiber modem. This server is meant to be accessed from the Internet, but also to be used from the LAN as a SVN, MySQL and what not... The issue is that the router is not customizable enough to serve, so I was thinking about creating a virtual pfSense firewall using KVM inside of the server itself, removing the need of the router. Is this possible? Can the host ignore and block all traffic coming to itself, but not for the firewall? I am aware this is not the most desirable environment, I accept suggestions based on budget!

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• How to stop ethernet interface in bridge configuration from obtaining IP address via DHCP

  - by user71061

  Hi! I'm trying to configure openvpn in bridging configuration. First step of doing this requires creating bridge interface (br0), bridging together physical ethernet interface (eth0) and logical tap0 interface. This can be done with simple script but I want to use less popular approach, configuring bridge interface entirely via /etc/network/interfaces file (on Debian linux). So I have removed all eth0 definitions form /etc/network/interfaces and replaced if with following br0 definition: auto br0 iface br0 inet static pre-up openvpn --mktun --dev tap0 address 10.0.0.1 netmask 255.255.255.0 bridge_ports eth0 tap0 post-down openvpn --rmtun --dev tap0 This works as I expected, but there is only one problem: interface eth0 is part of bridge interface br0 AND it also receive it's own IP address from my DHCP server (located on same LAN where eth0 is connected). My questions is: how to stop eth0 interface from obtaining it's own IP address? (It should only be part of br0 bridge).

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• VoIP on Netgear DGN 2000 and Lynksys PAP2

  - by David Brown

  I have a VoIP service running perfectly for outgoing calls but I cannot receive incoming calls. I have a Netgear DGN 2000 modem router on 192.168.0.1 and a Lynksys Phone Adapter PAP2 on 192.168.0.2. I have created 3 new custom services: Service Table Service Name Ports tlenfon(TCP) 5060 tlenfon2(UDP) 15000 tlenfon3(UDP) 35000 I have reserved the address 192.168.0.2 for the PAP 2 I have forwarded the ports for each service to the PAP2 Service Name Action LAN Server IP address WAN Users Log tlenfon ALLOW always 192.168.0.2 Any Always tlenfon2 ALLOW always 192.168.0.2 Any Always tlenfon3 ALLOW always 192.168.0.2 Any Always I have checked the Default DMZ and specified 192.168.0.2 What have I missed?

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• Internet access only works after turning off and on the local connection

  - by AgentFire

  Every time I turn on the computer, it has no internet access. The network card is connected to a router which broadcasts the internet all over the office LAN. Once I turn off and then on the local connection (or network card), the internet access works. Rebooting and logging out/in again does not help. Only the turning off and on the network card gives me internet access. Why is that? How do I fix it?

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• IE 8 doesn't appear to clear cache on demand. Is anyone else seeing this?

  - by Steve

  I have a client that uploads updated pdf files to her Concrete5 CMS, through the file manager, replacing the old file with the same name. She then does a cms "clear cache" and exits as she should. Then, in testing, she finds that the old file still comes up when clicking on the link. On further review, the cms file manager version tracking shows that the file has been updated, and, for me, the new file comes up, as it should, when clicking the link. My client hase also refreshed her browser cache and still, she only gets the old file when clicking on the link. She says that, while she can't seem to force an immediate cache update, overnight it appears to update. My client is also part of a large company-wide lan and intranet. Is it possible that there is a cache function placed outside of her local browser and cms cache that is not updating?

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• Detect an IP address of a Wireless Access Point device

  - by dempap

  I have a Wireless Access Point device (http://www.szedup.com/show.aspx?id=1706), which I am planning to put into BeagleBoard-xM, in order to achieve wireless communication (LAN). However, I can't find it's IP address. I mean, I have to know it's IP address in order to connect with BeagleBoard-xM via a terminal emulator. For the moment, I have this device connected via Ethernet on my router. My router's setting page shows I have this device connected, but no further information. Is there any way to find the IP address of the Wireless Access Point? I hope of being understood. Any help would be really appreciated.

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• How to set the IP address in a customized OpenWRT compilation

  - by Berdus

  I have been struggling today customizing OpenWRT. I checkout the stable using SVN, "make menuconfig" to customize the image, "make" it and run it on a router. Almost all my modifications work, except for the (Seemingly trivial) task of changing the default 192.168.1.1 address. I tried numerous files (scripts as well as config files) but I can't seem to change it (I can change it for a brief moment after boot using the "preinit" file, but after a few seconds it reverts to default). I suspect I should be setting it in the /etc/network file, but modifications there seem to be overwritten during boot. Maybe it has something to do with the br-lan interface? Does anybody have some thoughts on the subject? Thanks!

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• LinkSys WRT54GL + AM200 in half-bridge mode - UK setup guide recommendations?

  - by Peter Mounce

  I am basically looking for a good guide on how to set up my home network with this set of hardware. I need: Dynamic DNS Firewall + port-forwarding VPN Wake-on-LAN from outside firewall VOIP would be nice QoS would be nice (make torrents take lower priority to other services when those other services are happening) DHCP Wireless + WPA2 security Ability to play multiplayer computer games I am not a networking or computing neophyte, but the last time I messed with network gear was a few years ago, so am needing to dust off knowledge I kinda half have. I have read that I should be wanting to set up the AM200 in half-bridge mode, so that the WRT54GL gets the WAN IP - this sounds like a good idea, but I'd still like to be advised. I have read that the dd-wrt firmware will meet my needs (though I gather I'll need the vpn-specific build, which appears to preclude supporting VOIP), but I'm not wedded to using it. I live in the UK and my ISP supplies me with: a block of 8 static IPs, of which 5 are usable to me a PPPoA ADSL2+ connection

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• LinkSys WRT54GL + AM200 in half-bridge mode - UK setup guide recommendations?

  - by Peter Mounce

  Crossposted from here I am basically looking for a good guide on how to set up my home network with this set of hardware. I need: Dynamic DNS Firewall + port-forwarding VPN Wake-on-LAN from outside firewall VOIP would be nice QoS would be nice (make torrents take lower priority to other services when those other services are happening) DHCP Wireless + WPA2 security Ability to play multiplayer computer games I am not a networking or computing neophyte, but the last time I messed with network gear was a few years ago, so am needing to dust off knowledge I kinda half have. I have read that I should be wanting to set up the AM200 in half-bridge mode, so that the WRT54GL gets the WAN IP - this sounds like a good idea, but I'd still like to be advised. I have read that the dd-wrt firmware will meet my needs (though I gather I'll need the vpn-specific build, which appears to preclude supporting VOIP), but I'm not wedded to using it. I live in the UK and my ISP supplies me with: a block of 8 static IPs, of which 5 are usable to me a PPPoA ADSL2+ connection

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• TightVNC (or any VNC) client windows scaling

  - by mr.b

  Hi, I am currently using TightVNC to connect to multiple remote hosts in LAN. I start 16 VNC instances, set Scaling by: Auto (in connection options display), set Hextile encoding, and then select all windows and use Tile Horizontally, which covers my entire screen with VNC screens. It all works sort of nice, except that desktop interaction is really slow when there are more then 4 VNC clients. My question is, does VNC client (not just TightVNC, but any compatible client) support some kind of smart scaling option, so that client tells server something along the lines of: "Okay, I'm displaying your entire screen in a window size 300x225 px, so can you please start sending encoded images on that resolution?", at which point interactiveness of open connections dramatically increase, and when I decide to go full screen on some connection, client and server re-negotiate and server starts sending full resolution images again? Thanks!!

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• How do I connect my Samsung 6 Series TV to network through a proxy?

  - by JGC

  I have a Samsung 6 series LCD TV which can connect to internet by LAN. When I connect my TV to my Windows 7 laptop which get its internet from AS share it, it can connect to the Internet. My TV can connect to YouTube, but in my country this site is filtered. I want to use an antifilter(proxy) program to bypass the filtering. The problem is the TV does not recognize the proxy port or program. How can I configure the TV or the network to use the proxy?

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• Setting up dual wireless routers

  - by JasCav

  I have two wireless routers (one is the router supplied by Verizon - MI424-WR ActionTek and the other is DD-WRT Buffalo router). I want to set them up so that I have the second router (Buffalo) on its own subnet and two SSIDs so I can put different devices on different routers and so I can put my web server on the first router and put most of my other computers behind the second router for a little extra protection in case of a compromise. From my understanding, I have to hook the two routers together so that the LAN from the Verizon router plugs into the WAN port of the Buffalo router. This is where I get stuck. What settings do I need to look for to setup the Buffalo on its own subnet? Do I need to do anything with the Verizon router, or are the configuration changes done to the Buffalo?

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• Find computer names on a private network (with nmap?)

  - by paracaudex

  On a LAN, I want to find out the names of all the connected computers using a cross-platform program, preferably nmap. I know I can do nmap -sn xxx.xxx.xxx.xxx/24 (where xxx.xxx.xxx.xxx is a local IP address) to find hosts which are up, but how do I find the computers' hostnames? Do they broadcast this in a way that I can find using nmap? UPDATE: It looks like Angry IP Scanner can do this. How does it do this? Can I replicate it with nmap?

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• Accessing localhost via IIS 7.5 on Windows 7 very slow

  - by Ian Devlin

  (I've asked this over on stackoverflow already, but thought I'd ask here as well) I'm currently running an ASP.NET application on IIS 7.5 on Windows 7. When I access this application on Internet Explorer (either 6, 7 or 8) it is incredible slow and often fails to load at all. There are messages at the bottom saying: Waiting for http://localhost/....... or sometimes waiting for about:blank (I've read that this can be a virus, but I've run all the usual checks and it's not). constantly, but it returns with the usual: "Internet Explorer cannot display the webpage" I've also tried this by using 127.0.0.1 and the machine name, with the same results. I've tried the same application on the latest Firefox, Safari, Chrome and Opera and they all work fine. I've also installed the same application on a Windows Server 2003 machine, and it all works fine via Internet Explorer. I've also turned off the IPv6 setting on the LAN connection. Soes anyone have any ideas why this doesn't work with Internet Explorer and yet does with other browsers?

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• Mac OS X: pushing all traffic through a VMWare VM

  - by bj99

  I want to set up an Astaro (Sophos) UTM in a Virtual Machine. The Setup should be at the end the following: Cable Modem (one IP adress) | [Ethernet] Sophos UTM (running as VM [VMWare Fusion 5] on the MacMini) | [WIFI] Airport Express v2 (for sharing Local Network to wireless and wired clients) 1)| [WIFI] 2)| [Ethernet over Thunderbolt Ethernet Adapter]* Clients MacMini (Local File Server) *To have the Mini also protected behind the UTM So the setup process for the UTM works fine, but then the problems start: I just have one external IP (from my cable modem provider)== So if I put the VM in briged mode my Internet connection drops, because the MacMini also has its IP adress. If I put the VM to NAT mode the Mini itself is not protected by the UTM So: is there a way to hide the en0 interface(Ethernet) and the en1 interface (Wifi) from the MacMini, so that they not even appear in System Preferences Network section but are available to the VM? That way the Mini must connect to the en2 interface (Thunderbolt adapter) to make any Internet/LAN connection and I just use the given single IP from the Cable Modem. Thaks for any suggestions... Sebastian

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• how to separate a network for traffic

  - by Student_CVO

  At the moment our all computers in one big LAN, it is the intention to separate the admin and edu (it's in a school) especially for traffic and less for security. How do this best? I have a drawing, but can't post it (a can send it in a mail) Firewall?, VLAN?, IPCop (no two green zones)?, pfsense? ... Should there be two scopes on the dhcp server (WIN 2008 R2), one for admin and one for edu or is one scope enough? I would like your advice, I am a student in training with this task as a project. Thanks

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• BGP Router reccomendations for simple redundancy [closed]

  - by Jona

  We have two sites that each have an internet connection and have a dedicated dark fibre between them. Each site has it's own IP space and we have an AS number. We're looking to be resilient to failure of the internet connection to either site and so need to buy a pair of approriate routers. Requirements are: Able to run 2 bgp sessions (one with the ISP, one with the other site router) Option to take a full table from the upstream ISPs would be nice. Able to provide HA gateways on the LAN side (e.g. 192.168.0.254 will automatically migrate if it's host router lost power) A dedicated device rather than a server running Linux / BSD Not crazy expensive. Any help / advice much appreciated.

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• Windows XP does not list WPA wireless networks

  - by Tomalak

  What can be the reason that Windows XP does not show WPA-encrypted wireless networks? The laptop I have problems with is an older model (Toshiba Satellite Pro 6100) with Windows XP SP3 on it, fresh install. The wireless network card in it is an Agere product that lists as "Toshiba Wireless LAN Mini PCI Card". The networks showed up perfectly before I first tried to connect to one (it was set to WPA2). The connection failed (the card supports WPA only), then something must have happend and Windows hides these networks now. A manually configured WPA setup via Windows' own wizard works, I'm using it right now. The network just won't show up in the list of available network on its own. I suspect that XP incorrectly set a flag somewhere that this network card does not support WPA. Is there such a flag, and if so, how can I change it back?

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• Access 2 sites on same machine behind a router

  - by Luc

  Hello, I have several machines on my lan. On of them is running 2 web sites, first_web_site and second_web_site (each one in a dedicated NameVirtualHost). Another machine is running another site third_web_site. I would like to be able to access each one, within internet, with the url: first_web_site.domain.tld second_web_site.domain.tld third_web_site.domain.tld knowing that 2 sites are on the same machine. Can Apache help me to do this ? I have a machine that will have a apache server to be used for proxy purposes. I was talk to set up virtualhost on this one and use proxy server but I do not know how to do this. Could you please give me hints ? Thanks a lot, Luc

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• bind: blackhole for invalid recursive queries?

  - by Udo G

  I have a name server that's publicly accessible since it is the authoritative name server for a couple of domains. Currently the server is flooded with faked type ANY requests for isc.org, ripe.net and similar (that's a known distributed DoS attack). The server runs BIND and has allow-recursion set to my LAN so that these requests are rejected. In such cases the server responds just with authority and additional sections referring the root servers. Can I configure BIND so that it completely ignores these requests, without sending a response at all?

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• Waht are the best proxy servers for Mikrotik router?

  - by niren

  I want to setup proxy server for my Mikrotik router. There is inbuilt web-proxy for Mikrotik router but I can extend this upto transparent proxy(kind of proxy server) only. We need High anonymity proxy so that we can hide our LAN static IPs(we don't have private IP) from outside Intruder/hackers. And also I know I can setup NAT rule to hide our IP(only private IP not public/static IP) as per this link, but I cann't hide static/public IP. Essentially I want to hide our Public/Static IP (there is static/public IP for all systems in our company) from outside Internet. To achieve this I guess I need other software apart from Mikrotik router gateway setup. can anyone suggest me Is there any other software to achieve my requirement? I know about squid proxy but am not sure whether It can hide our static/public IP. Note: we have assigned public/Static IP to all systems of our company since we have rights to access our company's system from anywhere by dedicated laptop(given by our company with more security) through VPN connection.

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• How to prevent Windows Home server waking for backup

  - by Andronicus

  Since changing the motherboard in my Windows home server it has been switching itself on every night to perform a scheduled backup. I don't want this to happen though, I want to switch the server on using Wake on lan, but I want to manually perform backups if/when required. I know I can disable backups of each computer, and the machine wont turn on, but I want to allow manually triggered backups, or automatic backups if the homeserver is on, but if its in sleep mode, I wish it to stay in that state unless I wake it. How can this be achieved?

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• diagnostic software for wifi adapter

  - by Nathan Fellman

  I'm having trouble with my wifi connection. Is there any software out there that can help me determine if the problem is in the drivers or in the hardware? Regretfully, I'm working on Vista Edit: The problem I'm having is that the Vista reports that the wireless radio is connected, shows an IP and all, the router also shows that the computer is connected, but there's no connectivity. I can't logon to the router, and I can't even ping it. When I ping it I get the response: General Failure I have tried connecting with and without various wireless security protocols. I have tried disabling the wireless adapter and re-enabling it from the Device Manager I have tried updating the driver None of this has helped. When I connect via Ethernet (with a cable, that is), everything works fine. Edit: I'm not using any firewall on the computer, that I'm aware of. The IP address for the WIFI adapter is similar to the one for the LAN adapter. They differ by one.

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• Broken web interface in WRT54G router

  - by asmo

  I flashed my WRT54G (v3) from a custom firmware to the lastest Linksys one (v4.21.1) Now the internet/LAN works fine, but the web interface (http://192.168.1.1/) shows broken pages. I tried to manually navigating to the firmware upgrade page (by entering its URL), but it is broken too and not working. I tried a 30/30/30 reset twice, but the broken web interface still shows up. I tried to flash using the tftp2.exe application, which told me that the router didn't respond to the request. I tried to flash using the Windows commandline TFTP protocol, but I don't know how to supply a password on this prococol. (there is a factory default password ("admin") which I can't remove since the web interface is broken)

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• isolate web servers on intranet with dfl-800

  - by microchasm

  I administer a small network (10 users). I'm getting ready to deploy a internal webapp that will be hosted and accessed locally only. There are about 10 users on the network (192.168.111.0/24), a win2k3 server, apache (RHEL), and Mysql (RHEL), and various miscellaneous peripheries. I'd like to isolate the apache and sql boxes into a seperate area of the lan to keep things easier to maintain/grow. I've been reading about vlans, subnets, etc.. I'm not clear, however, which would be the best solution for our setup. Thanks for any tips and or advice.

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