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• Automatically install driver on headless WHSv1 system

  - by Dan Neely

  I have one of the HP Mediasmart Windows Home Server v1 boxes. It's network port appears to have died a few days ago but the system is not giving any other sign of failure: No activity lights activate on either side of the cable when connected to my gigabit switch; when connected to one of my routers 100 megabit ports the lights turn on but it remains unreachable over the network and my router never lists it as among DHCP clients. I bought a USB-ethernet adapter to temporarily get it back online; but the adapter needs a driver to work which I can't install because the system is headless by design (no video out, no PCI/PCIe slots) with admin access only available via the WHS client or remote desktop. Both of those options require network connectivity and are consequently unavailable. I tried copying the drivers to a flash drive; but Windows either didn't look there or none of the drivers provided were suitable (Win8, Win7, or combined XP and Vista). I've been told that a USB WiFi adapter would have the same driver problem.

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

  - by nopsax

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

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• Easy solution to monitoring & blocking connections to non-malicious services, IP's, and tracking companies

  - by binarybunny

  Our family lives in the middle of nowhere, so the only high-speed internet available is Verizon's 3G mobile broadband. We have the highest package available, yet continually go over the 10GB limit and get charged $10 every 1GB we go over. We run a business from home, so stopping when we hit the limit is not an option. I've found the majority of connections are to Google, Microsoft, Akamai, Facebook, and other web service companies (mainly google). I know these are harmless connections, but when it costs money for them to monitor our web activity it becomes a serious problem. Here's some things I've done, but I'm sure there's something else that could help before blocking a huge set of IP ranges: stopped using windows (on my machine) use MVPS host file on all computers use firefox on all computers (with don't track me option) ad block plugin on all browsers blocking google updates blocking windows updates block images in browsers (when possible) use comodo (paranoia-level style of blocking..) virus-free computers with ESET NOD32 bought router and installed dd-wrt in attempt to block connections more diligently (and throttle bandwidth if it comes to that) Anything I'm missing? I know Google analytics is on almost all websites, as well as FB like buttons but I would like to be able to stop these connections without blocking use of google services like gmail, etc. Any ideas?

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• Parental Controls in Ubuntu - per user

  - by Hamish Downer

  I would like to set up parental controls on Ubuntu for a friend of mine. I want it so that the child user has the controls set, but the parent user is not restricted. To be clear, they are sharing one computer, so a router based solution won't help. And I would like a set of step by step instructions to do this. Just one way of doing it. I'm an experienced Ubuntu user, happy at the command line. I've spent quite some time googling for this along the way. I hope that the GChildCare project will eventually make this easy, but it is not ready yet. In the meantime, the WebContentControl GUI provides a way of managing parental controls, but apply them to every user on the computer (easy WebContentContol install instructions and detailed instructions, discussion and related links on ubuntuforums). The ubuntuforums post has a FAQ that states that user-specific configuration is not possible with WebContentControl, and then provides 3 links he used to help him do it. But they are far from step by step instructions. There is this thread which is notes along the way and linking to this article about squid and dansguardian. And then to these two dansguardian articles which are somewhat in depth ... So does anyone know of an existing guide to how to set up parental controls on ubuntu with some users not affected? If no one has come up with an answer after a little bit, I'll set up a community wiki answer so we can come up with a guide.

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• How does IPv6 subnetting work and how does it differ from IPv4 subnetting?

  - by Michael Hampton

  This is a Canonical Question about IPv6 Subnetting. Related: How does IPv4 Subnetting Work? I know a lot about IPv4 Subnetting, and as I prepare to (deploy|work on) an IPv6 network I need to know how much of this knowledge is transferable and what I still need to learn. IPv6 seems at first glance to be much more complex than IPv4. So I would like to know: IPv6 is 128 bits, so why is /64 the smallest recommended subnet for hosts? Related to this: Why is it recommended to use /127 for point to point links between routers, and why was it recommended against in the past? Should I change existing router links to use /127? Why would virtual machines be provisioned with subnets smaller than /64? Are there other situations in which I would use a subnet smaller than /64? Can I map directly from IPv4 subnets to IPv6 subnets? My interfaces have several IPv6 addresses. Must the subnet be the same for all of them? Why do I sometimes see a % rather than a / in an IPv6 address and what does it mean? Am I wasting too many subnets? Aren't we just going to run out again? In what other major ways is IPv6 subnetting different from IPv4 subnetting?

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• iRedMail home setup - use different SMTP relay for different destination domains

  - by John

  Hello helpful server folks, I'm messing with iRedMail. I've mostly been successful, I think I have an SMTP problem. I have changed RoundCube (webmail) to use BrightHouse's, my ISP's, SMTP server for outgoing. It works fine, I click send and poof, I have gmail. I can reply from gmail to my email server, and it works. It took 10 hours for the email to show up, which is a different problem, I think, but it does work. But when I send from my server TO my own server, my ISP's Postmaster account sends me a cryptic blurb. I just got off the phone with them, and they say it "should work", and that they can't reach my pop3 server. (pop3, pop3s, imap, and imaps are all open on my router and forwarded to the server, I'm not sure what I need, I'm just covering my bases...) pop3 and/or imap as external interfaces are just formalities, I really just want webmail to work. Roundcube only takes one SMTP server in its configs. How can I configure Postfix to relay / forward emails to my ISP's SMTP, while taking messages bound for my own domain and processing them? Since my ISP won't let me "bounce" my emails off of it. Maybe I'm vastly misunderstanding how e-mail works in general: To receive mail, I should only need port 25, SMTP, open to the internet, correct? Should I be concerned about some authentication failure from the outside to my relay? (My relay requires user/pass to use, my ISP's requires none.)

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• iptables port forwarding works only for localhost

  - by Venki

  Below is my iptables config. I used this for my accessing a node js website running in port 9000 through port 80. This works fine only if access the website through local host / loop back. When I try to use the ip of eth0, which is assigned by my router through dcp. this does not work, when I use ip like 192.168.0.103 to access the website. I am not able to figure what is wrong here, Already burnt a day in this, still not able to figure out :( Edit: ( more information) Earlier, I was using this configuration to develop the website, i had configured the domain name to point to 127.0.0.1 in the /etc/hosts file. It was working fine, but now I am trying to deploy the website in a vps with static ip, This configuration does not work with both static IP. # redirect port 80 to port 9000 *nat :PREROUTING ACCEPT [57:3896] :INPUT ACCEPT [0:0] :OUTPUT ACCEPT [4229:289686] :POSTROUTING ACCEPT [4239:290286] -A PREROUTING -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 9000 -A OUTPUT -d 127.0.0.1/32 -p tcp -m tcp --dport 80 -j REDIRECT --to-ports 9000 COMMIT # Allow HTTP and HTTPS connections from anywhere (the normal ports for websites and SSL). -A INPUT -p tcp --dport 80 -j ACCEPT -A INPUT -p tcp --dport 443 -j ACCEPT -A INPUT -p tcp --dport 9000 -j ACCEPT -A INPUT -j REJECT

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• Remote Desktop access Windows 7 system from Windows 8

  - by Prabhat

  I have 2 systems; Windows 7 & Windows 8. Both are connected to WiFi router. They have been assigned address 192.168.2.8 & 192.168.2.9 respectively. I have added them to home group. I am able to ping and connect Windows 8 system from Windows 7. I am having trouble connecting Windows 7 system from Windows 8 system. I can't even ping Windows 7 system. Windows 7 system's user is administrator (default administrator account from secpol.msc). File sharing, Remote Access, network discovery are all enabled. Someone please help me connect. EDIT : I found that this is the issue of Kaspersky Internet Security 2012. If I disable firewall, it works. I tried opening port 3389 in Kaspersky. It is still blocking access.

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• exim4 redirect mail sent to *@domain1.example.com to *@domain2.example.com

  - by nightcoder

  Current situation: We have a VPS that hosts a website example.org. Exim is configured to work as a smarthost. All emails sent through exim are successfully relayed to another mail server (that is working on example.com). Goal: To forward mail sent to *@example.org to *@example.com, i.e. change the recipient's address from *@example.org to *@example.com. Problem: If I send email to address *@example.org, then it seems exim doesn't change the address, it still relays the message to another mail server but recipient is still *@example.org. Maybe the redirect is not applied for some reason. Configuration and logs: /etc/exim4/update-exim4.conf.conf: dc_eximconfig_configtype='smarthost' dc_other_hostnames='' dc_local_interfaces='' dc_readhost='example.org' dc_relay_domains='example.org' dc_minimaldns='false' dc_relay_nets='0.0.0.0/32' dc_smarthost='example.com::26' CFILEMODE='644' dc_use_split_config='false' dc_hide_mailname='true' dc_mailname_in_oh='true' dc_localdelivery='maildir_home' /etc/exim4/conf.d/router/999_exim4-config_redirect (created by me): domain_redirect: debug_print = "R: forward for $local_part@$domain" driver = redirect domains = example.org data = [email protected] (for now data is set to a specific address for simplicity and testing) exim log when sending email to [email protected] (should be redirected to [email protected]): 2012-03-20 19:40:07 1SA4ud-0005Dw-7k <= [email protected] U=www-data P=local S=657 2012-03-20 19:40:08 1SA4ud-0005Dw-7k => [email protected] R=smarthost T=remote_smtp_smarthost H=domain2.com [184.172.146.66] X=TLS1.0:RSA_AES_256_CBC_SHA1:32 DN="C=US,2.5.4.17=#13053737303932,ST=TX,L=Houston,STREET=Suite 400,STREET=11251 Northwest Freeway,O=HostGator.com,OU=HostGator.com,OU=Comodo PremiumSSL Wildcard,CN=*.hostgator.com" 2012-03-20 19:40:08 1SA4ud-0005Dw-7k Completed So, the address is not changed :( Please help! I'm trying to make it work for half a day already :(

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• IPTables: NAT multiple IPs to one public IP

  - by Kaemmelot

  I'm looking for a way how to nat 2 or more inner IPs (in my case xen doms) to one outer IP. I tried to use iptables -t nat -A PREROUTING -d 123.123.123.123 -j DNAT --to 1.2.3.4 --to 1.2.3.7 iptables -t nat -A POSTROUTING -s 1.2.3.4 -j SNAT --to 123.123.123.123 iptables -t nat -A POSTROUTING -s 1.2.3.7 -j SNAT --to 123.123.123.123 And got an error: iptables v1.4.14: DNAT: Multiple --to-destination not supported Try `iptables -h' or 'iptables --help' for more information. I found this in the manpage: Later Kernels (= 2.6.11-rc1) don't have the ability to NAT to multiple ranges anymore. So my question is: Why is it not possible anymore and is there a workaround? Maybe I should use an other method I don't know yet? EDIT: The idea is to use the system like a router, so I have one address but multiple users behind. The problem is I don't know which connection reffers to a user (for example 1.2.3.4). But I know, they all have different ports open for incomming traffic. So my solution (for DNAT) would be to nat all incoming connections to all users and filter all unused ports, so the connection goes to one single user. For outgoing traffic I would use iptables -A FORWARD -i eth0 -d 1.2.3.4 -m state --state ESTABLISHED,RELATED -j ACCEPT

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• Windows Server 2008 R2 DNS - One IP, multiple servers

  - by Blu Dragon

  I need opinions and examples on how to best to accomplish the setup I am looking for. I have a public-facing AD domain server with one public IP address. I have setup an external zone for example.com and I successfully have my own name servers pointing to it at ns0.example.com and ns1.example.com. I also have an internal zone for my private network at home.example.com. I am behind a router with the domain server in the DMZ. I want dev.example.com to be accessible from the outside world over https and to point to internal IP address 192.168.1.78. Likewise, I want www.example.com to be accessible from the outside world and point to internal IP address 192.168.1.79. Both dev and www servers are CentOS 5.6 VMs running inside of Hyper-V on the domain server (bad idea I know but I am limited on hardware atm). What is best way to achieve this? From what I have read and researched on Google, I may need to setup a reverse proxy but I am not sure how well that will work with SSL.

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• BGP path prepended route not listed anywhere

  - by Julien Vehent

  We have a simple multi-homed setup with two routers that advertise our AS to two ISP. The second ISP (ISP B) is only used for backup when ISP A goes down, so we prepended our AS 3 times on this route. I spend a couple of hours this morning poking at looking glass routers all over the internet, and none of them list our backup route with the prepended path. I checked the south african internet exchange, the london internet exchange, oregon internet exchange and a couple dozen ISPs. All of them have multiples routes through ISP A, often with 3 or 4 hops. The route through ISP B should, at least, appear somewhere and have 5 or 6 hops. But I couldn't find it anywhere. (I checked the full bgp tables on the looking glass routers, using show ip bgp 65000) My questions are: Is there a limit to the size of a route after which most routers will simply discard the route ? Is our backup route even going to work when ISP A goes down, if no router knows about it ? Our two routers are connected on iBGP. Would it be possible that the route through ISPB is not announced because the iBGP session prefers the route through ISPA ? This is what non-exist-map and advertise-map are supposed to do, but none of those are used in either routers.

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• Rapidly changing public IP addresses on certain networks?

  - by zenblender

  I run/develop an online game where many of our users are in southeast asia. I recently went to southeast asia and made an alarming discovery. Anywhere I got internet access, whether it was via 3G, a LAN in a hotel, or wifi in a cafe, both in Singapore and the Philippines, I noticed that my IP address was changing CONSTANTLY. I mean the public IP address, not the private one. I could load a page like whatismyip.com and just hit reload and see a new IP address show up every 5-10 seconds! This has lots of consequences for my online game, as many things "break" if the IP address changes for a given user. Basically, I would like to know more about this. Is there a name for the kind of network or router or paradigm that causes this, so I can read up on it? I don't understand WHY a network would function this way. Does it do this on purpose? Is it for security reasons? Is it to anonymize and protect the identity of the users? Or is it just an "old" method that is mostly obsolete in the rest of the world? Thanks for any info that will help me to understand.

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• subdomains to different VMs on one IP address

  - by efbenson

  I have a setup at home with an ESXi server Freenas server and several win7 clients. I have a domain refactoringme.com I set the @ and WWW domain record to my (current) IP address. I then forwarded port 80 to my local win2k3 server on my Linksys router and used host name matching to run the 5 test sites I have. That all works. Now I want to use the turnkey machines and move to dedicated VM servers. One for a wiki one for SVN etc. So how do I get www.refactoringme.com to go to one internal IP address and wiki.refactoringme.com to different internal IP address, while they both use the same external IP address? I added the additional record for wiki to my domain and pointed it to @. I figured it had to be involving a real firewall. So I installed PFSense on a VM and set it on the DMZ on my Linksys. From this point I haven't had any luck. I thought that maybe it would be in the DNS Forwarder or maybe in the Rules sections but neither have worked. Am I doing it wrong or on the right track but am missing something. Thanks for all the help.

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• Delay NTP Initialisation, Cisco 877W, IOS 12.4(24)T1

  - by Mike Insch

  I have a Cisco 877W which I'm using for my home ADSL connection (and as a refresher in Cisco IOS). I've got a working config in-place with my PPPoA connection coming online correctly, and VLANs and other settings configured as I want them, but I can't crack the NTP configuration. For NTP, I have the following defined ntp server 0.uk.pool.ntp.org source Dialer0 ntp server 1.uk.pool.ntp.org source Dialer0 ntp server 2.uk.pool.ntp.org source Dialer0 ntp server 3.uk.pool.ntp.org source Dialer0 This setup works fine when issued in Global Configuration Mode when the Dialer0 interface (ATM0.1) is up. The configuration fails at startup though: Translating "1.uk.pool.ntp.org"...domain server (208.67.222.222) (208.67.220.220) ntp server 1.uk.pool.ntp.org source Dialer0 ^ % Invalid input detected at "^" marker. This is repeated for the other servers defined. Obviously the DNS lookup for the server(s) fails because the DNS servers cannot be accessed because the external interface is not yet online. Is there a way to delay the NTP configuration until afte the Dialer0 interface is fully initialised? Can the NTP commands be triggered by the Line Protocol on the Dialer0 interface transitioning to the up state? Alternatively, can the NTP commands be delayed for 5 minutes after the router has finished initialising? Any advice, or pointers to useful documentation or examples gratefully received ...

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• fast way to find network user computer on domain hogging all wan bandwidth

  - by dasko

  i have a network of about 40 domain users and i have huge latency wan issues, like 1400ms for google.com pings. I have noticed that the problem goes away after everyone goes home for the day. I would like to know if i should use something like a hub with wireshark on the router or modem to see if there are any irregular activity. I am open to suggestions but i need to isolate which user has the bug. I am assuming it is either downloads or someone spamming out heavily and not knowing. It would be best to trace to ip number so i can just look into dns and find the pc hostname with the problem? This is the first client i have this problem with so never really needed to address it before but not suprised as users don't actually listen to any best practices that we have suggested. Please help, thanks. just to update, pc's to routers and other computers have ping latency of 1ms so it is right after i hit the wan, using tracert to a web site (random), that i get the massive delay in the responses. As well this is a dsl line with 5mb down and 650kb up (maybe upload saturation?) thanks.

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• Mac Security - Which one?

  - by Bob Rivers

  Hi, Recently I had my credit card cloned. A few hours after shopping at an online store (in which I trust and buy since 2006) I received a call from my bank asking if I recognize a $5,000 debt to a store(?!) called Church of Christ... I'm a Mac user (OS X 10.6.3). I always kept my system updated and I have firewall enabled (in my Mac and in my broadband router), but I decided to adopt some kind of protection. I don't want to rise passionate discussions. Real or not, snake oil or not, I need to have back my peace of mind... I read this and this posts. I selected two software that I think that could help me (both have more features other than just an antivirus). Does someone have feedback about Intego's VirusBarrier X6 or Trendmicro's Smart Surfing? Intego solutions seems to be better, but TrendMicro brand/name is stronger in corporate environment, so their solution should be good. Both solutions have 30 day free trial, but I would like to hear something from you. Any other solution that I should look? TIA, Bob

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• Unable to connect to shared (iscsitarget) dvd-rw drive on ubuntu karmic box

  - by develop7

  Preface: I have desktop with DVD-RW drive that runs primarily on Linux (namely Ubuntu 9.10). My wife has netbook that rins Windows XP with no cd/dvd drive. There's also LAN through our ADSL modem/router. I've "ported" (actually, I've just grabbed sources and ran dpkg-buildpackage) iscsitarget package from Ubuntu Lucid to Karmic (here are packages), installed it (sudo aptitude install iscsitarget; sudo m-a a-i iscsitarget) and configured it in the following way (/etc/ietd.conf): Target iqn.2020-01.local.develop7-desktop:storage.disc.dvdrw Lun 0 Path=/dev/sr0,Type=blockio #I've skipped commented lines Also, I've opened port 3260 with ufw: $ sudo ufw status | grep 3260 3260 ALLOW 192.168.1.0/24 But (here's the trouble) I still can't connect to this target from Windows box. Microsoft Software iSCSI Initiator tells "Logon failure" upon connect attempt. After unsuccessful connection attempt I've noticed this line in dmesg | tail's output: iscsi_trgt: ioctl(299) invalid ioctl cmd c078690d So the question is — what's wrong with my config/iSCSI target/whatever else? Or, in short — what I'm doing wrong? Thanks in advance.

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• Unable to connect to shared (iscsitarget) dvd-rw drive on ubuntu karmic box

  - by Develop7

  Intro I have desktop with DVD-RW drive that runs primarily on Linux (namely Ubuntu 9.10). My wife has netbook that rins Windows XP with no cd/dvd drive. There's also LAN through our ADSL modem/router. I've "ported" (actually, I've just grabbed sources and ran dpkg-buildpackage) iscsitarget package from Ubuntu Lucid to Karmic (here are packages), installed it (sudo aptitude install iscsitarget; sudo m-a a-i iscsitarget) and configured it in the following way (/etc/ietd.conf): Target iqn.2020-01.local.develop7-desktop:storage.disc.dvdrw Lun 0 Path=/dev/sr0,Type=blockio #I've skipped commented lines Also, I've opened port 3260 with ufw: $ sudo ufw status | grep 3260 3260 ALLOW 192.168.1.0/24 Problem But (here's the trouble) I still can't connect to this target from Windows box. Microsoft Software iSCSI Initiator screams "Logon failure" upon connect attempt, and, respectively, fails to connect. After unsuccessful connection attempt I've noticed this line in dmesg | tail's output: iscsi_trgt: ioctl(299) invalid ioctl cmd c078690d Question So the question is — what's wrong with my config/iSCSI target/whatever else? Or, in short — what I'm doing wrong? Thanks in advance.

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• Split Tunnel VPN using incorrect Tunnel

  - by Brian Schmeltz

  Our company has a handful of field offices that have recently been setup with a regular internet connection after we removed the T1 and router that connected them directly to our network. Now, when the users are in the office, they log in to the VPN to be able to connect to the network. For the sake of them being able to print and scan from the local multi-function we have setup a split tunnel VPN. We currently have about 15-20 users using this setup around the country without any problems. Recently one of our users started having problems accessing internal programs/sites when connecting from both home and the office. There are three other users in the same office and they do not have this problem. I assumed that it was something with the computer and went ahead and replaced it with another of the same model. The computer worked fine in our home office; however, when the user received it, she had the exact same problem both at home and in the field office. Thinking it may be a NIC driver issue I sent her another computer, this time a different model, same problem occurred. If I update the host file to point to the correct paths, things will work, and if I connect via a normal VPN connection everything works, but the user cannot scan or print - which is a problem. Have tried to find ways to create another tunnel on a normal VPN and have tried to find ways to force the correct tunnel on the split tunnel VPN. It appears that there is something related to the ISP because if I connect to Comcast or Verizon it is fine but once she connects to Insite then she has problems. I have been unable to get any support from Insite as they don't feel the issue is with them. We use a Nortel VPN client. Any thoughts or ideas would be appreciated.

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• How do I get netcat to accept connections from outside the LAN?

  - by Chris

  I'm using netcat as a backend to shovel data back and forth for a program I'm making. I tested my program on the local network, and once it worked I thought it would be a matter of simply forwarding a port from my router to have my program work over the internet. Alas! This seems not to be the case. If I start netcat listening on port 6666 with: nc -vv -l -p 6666, then go to 127.0.0.1:6666 in a browser, as expected I see a HTTP GET request come through netcat (and my browser sits waiting in vain). If I go to my.external.ip.address:6666, however, nothing comes through at all and the browser displays 'could not connect to my.external.ip.address:6666'. I know that the port is correctly forwarded, as www.canyouseeme.org says port 6666 is open (and when netcat is not listening, that its closed). If I run netcat with -g my.adslmodem's.local.address to set the gateway address, I get the same behavior. Am I using this command line option correctly? Any insight as to what I'm doing wrong?

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• Redundant OpenVPN connections with advanced Linux routing over an unreliable network

  - by konrad

  I am currently living in a country that blocks many websites and has unreliable network connections to the outside world. I have two OpenVPN endpoints (say: vpn1 and vpn2) on Linux servers that I use to circumvent the firewall. I have full access to these servers. This works quite well, except for the high package loss on my VPN connections. This packet loss varies between 1% and 30% depending on time and seems to have a low correlation, most of the time it seems random. I am thinking about setting up a home router (also on Linux) that maintains OpenVPN connections to both endpoints and sends all packets twice, to both endpoints. vpn2 would send all packets from home to vpn1. Return trafic would be send both directly from vpn1 to home, and also through vpn2. +------------+ | home | +------------+ | | | OpenVPN | | links | | | ~~~~~~~~~~~~~~~~~~ unreliable connection | | +----------+ +----------+ | vpn1 |---| vpn2 | +----------+ +----------+ | +------------+ | HTTP proxy | +------------+ | (internet) For clarity: all packets between home and the HTTP proxy will be duplicated and sent over different paths, to increase the chances one of them will arrive. If both arrive, the first second one can be silently discarded. Bandwidth usage is not an issue, both on the home side and endpoint side. vpn1 and vpn2 are close to each other (3ms ping) and have a reliable connection. Any pointers on how this could be achieved using the advanced routing policies available in Linux?

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• Install self-signed certificate on local server (iis)

  - by ile

  On this page there are instructions on how to create self-signed cert (on apache) and how to install this certificate on server. I found this page (http://www.visualwin.com/SelfSSL/) with instructions on how to create self-signed certificate on windows (iis). I followed instructions and when I type https://myip/myapp (this leads to localhost because I set my router's port forwarding to go to localhost on my pc) this part works. From the first link, the most important part is this: What needs to be installed in IE is actually the Root CA Certificate. In the how-to above, the Root CA Certificate is called ca.crt. Copy this file to the server that is running QuickBooks. The following is for IE6: - Open IE - Tools - Internet Options - Content - Certificates - Trusted Root Certification Authorities Tab - Import, Next, Browse to 'ca.crt' - Next, Next, Finish, Close, OK The part that is missing in second link is that there is no instruction on how to get .crt file, so I tried to get it myself. What I did was following: I opened https://myip/myapp in Firefox and then "This Connection is Untrusted" screen appeared. Then I clicked on "Add Exception" and then below "Certificate Status" I clicked "View". Under the Details tab I clicked on Export and choosed Save as type: "X 509 Certificate (PEM)" and file was saved with .crt extension. Then I opened IE8 and followed above instructions. After opening https://myip/myapp in IE8 I always get warning screen. Does anyone knows what am I doing wrong? Thanks, Ile

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• Computer causing WiFi interference?

  - by Mannimarco

  I came back from college and brought my desktop computer. Family recently switched to Verizon FIOS and got a new router because of it. Unfortunately, my connection to the new wifi network is awful, with the download speeds (tested through speedtest.net) fluctuating wildly and often dropping below 1.5 Mbps. A laptop in the same room gets 20 Mbps. I've tried a new wireless card, thinking that mine got damaged in the move home but no luck. Here's where it gets weird: if I place the laptop near the computer, the laptop's download speeds often suffer greatly. Pulling the laptop away always fixes this. So now I'm under the impression that there's something in the computer (which I built a year ago and has had 0 issues up to this point) is causing an insane amount of wireless interference. Also bizarre: the upload speeds seem unaffected by this problem. On the laptop and desktop, upload speeds are generally around 5 Mpbs. Any ideas as to what could be causing this and how to test said theories would be fantastic.

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• Virtualization and best hardware sharing scenario for me

  - by azera

  Hello, Following this thread on super user, I now want to start installing all my vm on the hardware. As a remainder, i have a (powerful enough) server on which i want to install 3 OS: there is a debian (general dev testbed purposes), an ipcop (network control/firewall) and a freenas (local network file sharing). I'm wondering which scenario would be the best for me and if I will be able to share the hardware to do what i want; either a - install an hypervisor like the free vmware esx and all three vms in it, or b - install debian, and the other two running inside it with virtual box My need being that: the ipcop should handle all network traffic to the internet, meaning all traffic from my main computer but also all traffic from the other two vm the freenas shares should be accessible from the other two vm and my main computer too i don't really care about the debian access, i only need to access it from my main computer, not the other vms Will I need to install additionnal network cards for each vm or can they all share the same one happily ? (right now I have two, one linking the server to my router [which only ipcop is gonna use] and one linking it to my switch [which i would like all three to use]) As for harddrives, I was going to use 1 harddrive cut in 3 partitions to install all three OSes, then add to that the freenas drives, will it be correct ? Thanks a lot for anyone who can help me, this is kind of a vast area and I'm not sure which way to go at all

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