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• Routing application traffic through specific interface

  - by UnicornsAndRainbows

  Hello All! First question here, so please go easy: I have a debian linux 5.0 server with two public interfaces. I would like to route outbound traffic from one instance of an application via one interface and the second instance through the second interface. There are some challenges: both instances of the application use the same protocol both instances of the application can access the entire internet (can't route based on dest network) I can't change the code of the application I don't think a typical approach to load balancing all traffic is going to work well, because there are relatively few destination servers being accessed in the outbound traffic, and all traffic would really need to be distributed pretty evenly across these relatively few servers. I could probably run two virtualized servers on the box and bind each of them to a different external ip, but I'm looking for a simpler solution, maybe using iproute or iptables? Any ideas for me? Thanks in advance - and I'm happy to answer any questions.

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• Pygrub with DRBD on Xen 3.2

  - by Joril

  Hi all, we have a two-node cluster using DRBD 8.2 on CentOS 5.2 64bit. The cluster runs a few VMs on top of Xen 3.2.1, here's the configuration for an Ubuntu Jaunty VM: name = 'dev' bootloader = '/usr/bin/pygrub' memory = '512' vif = [ 'ip=192.168.1.217,mac=00:16:3E:CD:60:80' ] disk = [ 'phy:/dev/drbd24,xvda1,w', 'phy:/dev/drbd25,xvda2,w' ] As you can see, the disks are specified like "phy:", and as such pygrub doesn't know a thing about the underlying drbd device... So my problem is that even though the VM boots just fine, it doesn't handle the state of the drbd device. As a result, when for some reason the device gets to a secondary/secondary state, the VM won't boot, and I have to manually specify which node is primary. I read that starting with Xen 3.3 pygrub understands the "drbd:" specification, and I think that it would fix my problem, but I can't upgrade Xen at the moment... Is there a workaround? For example, could I use the 3.3 version of pygrub? Thanks!

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• Intermediate SSL Certificates on Azure Websites

  - by amhed

  I have successfully configured an Extended-Validation Certificate on an Azure Website following this article: http://www.windowsazure.com/en-us/documentation/articles/web-sites-configure-ssl-certificate/ The main (non-technical) stakeholder of the web application went through great lengths to validate that our site is secure. He went to this site to check the validity of our SSL: http://www.whynopadlock.com/ The site throw the following error: `SSL verification issue (Possibly mis-matched URL or bad intermediate cert.). Details: ERROR: no certificate subject alternative name matches`` The certificate is installed using IP Based SSL instead of SNI. This is done this way because some site visitors still use Internet Explorer 8 on Windows XP, which has no support for SNI and throws a security warning. Is my certificate correclty installed? I received three .CRT files from my SSL provider: PrimaryIntermediate.crt SecondaryIntermediate.crt EndCertificate.crt This is how I exported our certificate as a .PFX file to Azure: openssl pkcs12 -export -out myserver.pfx -inkey myserver.key -in myserver.crt

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• There is a porn domain pointing to my site

  - by Nicolas Martel

  Let's say example.com is my real site, and fooexample.com is the porn site. fooexample.com are pointing to my ip. Now you could think, just don't mind it right. Well the thing is that they are driving load of traffic. Not only that, but my main domain example.com become unavailable after a couple of minutes and the only domain that work is either fooexample.com or none of those 2. What i have done so far was using mod_rewrite to redirect the porn site to google but my domain still become unavailable. Blocking the ips served no result either. I hope someone will be able to help me because this is a huge problem right now. Thanks.

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• How can I remove the ssh last login info?

  - by Gnijuohz

  Whenever I log into a server using ssh. The prompt gives me "last login" information. I was wondering where this information comes from. How can I remove this record so when someone else log into the same server, the person would see my login info with my ip in it? So how can I do this? For the record, I am not hacking someone's computer and the server runs Ubuntu 12.04. EDIT: which file logs this kind of information? If I find the file, then I can do anything to it as root. Thanks.

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• Restrict access to SSH for one specific user

  - by j0nes

  I am looking for a way to secure my servers with the following setup: I have a server where I can log in via SSH. The main account there (named "foo") is secured by a keybased login with password. I have another user account (named "bar") that I use to log in via cronjobs running on other servers - this one also has keybased login, but without password. Now I want to limit access to this machine for the "bar" account. The account should only be accessible via known IPs. However, the "foo" account should not be affected by this, this one should basically be accessible from any IP. How can I manage this? Or is there a simpler solution to everything?

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• creating secure multicast with socat

  - by arash

  How we can create secure tunnels multicast with socat? Assume we have a list of ip address, CIDR network addresses that we want to create secure tunnel to them. I found this socat STDIO UDP4-DATAGRAM:224.1.0.1:6666,range=192.168.10.0/24 but I want a secure tunnel and different adds with net addrs I want to create script that give the IPs and net addresses and create secure tunnel ./myscript IP1 NetAdd1 IP2 NetAdd2 .... how can i send this parametersw to socat? Socat multicast hasn't any limits? Thanks for your help

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• Outlook Anywhere remote https connection issue

  - by holian

  We have SBS 2003, and we use DYNDNS. We forward dyndns address 443 to local server ip 443 port. mycompany.dyndns.org:443 -- server.mycompany.local:443 In android phone i can check my mails with Outlook Active Snyc. From remote machine i can check my mails in owa (https://mycompany.dyndns.org/exchange) But i can't set up outlook 2013 to remote connect. I installed server.mycompany.local to remote machine trusted cert container, but i got error message: "There is a problem with the proxy server's security certificate. The name on the security certificate is invalid or does not match the name of the target site. Outlook is unable to connect to the proxy server. (Error Code 10)" Is it possible to connect exchange, via dnydns? Whats the problem? Thank you

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• REST-based file server

  - by Chris Wenham

  I need to be able to PUT files and GET them later using nothing but HTTP, so I went searching for something that might match the terms "REST file server" or "HTTP file server" or "REST drop-box", etc. Unfortunately, these terms bring up the wrong kind of results on Google. What I want is the equivalent of an SMB fileshare over HTTP. Some ideal features: Can PUT a file of any type at http://servername/service/any/path/I/want/document.pdf Anyone with access can GET that file at the URL I PUT it at Supports AV scanning on any new file that has been PUT Supports DELETE of existing resources (files) Our shop runs Windows, but I'd be interested to know about Unix software that can do this kind of thing, too. It's to be used in an IT department for private users only. It won't be on a public-facing IP address. Does anything like this exist?

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• Setting up wifi router as a switch for Internet Connection Sharing

  - by William C

  Can my laptop with a 3G connection share its Internet via a Wifi router (Dlink DIR-615)? I turned Internet Connection Sharing on and Windows assigned 192.168.137.1 to my laptop's LAN adapter. Do I connect my laptop to the WAN port or to the LAN port of the router? What should I set as my router's IP address? Do I turn DHCP on my router on? Do I assign 192.168.137.x as static addresses on the other computers? If not, what? Is there anything else I need to set on my router? Thank you!

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• Does a bad Internet connection increase bandwidth usage?

  - by Synetech

  My (Rogers) cable connection has been pretty bad recently (channels 3 and 10 are particularly fuzzy—it’s analog, not digital cable). Not surprisingly, this has caused my cable modem to drop out and have to reestablish a connection a couple of times since it started. The poor connection of course means higher corruption (not necessarily dropped per se) which causes the TCP/IP stack to have to retransmit packets more often. Reduction of bandwidth throughput aside, I got to wondering if it increases the actual bandwidth usage. That is, if there is a high error rate on the line causing packets to have to be retransmitted: Does this increase a bandwidth monitoring program’s numbers? Does the ISP count the retransmitted packets toward the monthly cap? Based on what I remember from my university networking courses and common sense, I have a feeling that the answer to both questions is yes, but I cannot reliably measure the first, and have no authoritative answer for the second. I’m wondering if maybe the retransmitted packets are acknowledged as being duplicates and thus not counted somewhere along the line.

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• How to route all traffic over site to site VPN tunnel?

  - by Hutch

  I have a site to site VPN configured between our main site (Site A) and a remote site (Site B). Site A is 10.60.0.0/16 Site B is 192.168.99.0/24 The firewall in Site B is a Juniper SSG running ScreenOS 6.3 and I'm using a route based VPN. The tunnel works perfectly in that from Site A you can reach 192.168.99.0 via the tunnel, and from Site B you can reach 10.60.0.0 via the tunnel. However, we want it so that if you're in Site B and want the Internet it goes via the firewall at Site A, and right now on the Juniper 0.0.0.0 has the ISP router as next hop. My understanding is that on the Juniper, I can set a route for the /32 public IP at our main site that the VPN tunnel connects to to the ISP router via ethernet0/0 (the SSG's external interface), and then modify the 0.0.0.0 route to use our main site firewall via tunnel.1 (the VPN tunnel). Not sure I've explained that so well but is my understanding correct? Thanks

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• Active Directory Replication across Sites slow or not working

  - by neildeadman

  I've just inherited (isn't it always the way!) a Windows Domain. The domain is spread across 2 sites. Site01 has 3 DCs & Site02 has 2 DCs. If I create a user in either site, the other DCs in that site, immediately replicate and show the new user. The new user is not shown in the other site though. If I manually run the following command, everything syncs and the new user appears: repadmin /syncall issdc01 /APed In the Inter-Site Transports DEFAULTIPSITELINK the replicate every time value is set to 180 minutes. I thought this was the solution, but on another Windows Domain, this is the same, but replication takes place across sites immediately. What can I check to resolve this issue? We are running Windows Server 2008 Results of dcdiag /test:dns show a server that is no longer part of our domain: TEST: Delegations (Del) Error: DNS server: oldserver.win.domain.com IP: [Missing glue A record]

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• Can't access LAN computers with SSH

  - by endolith

  I got a new Windows 7 machine, and was using VNC,SSH etc to connect to my Ubuntu machine, and it worked fine previously. Now it doesn't work if I use the machine's hostname or local IP, but if I use the DynDNS name, it works. I can also access it from my Android phone using the local hostname over SSH. If I try to connect with SSH to the hostname, it says "Host does not exist". VNC says "Failed to get server address". NX says "no address associated with name", and I don't see it in Windows' "Network" folder. I've rebooted everything. I've turned off Windows firewall. It was working fine a few days ago, but now it's not. How do I figure out what's blocking it?

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• SQL Server Configuration Manager menu won't show up

  - by Aurelien Gasser

  I'm running a Windows 8 VM on a MacBook using Parallels Desktop 9. On this Windows VM, I have a SQL Server instance running perfectly. However, when I launch SQL Server Configuration Manager, and I want to enable an IP configuration, the Enable menu options are invisible : Here is a screenshot : http://i.imgur.com/PY7qGup.png (I don't have enough reputation to display the image inline) When I click the arrow, a contextual menu should appear with 2 choices "Yes" or "No". Instead, a tiny contextual menu appears, but it's empty. I tried using my keyboard tab/space/arrows keys without success. Has anyone faced/solved the same problem ?

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• Xmail shows error at Gmail

  - by Karthik Malla

  Hello I am using Xmail server at IP 65.75.241.26 hosted at www.softmail.me using which I can send and receive email to/from all email service providers but unable to receive back from Gmail. This error lies only with Gmail. Experts says that Gmail requires proper working MX records where as for other emailing providers do not bother much. Is MX records the solution for my problem? Or is there any other issue? My mailserver outgoing at softmail.me:25 My mailserver incoming at softmail.me:110 Please help me how to get rid of this issue.

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• Apache: How can I make my localhost on 192.168.1.101 visible from 192.168.1.102?

  - by takpar

  Hi, I've setup a Apache web server on Ubuntu Linux. I can see http://localhost well. But I can't see localhost from other machines in my network using IP address: http://192.168.1.101 I added the lines below to my apache conf: `Allow from 192.168.1` but it did not work. It says "the connection has timed out". what should i do? PS: adp@adp-desktop:~$ sudo netstat -ap | grep apache tcp 0 0 *:www *:* LISTEN 10581/apache2 tcp 0 0 localhost:www localhost:46017 ESTABLISHED 10586/apache2

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• DNS not responding

  - by Born2win

  I have a Dlink DIR-615 router and I have it around six mounths. My internet connection is VPN (PPTP) based i.e. I have been give a username and password from my isp and my ip address is dynamic. But from few days I am experiencing a serious problem. My router connects normally (i can see yellow light) but my computer is giving "DNS not responding" error. I have tried everything (reset,reboot etc) but no sucess. Any help would be appreciated :)

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• Address VMWare Fusion Linux guest by hostname?

  - by amrox

  I have a Ubuntu Server 9.04 image set up in VMWare Fusion 3.0.0, using the NAT option for the guest's network connection. From the Mac host, I can ssh to the linux guest just fine using it's IP address, but I would like to be able to refer to it by hostname for connivence. ie: mac-host:~ ssh [email protected] I had a similar setup using Parallels a couple years ago, but I don't remember how it was set up. It may have "just worked". Any suggestion on how to make this work?

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• Unable to connect to Cygwin from Mac OS X by ssh

  - by skyjack

  I've started ssh server on Windows 7 using Cywgin and I'm trying to connect to it by ssh from Mac OS X Mavericks. It fails with next error: ./ssh username@hostname -v OpenSSH_6.6, OpenSSL 1.0.1g 7 Apr 2014 debug1: Reading configuration data /usr/local/etc/ssh/ssh_config debug1: Connecting to hostname [my ip] port 22. debug1: Connection established. debug1: identity file /Users/skyjack/.ssh/id_rsa type -1 debug1: identity file /Users/skyjack/.ssh/id_rsa-cert type -1 debug1: identity file /Users/skyjack/.ssh/id_dsa type -1 debug1: identity file /Users/skyjack/.ssh/id_dsa-cert type -1 debug1: identity file /Users/skyjack/.ssh/id_ecdsa type -1 debug1: identity file /Users/skyjack/.ssh/id_ecdsa-cert type -1 debug1: identity file /Users/skyjack/.ssh/id_ed25519 type -1 debug1: identity file /Users/skyjack/.ssh/id_ed25519-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.6 ssh_exchange_identification: read: Connection reset by peer Meanwhile I can connect successfully from Red Hat. OpenSSH version on Cygwin: OpenSSH_6.4p1, OpenSSL 1.0.1f 6 Jan 2014 OpenSSH version on MAC OS X: OpenSSH_6.6p1, OpenSSL 1.0.1g 7 Apr 2014 Please advice.

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• veriSign SSL Cert for subdomain

  - by Asghar

  I have purchase SSL for secure Site from Verisign. I have configured it and its working properly on https://www.example.com . I have subdomain app.example.com . i need to work SSL on this domain also. I have 2 Questions. 1- Will same SSL will work for the subdomain too? [My SSL is not wildcard SSL] 2- If it will not work. then how can i change the same SSL that it should only work on app.example.com. i mean is there any way to change purchased SSL for subdomain. and How can i do this. https://www.example.com and http://app.example.com point to the same IP address xxx.xxx.xxx.xxx

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• What port should I use for my reverse proxy to Apache 2 from nginx?

  - by meder

  I have nginx setup as the defacto port 80. I want to setup django+mod_wsgi on Apache2. I'm worried if I leave Apache2 as 80 it will cause a conflict. Is it better to avoid the headache and change Apache to a different port? server { listen 80; server_name work.domain.org; access_log /www/work.domain.org/log/access.log; error_log /www/work.domain.org/log/error.log; location / { proxy_pass http://127.0.0.1:8080/; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Magic-Header "secret"; client_max_body_size 10m; } }

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• Can ping localhost but can't browse

  - by Anna

  I know this is a pretty common question but I did my research and couldn't find a solution for this issue. I'm configuring a development application server and I came to the point where I can ping both localhost and 127.0.0.1, but I cannot browse either of them from IE or Firefox. I can browse and ping other websites (such as google) just fine. I tried flushing the dns (ipconfig /flushdns), restarting the IIS Admin service, restarting IIS itself, etc, and nothing seems to work. The results from ipconfig /all shows IP Rounting Enabled = No and WINS Proxy Enabled = No. Hwat is intriguing to me is that I compared everything in IIS in the dev environment with the production environment and the settings are the same, but I can browse localhost in production, but not in dev! What could be causing the inability to browse localhost and 127.0.0.1 from IE and Firefox?

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• How to enable RDP to a Server 2008 R2 on another network? VM network

  - by Saariko

  I have a W2008 R2 installed on a different network (I am on 192.168.0.x - new server on 192.168.3.x) I had trouble ping and RDP to it. I disabled the firewall to test the connection: and that opened the ping feature but I still can not RDP to that machine. the allow remote access is enabled As per sinni80 idea - Here is the error message The networks are divided by a Fortigate 60-B router - 2ndy interface for the gateway is 192.168.3.254 (and pingable from all) any to any rule on both networks is in place. As per Joe Schmoe idea - I am able to RDP to 192.168.3.1 from 192.168.3.3 (which is on the same network) Data to add: - The servers are on a VM host, each of the servers has 2 nics one is DHCP enabled into the 192.168.0.x network 2nd is static IP in the 192.168.3.x -- Further information: The network 192.168.0.x - are on a domain network (active Directory) The network 192.168.3.x - are grouped in a workgroup What should I check more please?

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• VMware 1.0.1 Windows7 - Ubuntu hostnames

  - by Kyle K

  I'm trying to run Ubuntu as the guest OS using VMWware 1.0.10 with Windows 7 Ultimate as the host OS. I had this set up previously with Win XP as the host OS and in fact I'm using the same .vmx My problem is I can't get either Win7 or Ubuntu to be able to ping the other by hostname. After installing Samba and Winbind on Ubuntu, I was able to get this working when under WinXP, but for some reason I can't get it to work under Win7. I can ping by IP Address, and the guest OS even shows up by hostname under the Windows networking panel (but of course I can't do anything with it), but pinging using short hostnames just won't work. Also, Win7 firewall is turned off completely.

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