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• IPv6 static routes

  - by user98651

  I am looking to configure a few hosts with IPv6 on my network. The router (running CentOS 5) is configured with an Hurricane Electric (HE) tunnel which works fine on that host. However, I would like to statically add a few additional hosts on the same LAN to have IPv6 through this tunnel. No, I don't want radvd or dhcpv6 to do the work for me in this case. I already have IPv6 forwarding enabled in sysctl.conf. I am looking for help with the next steps (statically adding the routes). Lets say the IP addresses are as follows: Router: 2001:470:1b07:1:: Host1: 2001:470:1b07:2:: How would I go about making them see each other? Thanks in advance for the help.

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• Unknown Host Error, is this a registrar problem or a host problem?

  - by jerrygarciuh

  Hi guys, I am dealing with a barrel of weasels on this one. Ad agency registered the domain in mid-August with Network Solutions. 72 hours ago I updated the DNS to point to a host provided by an associate of the client whose credentials are dubious. The DNS servers are at NETSONIC.NET (NS1 and NS2) and respond to ping no problem. I can FTP to the server using its IP but the name is no go. The name is also no go for tracert and ping: tracert voodoobbqfranchise.com Unable to resolve target system name voodoobbqfranchise.com. ping voodoobbqfranchise.com ping: unknown host voodoobbqfranchise.com I called NetSol and of course their tier one guy swears it must be the host but I insist that an unknown host must be a NetSol issue. Otherwise we'd get somethng like an httpd_conf error after being routed to the Netsonic server. Am I right? Is this an issue at the registrar? TIA JG

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• open mysql to any connection on ubuntu

  - by ThomasReggi

  I simply want to open up mysql to be accessible from any server ip. I have already commented out the bind-address in /etc/mysql/my.conf. I have already setup the user account within mysql. I have no clue whats stopping me from connecting. The more challenging I see this being the more I realize how much of a security risk it is, and I get that, I just want to be able to do it temporarily. I think that the iptables firewall is the last thing that is preventing me from achieving this, but sudo iptables -A INPUT -p tcp -m tcp --dport 3306 -j ACCEPT is seemingly doing nothing.

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• AWS RDS MySQL remote connection extremely slow

  - by nute

  I have a site hosted on AWS EC2 (Elastic Beanstalk), with a MySQL database hosted on AWS RDS. Everything works fine on the production server, fast and all. However when I try to connect remotely from my local machine, it sometimes gets extremely slow (like 4 minutes to load the list of tables), or simply times out. I added my IP in the security group (which I did correctly, since it sometimes works). When it doesn't work, I at the same time check the prod server and it still looks good.

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• Linux box acting as wireless access point to share the internet connection

  - by Suresh

  A linux machine is connected to internet over two interfaces ppp0 and ppp1 using two modems. Also this machine acts as wireless access point through an interface say, eth0 with ip address 192.168.1.1 and acts as gateway for the connected devices through this network with subnet mask 255.255.255.0 Now is it possible to achieve the following: When any of the connected devices through wireless AP needs internet connection linux machine has to use ppp1 interface for internet. If any of the applications on the linux machine needs internet connection linux machine should use ppp0 interface for the internet. Can this be achieved by adding rules to chains in filter/nat tables? If the kernel routing table has a default rule to route the default traffic through interface ppp0, wil kernel completely ignore ppp1 for internet? PS: new to networking and routing concepts, If the question is not clear leave a comment, will try to give more information.

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• Dual Home HP Server running Win2003

  - by Colm

  Hello everyone. I'm new to server dual homing. I have a HP ProLiant DL360 G4p running Win2003 with 2 NICs , only one is currently active. I'd like to activate the 2nd NIC connected (in a active/passive state) to a 2nd switch with only one IP address and ideally only one mac layer address. The 1st switch is a Cisco 2960G and the 2nd is a Cisco C3560G. There are VLANS, RSTP and PAGP in use already. Can someone give me an idea, in broad terms , of what technology/protocols I should be investigating (HSRP, SLB Teaming etc.) ? I can provide more info if needed. Thanks, Colm.

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• Mac Mini's internet very slow, every other device fine (PC, iPhone, Xbox 360)

  - by alex

  I recently haven't used my Mac Mini for about 5 days (however it was left on). I seem to be able to connect and get great download / upload speeds through my PC, Xbox 360, iPhone and parents' laptop. However, my Mac Mini is very slow. OS X's Mail.app is downloading mail at 0.4kbps and then dropping to 0. Skype file transfers are doing the same. Browsing the net is a terrible experience. It is taking 30 seconds or more to download basic pages. All of my devices connect wirelessly to a Netgear router / modem. I have tried giving the Mac Mini a manual IP, and renew DHCP lease, as well as flush DNS in Terminal. I have also rebooted the router / modem twice, and the Mac Mini twice. Do you know what could be causing this? Thanks

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• All traffic is passed through OpenVPN although not requested

  - by BFH

  I have a bash script on a Ubuntu box which searches for the fastest openvpn server, connects, and binds one program to the tun0 interface. Unfortunately, all traffic is being passed through the VPN. Does anybody know what's going on? The relevant line follows: openvpn --daemon --config $cfile --auth-user-pass ipvanish.pass --status openvpn-status.log There don't seem to be any entries in iptables when I enter sudo iptables --list. The config files look like this: client dev tun proto tcp remote nyc-a04.ipvanish.com 443 resolv-retry infinite nobind persist-key persist-tun persist-remote-ip ca ca.ipvanish.com.crt tls-remote nyc-a04.ipvanish.com auth-user-pass comp-lzo verb 3 auth SHA256 cipher AES-256-CBC keysize 256 tls-cipher DHE-RSA-AES256-SHA:DHE-DSS-AES256-SHA:AES256-SHA There is nothing in there that would direct everything through tun0, so maybe it's a new vagary of Ubuntu? I don't remember this happening in the past.

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• How to setup and manage a shared hosting server on Windows Server 2008 R2 Web Edition?

  - by Motivated Student

  Background I am a newbie in using Windows Server 2008 R2 Web Edition (and other editions as well). I have a static IP, a very fast internet connection, a server (PRIMERGY TX100 S1 Server) and Windows Server 2008 R2 Web Edition (trial version). The objective is to setup the server to be a shared hosting server such that each of my friends has a private account to manage his/her domain. to upload his/her web content to the server using the encrypted ftp. to manage database administration. to manage Certificate. etc Questions Is there a good reference to learn "how to setup and manage a shared hosting server on Windows Server 2008 R2" ? What are the rough steps I have to do to accomplish my objective?

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• Can't access VirtualBox host-only network from windows host

  - by Markus Orreilly

  I've got two vms running on a windows host, each with a host-only network and ips in the 192.168.56.XXX range. One of them is running apache and serving some content that I want to access from my windows host. However, the windows host can't access the apache server at all. The server is running on 192.168.56.103. ipconfig from windows says it's ip for the Virtual Box interface is 169.254.143.37. I tried route add to route 192.168.56.XX traffic, but everything I tried didn't work and I was probably using it wrong. Any ideas on how to make this work?

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• accessing a web server from the LAN and WAN

  - by jessh

  My router does not support loopback. In order to view a webpage on my server, I either have to type in the local ip (192.168.1.201), or be on another network. What are my options for making this easier? Here are some possible things: Route all web traffic through an external proxy (seems to be overkill) Run my own DNS server (where to start?!) Buy a new router that supports loopback. Surely there is another way that I can use my laptop on the LAN and the WAN by typing in my domain more easily than these solutions.

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• Windows server 2008 rejecting packets from client

  - by l46kok

  We deployed a server application in .NET 4.0 that is going to run on Windows Server 2008 R2. Strangely, the clients cannot connect to the server given an external IP and the server port. I've ran wireshark diagnostics on the server computer and verified that the packets are arriving to the NIC without any issue so it seems Windows Server 2008 is the culprit here. I've tried to temporarily disable the firewall and add the server port into inbound/outbound rule but it still doesn't solve the issue. How can I solve this issue?

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• Slow internet using Arch Linux

  - by GZaidman

  after a week or so of using Arch Linux I cant access the internet - it takes around 5 mins to load google (most of the other websites just give me a timeout), pacman's downloading speed range between 5-2Kbs, and pinging google takes around 9Kms. I'm connected using wireless network (wifi card is Intel Ultimate 6300 and router is Edimax 6524n). Every other Windows machine that's connected to the network (and even the T410 running Windows) is fine, so the problem lies in Linux. So far, i checked the resolv.conf file (my router ip address is listed), and the hosts file (pretty much default), and I disabled the ipv6 module. None of that helped. PS: i'm using NetworkManager (but the problem still occurs when connecting using wicd) running on Gnome3. Thanks in advance for any help you can provide! EDIT: something really strange happens whenever I ping google: i get an unknown host 'google.com', but the bit rate from the card jumps at the exact second I ping google (so far, the bit rate jumped to 54Mb/s from 1Mb/s over the course of 4 pings).

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• DNS resolution over DHCP

  - by Eric

  I have a m0n0wall router a VMWare workstation running ubuntu a windows 7 workstation running the VM The ubuntu hostname is "renraku" From the windows machine I can't resolve dns automatically for this host. For example, when I ping renraku Ping request could not find host renraku. Please check the name and try again. However nslookup seems to work nslookup renraku Server: m0n0wall.local Address: 192.168.123.254 Name: renraku Address: 192.168.123.248 I don't get how to have ping to work with hostnames. The main goal behind this is to have my web server to work with hostnames instead of ip addresses EDIT : ping 192.168.123.248 works

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• Exchange Disconnecting on EHLO with remote telnet

  - by Timothy Baldridge

  When I go to the local terminal on my Exchange box (SBS 2008) I can do this: telnet 127.0.0.1 25 220 Exchange banner here EHLO example.com 250 Server name However when I go from another box, or from the actual IP of the server I get this: telnet 192.168.21.20 25 220 Exchange banner here EHLO example.com 421 4.4.1 Connection timed out Connection to host lost. The odd thing is, this server is currently in production and working fine (receiving mail for our entire domain). But my C# programs can't send mail to it (they get this same error). Any ideas?

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• Domain connection shows as "unauthenticated"

  - by gareth89

  I have seen various different questions for this problem floating around but either the circumstances arent the same or the solution doesnt work so thought i would post it to see if anybody has any suggestions. Various domain PCs and laptops appear to randomly give the connection name of "lewis.local 2(Unauthenticated)" - lewis.local being our domain - and provides an exclamation mark where the network type logo is normally shown. This also appears to happen every time connecting via vpn. Our setup is: 2 servers both running windows server 2003 R2 (x32) main server has AD, DNS and DHCP installed IPv4 on approx 30 client machines (some wired, some wireless) If anybody has any thoughts on solutions i would appreciate it. I have tried removing all but AD server roles, resetting all of the systems and nothing. It doesnt prevent anything from working just like a domain connection most of the time however it is getting fustrating! Also dont know if it could have anything to do with it but the DHCP server seems to have quite a long lead time on issuing the IP address to the client.

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• Bridging VirtualBox over OpenVPN TAC adapter on Windows

  - by Sean Edwards

  I'm trying to configure a virtual machine (VirtualBox guest running Backtrack 4) with a bridged adapter over a VPN connection. The VPN is is hosted by the cybersecurity club at my university, and connects to a sandboxed LAN designed for penetration testing against various servers that the club has built. My host (Windows 7 Ultimate) connects to the VPN fine and is assigned an IP through DHCP, but for some reason the VM can't do the same thing, and I'm not sure why. It's like OpenVPN is filtering out packets from the MAC address it doesn't recognize. I want the virtual machine to bridge over the VPN connection, because our IT office has very strict policies about what you can and can't do on the network. I want to be able to run active attacks (ARP spoofing, nmap, Nessus scans) in the sandbox environment without risking the traffic accidentally going over the university network and getting my internet access revoked. Bridging over the VPN connection and running all attacks from inside the VM would solve that problem. Any idea why the host can use this interface, but the VM can't?

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• Need help setting up mail DNS records

  - by Dave

  Hi, We are hosting our web site on host monster, but want our email to continue to be hosted at the old site. Our domain points to the hostmonster DNS servers, but I can't figure out the right configuration for the remote email servers. We have one MX entry, which is priority: 0 domain: ourdomain.com And then we have these DNS entries ... name: mail.ourdomain.com ttl: 14400 class: IN type: A record: old.host.ip.address name: mail1.ourdomain.com ttl: 14400 class: IN type: A record: old.host.secondip.address Can someone tell me what I need to add/edit to get mail to correctly route to our old host? Thanks, - Dave

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• I cannot access my mongodb from internet ,Anybody can help me?

  - by VicoWu110

  I am using Mongodb database ,which is installed in my ubuntu with the ip address 126.22.252.25. The ubuntu version info is Ubuntu 12.04.3 LTS. My mongodb use the default 27017 port .On this local machine , I can use command "mongo --host 126.22.252.25" on the local machine to access, but I cannot use this command on any other linux mathine to access the db,nor can I use "telnet 126.22.252.25 27017" on my windows machine.I am sure 126.22.252.25 machine is accessable from internet because I can use winSCP and secureCRT to login to it.I run command "netstat -tnlp" , it shows below: tcp 0 0 0.0.0.0:27017 0.0.0.0:* LISTEN I have already change the /ect/mongodb.conf file , modifying bind_ip parameter from 0.0.0.0 to 126.22.252.25 So ,anyone can help me?

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• After low level formatting can microsoft track previously pirated windows installed on pc

  - by Neelabh

  I am getting call from Microsoft and they are forcing me to purchase so many licensed software but my budget is not that much.. So they are asking for On-Site Audit (SAM Review)... So I did low level formatting of my All PC's and Installed Ubuntu. So can they track I installed pirated windows xp earlier on these system or I need to change hardware.. After formatting on what parameter Microsoft Track earlier piracy: 1) By any Harddisk ID 2) By any Motherboard ID 3) By any IP Address Please help me otherwise I have to borrow so much money for licensing fee. Thanks in Advance..

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• Should I consolidate multiple identical VMs into BSD jails?

  - by Josh

  We run a number of Openfire XMPP/Jabber servers. Due to the way Openfire works, we cannot easily run multiple Openfire instances on one server, so I have 5 identical VMware ESXi VMs, each with CentOS, MySQl, Java, and Openfire. They're the exact same, except for their IP addresses, the actual Openfire MySQL database and it's config file. I am wondering if this is the optimal configuration, or if it would be better to move these VMs to a single FreeBSD machine and put each one inside a FreeBSD jail. Specifically, I am wondering if the benefit of VMWare's Transparent Page Sharing (TPS) would outweight the cost of running 5 identical OSes. Would I end up using less memory with one large FreeBSD machine and java running in bsd jails?

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• Netgear Wireless-n 150 wrn1000v2

  - by Jordan

  I'm not sure if this is the place to ask this question, move it if it's not. I'm trying to fix a wireless network. It only connects to a few devices and when it does work the connection is spotty. The router is a netgear wireless-n 150 wrn1000v2. Connecting to the router isn't a big problem, but connecting to the internet via WiFi is. I can't upgrade the firmware becuase it is from Comcast and it seems as though they only allow their versions of the firmware. I've monitored the network with wireshark and I see that the devices that are having trouble connecting are constantly asking "who is 192.168.1.1 tell 192.168.1.x" where x is the ip for the device. 192.168.1.1 is the router. This is from running wireshark on the wireless device. What does this mean. At this point I feel like buying a new router is the only option.

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• DHCP over WiFi on CentOS 6 [closed]

  - by dongle26

  Using CentOS 6 I cannot get my WiFi interface to configure over DHCP. Here is my ifcfg-wlan0: This does not work (although it is correct): DEVICE=wlan0 BOOTPROTO=dhcp ONBOOT=yes HWADDR=xx:xx:xx:xx:xx:xx TYPE=Wireless This works: DEVICE=wlan0 BOOTPROTO=none ONBOOT=yes IPADDR=192.168.0.253 NETMASK=255.255.255.0 DNS1=192.168.0.99 GATEWAY=192.168.0.99 HWADDR=xx:xx:xx:xx:xx:xx TYPE=Wireless I don't want a static IP address, I want a DHCP assigned address. Update: Both of the above configs are correct. Please don't downvote, this really didn't work for me. It must be a bug in CentOS or my wireless driver. See my answer for details.

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• What value does SenderID provide over SPF and DKIM?

  - by makerofthings7

  I understand that SPF "binds" a message envelope to a set of permitted IP addresses. SenderID (with the default pra option) "binds" the message header to a set of permitted IPs in addition to the SPF logic. DKIM "binds" the from address header (and any additional header the sender chooses), and the body to a DNS Domain name I'm using the word "bind" above instead of "authorized" because it makes more sense (to me) Questions: If SPF is already verifies a message FROM in the envelope, why is there a need to check the headers? When would the need to verify the envelope (SPF) need to be different than the headers (SenderID) If I'm already verifying the headers with DKIM, why do I need SenderID? Most large companies I've checked don't disable SenderID with an explicit record. EBay is a notable example of one that does. What is the rationale for disabling SenderID "pra" processing of outbound messages?

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• Detecting man-in-the-middle attacks?

  - by Ilari Kajaste

  There seem to be many possible ways to create man-in-the-middle attacks on public access points, by stealing the access point's local IP address with ARP spoofing. The possible attacks range from forging password request fields, to changing HTTPS connections to HTTP, and even the recently discovered possibilit of injecting malicious headers in the beginning of secure TLS connections. However, it seems to be claimed that these attacks are not very common. It would be interesting to see for myself. What ways are there to detect if such an attack is being attempted by someone on the network? I guess getting served a plain HTTP login page would be an obvious clue, and of course you could run Wireshark and keep reading all the interesting ARP traffic... But an automated solution would be a tiny bit more handy. Something that analyzes stuff on the background and alerts if an attack is detected on the network. It would be interesting to see for myself if these attack are actually going on somewhere.

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