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• Is IPv6 multicast routable over the Internet?

  - by Absolom

  As I understand it, public IPv6 addresses allocated by the IANA will have the prefix 2000::/3. These ip addresses will be routable through the Internet. IPv6 multicast addresses on the other side are prefixed FF00::/8. So my understanding is that the ipv6 multicast addresses won't be routable through the internet. I am right? If so, is there any way to do one-to-many ip routing over the Internet in IPv6? Thanks!

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• Cannot connect via OpenSSH and FTP to my ubuntu server

  - by budde

  Hello I have installed a webserver (ubuntu server 10.04) and it is connected to the internet. I can tell because the apache server apparently is working. But i can't get SSH or FTP to work. When I try to login from my laptop (SSH user@my-ip) ,SSH asks for my password, and when i give it, it does nothing! Also when I give the wrong password, it tells me that the password is incorrect. I'm also receiving an error while trying to connect by FTP. Sorry could not display all the contents of "/ on [my-ip]": DBus error

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• Can't connect to service on ubuntu?

  - by user36914

  I have a service i just installed on a ubuntu workstation machine. Say its running under port 511. I can connect locally : telnet localhost 511 When i try to connect from a remote machine it fails telnet 192.168.0.1 511 Whats wierd is i tried to connect locally using the ip address and i get the following error: "Unable to connect to remote host: Connection Refused" I checked the status of the firewall: sudo ufw status and get back "status:inactive" So does anyone know why i can't connect remotely since the firewall is disabled and why can't i connect locally using its ip address. I don't know if this matters but its running under esxi.

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• Bringing the xenbr0 interface up on XEN under Ubuntu 8.04

  - by iyl

  I installed XEN on Ubuntu 8.04 using this tutorial: http://www.howtoforge.com/ubuntu-8.04-server-install-xen-from-ubuntu-repositories but after I reboot with the XEN kernel, I don't have xenbr0 device. I see that network-bridge script runs and it creates peth0 device, but not xenbr0. I have a very basic IP setup, with a single static IP defined in /etc/network/interfaces. The only unusual thing is that my hosting (1&1) gave me a netmask 255.255.255.255, so I had to add the default gateway with this script: /sbin/route add -host 10.255.255.1 dev eth0 /sbin/route add default gw 10.255.255.1 Everything else is plain vanilla Ubuntu 8.04.

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• software to view logs on remote server

  - by Tarun

  I have configured syslog server on my linux machine like this Linux Machine (syslog client) -- Linux Machine (syslog server) I have configured it and its working properly. Now, the problem is I want to look at the logs located on remote server in a particular directory for example /var/log/host-ip/httpd.log. One way is that I use ssh for that and then see those logs using commands like tail etc. So is there any Browser based graphical utility which I can use on my machine in which I just give the remote folder location, ip-address etc. and the software shows me the logs present on that remote server. Thanks.

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• protect my web server

  - by kareemsaad

  how can I know who enter web server and how can I protect my IP from others?

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• Manage a lot of open ssh sessions to servers with id's for hostname

  - by kimausloos

  Lately I'm working a lot with a few open ssh connections to multiple VPS servers. The hostnames of the servers all follow an ID approach and it's becoming very difficult to know on what machine I'm working with. I was wondering if there is a way to put a name I define somewhere as the title of the terminal. So I would, for example, associate IP 123.123.123.123 with webserver-stg. When opening the connection to the IP, webserver-stg would automaticaly be displayed as the name of the session. Of course I'm not able to change code on the VPS servers, so the solution should be client-side.

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• Frequent connection drops when playing online games (StarCraft 2, Battlefield 3) and behind NAT - how to diagnose?

  - by Moshev

  I am having some trouble with (I suspect) my wireless router. It's connected to the internet with a regular lan cable and has a static, public IP address. Our two home PCs connect to the router with regular lan cables, plus there's a laptop which connects over wifi. diagram: Internet | | <- isp-supplied cat5 ethernet cable | D-Link D300 ...wifi... laptop / \ / <- cable -> \ PC1 PC2 The PCs and laptop are behind NAT and share the router's public IP. The router is a D-Link D300. PC1 is used for online gaming and I'm experiencing frequent "connection dropped" errors when playing Battlefield 3, StarCraft 2 and the Diablo 3 beta; but not with TeamFortress 2 or the Tribes Ascend beta. The issue goes away when I remove the router and connect PC1 directly to the ISP's cable. I have also tried disconnecting PC2 and the laptop, leaving PC1 as the only machine connected to the router - doesn't help. How can I diagnose what precisely the issue is?

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• Utilu IE Collection IE6 crashes under Windows 7

  - by Aron

  I've installed Utilu IE Collection under Windows 7 64-bit, but am unable to successfully run IE6 (specifically, "Internet Explorer 6.0 (6.00.2900.2180)"). I haven't tried other versions of IE from the package, so their behavior is unknown. It starts up fine, but the address bar isn't shown. (Attempted to post image, but I'm a newbie on SU and it wouldn't let me. Can be found here.) View-Toolbars shows 'Address Bar' already selected. If I try to (de-)select Address Bar in that list, it crashes: Problem signature: Problem Event Name: APPCRASH Application Name: iexplore.exe Application Version: 6.0.2900.2180 Application Timestamp: 41107b81 Fault Module Name: StackHash_e162 Fault Module Version: 0.0.0.0 Fault Module Timestamp: 00000000 Exception Code: c0000005 Exception Offset: 00000000 OS Version: 6.1.7600.2.0.0.256.48 Locale ID: 1033 Additional Information 1: e162 Additional Information 2: e1625455580a00d3fda64a8cdf366fbb Additional Information 3: 58c7 Additional Information 4: 58c75753c6745fad91929ab6430a83fa That's not all that's wrong ('Search' pane has no contents as well, probably more), but it's the most glaring problem. I've seen some allusions to a registry change needed to fix this, but haven't been able to find any details. Anybody? I'm running the latest version of the collection, 1.7.0.6.

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• solving network connection problem on xp

  - by doug

  Hi there I feel so stupid, because I have to fix my dad computer(which was mine years ago). So it is an old computer on which I have installed windows xp and the drivers for main-board. The device manager says that I have no more problems with the hardware. That computer has to connect to a router from my room but it doesn't. On ping 192.168.2.1 I get "Request time out"., The other computers are connecting to that router. Only the old computer doesn't connect to the LAN and later to the internet. Also it doesn't get a good IP(from the same class). After running ipconfig command I know that i have an IP with 169.... What can I do? Do you have any tips for me?

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• Local Network - Windows 7 and Vista can't see each other

  - by ca8msm

  I've got a strange issue at home that has been bugging me for weeks, but I really need to get it sorted now so I'll detail as much as I can and hopefully someone can spot what might might be wrong. I have a wireless router connected to the internet and 3 devices connected to it. They are: Name OS Network IPv4 PC1 Windows 7 WORKGROUP 192.168.2.2 LAPTOP1 Vista WORKGROUP 192.168.2.3 PS3 192.168.2.4 and they all get their IP addresses dynamically. Both PC1 and LAPTOP1 can ping PS3 and get a response. PC1 and LAPTOP1 are unable to ping each other by ip address unless I ping by their name (which bizarrely shows that it is pinging via the IPv6 address). Also, to confirm this both PC1 and LAPTOP1 can ping each other via the long IPv6 address that they both have so they can obviously see each other just not via IPv4. I've disabled the firewalls on both machines as well to rule that out. I don't really know what IPv6 is used for and I've tried disabling it on both machines but all that happens then is that neither machine can see each other at all then. Does anyone have any idea of what may be stopping them seeing each other, any ways I can look at fixing this, or any network tools that may help identify where it is failing? Thanks, Mark

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• ASA 5505 VPN setup. VPN works but still unable to reach devices in the inside network.

  - by chickenloop

  I've setup a Remote Access VPN on my Cisco ASA 5505. I'm able to connect to my ASA via my phone or the Cisco client, but I'm unable to reach devices in my inside LAN when connected via VPN. The setup is the following: Inside Network : 10.0.0.0/24 VPN_POOL: 172.16.0.0/24 Outside Network: 192.168.1.0/24 ASA is not the perimeter router, there is another device on the 192.168.1.0/24 network which is connected to my cable provider. Obviously UDP port 500 and 4500 are forwarded to the ASA's outside interface. Everything works perfectly, besides the VPN stuff. Config: interface Vlan1 nameif inside security-level 100 ip address 10.0.0.254 255.255.255.0 interface Vlan2 description Outside Interface nameif outside security-level 0 address 192.168.1.254 255.255.255.0 object network VPNPOOL subnet 172.16.0.0 255.255.255.0 object network INSIDE_LAN subnet 10.0.0.0 255.255.255.0 Then the exempt NAT rule. nat (inside,outside) source static INSIDE_LAN INSIDE_LAN destination static VPNPOOL VPNPOOL I don't think that the problem is with the VPN config, as I can successfully establish the VPN connection, but just in case I post it here: group-policy ZSOCA_ASA internal group-policy ZSOCA_ASA attributes vpn-tunnel-protocol ikev1 split-tunnel-policy tunnelspecified split-tunnel-network-list value Split-Tunnel default-domain value default.domain.invalid tunnel-group ZSOCA_ASA type remote-access tunnel-group ZSOCA_ASA general-attributes address-pool VPNPOOL default-group-policy ZSOCA_ASA tunnel-group ZSOCA_ASA ipsec-attributes ikev1 pre-shared-key ***** Any ideas are welcome. Regards.

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• Can't access phpMyAdmin because of host, username and password

  - by Engprof

  everyone. When I try to access phpMyAdmin on Uniform Server I get the following error messages: " #1045 - Access denied for user 'root'@'localhost' (using password: YES) " " phpMyAdmin tried to connect to the MySQL server, and the server rejected the connection. You should check the host, username and password in your configuration and make sure that they correspond to the information given by the administrator of the MySQL server. " The funny thing is my username and password are both set to "root" and I have changed the IP address in the httpd.conf file to my Unique IP adddress, so I still don't know what the problem is. Could somebody please help me out? Any help would be much appreciated.

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• How to set up a subdomain in nsd3

  - by qliq

  nsd3 is very little-known but super-lightweight and stable DNS server which makes it a great alternative to bind9 be used on low-end boxes. There is a very good tutorial here that describe how to set it up. My problem is that I need to set up a subdomain subd1.example.com that will be severed on another VPS. I tried to add subdmn1.mymaindomain.com. IN 1.2.3.5 (Assuming that my destination IP is 1.2.3.5) Then I nsdc rebuild service nsd3 restart However the subdmn1.mymaindomain.com fails to resolve to the IP. Any clues will be much appreciated.

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• ubuntu server refusing connections via port forwarding

  - by Matt

  Getting some really weird behavior from our Ubuntu server... it's behind a Verizon router firewall with port forwarding (port 8080 to port 80 on the server), and we've been having issues accessing it via this external IP. From within the network, it appears to respond normally (I can access it via web browser and SSH), but refuses connections through port forwarding (using our static external IP). The strangest thing is that it actually responds to external port-forwarded connections right after being restarted, but quickly lapses back into this pattern of refusing external connections. I'm a bit of a server newbie (I'm actually a programmer in a small startup that just lost their server ops guy, urgh) so this is all trial by fire for me. Does anyone have any advice on what could be going wrong here? Any help would be appreciated, thanks.

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• Free firewall for Windows Server 2003

  - by n00b_Admin

  We have a Windows Server 2003 R2 Machine here at work that I need to ensure is accessible only from specific set of IP Addresses. The Server is on a LAN and I am aware that one of the possible solutions maybe limit access to the Server's VLAN. However that is not feasible at the moment. I've been searching for a firewall that could do this, Windows' Firewall is pretty limited and I don't see an option in it to limit incoming data based on Source IP addresses. Most free firewalls like Comodo and ZoneAlarm don't work on Windows Server. Any ideas on how to accomplish this would be of great help. Thanks in advance.

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• Allow connection to certain port from specified domain

  - by Scott

  I got two domains, which are pointing on the same IP address, I can use both to connect to the server or certain port (TeamSpeak), the problem is that I would like the only one domain from those two to be working while connecting to a certain port. Eg. example.com points at the 11.22.33.44 -- allow connection to the certain port from this domain. sample.com points at the 11.22.33.44 -- disallow connection to the port specified above from this domain. I know this would be possible for the IP addresses, but would it be possible for the domains?

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• connecting hostname to server

  - by Michael Ropy

  I have an ubuntu server installed on my server with virtualmin webmin. everything is good the server itself....I can connect to localhost and the virtualmin manager (http://localhost:10000). the problem is, I can't connect to it from a client computer. For example when I enter the IP address of the server, its shows me 403 forbidden error (sometimes its shows the homepage right)...but the virtualmin manager could not open... if my website is example.com with this ip: xxx.xxx.xxx.xxx, i can't connect to example.com:10000 or xxx.xxx.xxx.xxx:10000 what should I do?

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• Turn on PC power remotely through the Internet?

  - by W.N.

  I use SVN for my work at home and office, but I usually forget to commit the changes before shutdown. Therefore, I wish I could turn on my home/office PC at office/home. I already have TeamViewer installed on both PCs, so it will be okay as soon as the power is turned on. I have read many articles about this, I found both my PC and office computers support Wake-on-LAN. However, I don't know much about other config. And I need to turn on my computers through the Internet, not on LAN. My office Internet connection has static IP, however, my home Internet connection has dynamic IP, it changes as soon as I reset the modem, but it is not a big problem, I rarely turn the Internet modem off. And I don't have privilege to config office Internet connection, but I have Administration privilege on both PCs. Please give me details steps to turn on my office PC from home, and turn on my home PC from office.

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• Iis multiple domain binding

  - by user2979484

  I've a server with vshpere running and one vm with Windows 2008 r2. I'm hosting a website on this vm. But I want to try to add another domain. Now I have 3 ip-adresses. 1 for vspehere. 1 for vm. 1 for 2nd domain. When I add a new site and edit the bindings to the last ip-adress (2nd domain) it doesn't work. I've added also a new network adapter on vsphere and edited in the windows network adapter. Could anyone help me out with this. Sorry for my bad english I hope you will understand it.

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• Create and redirect subdomain for a parked domain?

  - by Steve

  I have a domain parked.com which is parked onto real.com. I have created the subdomain m.parked.com by editing parked.com's named file: m 14400 IN A ip-address www.m 14400 IN A ip-address This works somewhat: if I go to m.parked.com it redirects to http://m.parked.com/cgi-sys/defaultwebpage.cgi This is my question: I would like to redirect this subdomain to real.com as that is the domain it is parked on. I do not know how to do this as parked.com does not have its own .htaccess file, etc. (due to it being a parked domain) so I can't do any mod_rewrite magic. Can anyone help me? Thanks EDIT: Clarification

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• How to forward traffic using iptables rules?

  - by ProbablePattern

  I am new to iptables and I have been doing Google searches for a few days now without finding a good solution to this problem. I have computer A with a public ip address (say 192.0.2.1) that can access the Internet unrestricted. I have another computer B with a private ip address (192.168.1.1) that can only access computer A. How do I use iptables to forward network traffic from B through A to the Internet? I need to use http, ftp, and https in order to use apt-get with sudo. Both computers run Ubuntu linux. I have tried using Squid but I think it is far too complicated for what I need to do.

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• Postgres Remote Access

  - by boot-baby-boot

  I am trying to connect to postgres remotely.I have followed this tutorial http://www.cyberciti.biz/faq/howto-fedora-linux-install-postgresql-server/ and have executed the following commands to see if the remote access is possible. [root@printmyworld ~]# egrep -i "(listen_addresses|port|tcpip_socket).*=.+" /var /lib/pgsql/data/postgresql.conf #listen_addresses = '*' # what IP address(es) to listen on; #port = 5432 [root@printmyworld ~]# lsof +c0 -anPiTCP -upostgres COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME postmaster 9323 postgres 3u IPv4 2875987353 TCP 127.0.0.1:5432 (LISTEN ) postmaster 9323 postgres 4u IPv6 2875987354 TCP [::1]:5432 (LISTEN) I am suspicious of this line: postmaster 9323 postgres 3u IPv4 2875987353 TCP 127.0.0.1:5432 (LISTEN My server ip address is 1yy.000.1xx.000 .Should it be 1yy.000.1xx.000:5432

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• Linux: Three default gateways?

  - by Daniel

  My server has three default gateways, how can that be? Shouldn't there be one default gw? I have three NICs, each attached to a separate subnet: server1:~# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.5.0.0 * 255.255.255.224 U 0 0 0 eth3 localnet * 255.255.255.224 U 0 0 0 eth0 192.168.8.0 * 255.255.255.192 U 0 0 0 eth1 default 10.5.0.1 0.0.0.0 UG 0 0 0 eth3 default 192.168.8.1 0.0.0.0 UG 0 0 0 eth1 default 10.1.0.1 0.0.0.0 UG 0 0 0 eth0 Sometimes, I can't ping a host on the Internet, sometimes I can. What I want is traffic to the Internet (0.0.0.0) routed through a specific NIC. Can I just add a route for 0.0.0.0 and default gw to one of the eth0-3 interfaces? Will it break my connection? I'm using Debian, here is my /etc/network/interfaces: # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface allow-hotplug eth0 iface eth0 inet static address 10.1.0.4 netmask 255.255.255.224 network 10.1.0.0 broadcast 10.1.0.31 gateway 10.1.0.1 allow-hotplug eth1 iface eth1 inet static address 192.168.8.4 netmask 255.255.255.192 network 192.168.8.0 broadcast 192.168.8.63 gateway 192.168.8.1 allow-hotplug eth3 iface eth3 inet static address 10.5.0.4 netmask 255.255.255.224 network 10.5.0.0 broadcast 10.5.0.31 gateway 10.5.0.1

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• Mac Snow Leopard Server DNS

  - by panomedia

  I have a Tomcat-driven application on my Windows server that I am planning to move to a MacMiniServer. Before I do this, I want to fully test the transition for licensing purposes. I have a Fire drive setup with Snow Leopard Server and the base app runs just fine BUT I need to be able to resolve the URL to my domain and not localhost. So, I figured I would setup panomedia.net in the DNS Server and also create an A record to my internal network IP so www.panomedia.net would dish out the same thing as localhost. The problem is: The Tomcat web app starts up going through panomedia.local and not through www.panomedia.net and My main network preference panel is still looking at my Comcast DNS search providers even though I put my local IP address as the only DNS Server and Search provider. I need to test this via an actual domain name before I commit to a 400GB data move. Can anyone help?

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