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• Internal Linux machine with Apache that I can access by IP address but not computer name

  - by Parris

  I have an Ubuntu machine running LAMP. While on the machine I can type localhost or the computers name to access htdocs. From another machine I can only access the machine via its IP Address. This just started happening recently when someone rearranged the network cables and removed a hub sitting between the machine and the network, which makes me think it wasn't all the stable to begin with anyways. Any suggestions on where I should start looking?

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• Benefits to private networks between virtual machines on an ESXi host?

  - by arex1337

  I'm planning this development environment with a few database servers, and originally thought I would have a few private networks. I then thought it might be unnecessary as the ESXi cluster already provides redundancy with 4 NICs (in my case) and should manage the network traffic pretty intelligently, right? Two private networks Zero private networks What are the advantages/disadvantages between the two shown configurations - on an ESXi 4.1 host?

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• Cannot connect to FTP server from external host

  - by h3.

  I have a FTP server (vsftpd) setuped on a Linux box (Ubuntu server). When I try to connect with a computer on the same network everything works fine as expected. But as soon the IP is external it won't connect.. I first assumed the port was blocked, but then: localserver:$ sudo tail -f /var/log/vsftpd.log Wed Jan 13 14:21:17 2010 [pid 2407] CONNECT: Client "xxx.xxx.107.4" remotemachine:$ netcat svn-motion.no-ip.biz 21 220 FTP Server And it hangs there. Do any ports other than 21 need to be open?

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• Help with routing table

  - by user68752

  I have tried to find the answer to my question but not really found a clean and easy solution. I have a box (Ubuntu headless 10.04.1 server, with one Ethernet port) on LAN behind a router (running m0n0wall), that I have successfully installed a PPTP device (ppp0) on, this is working flawlessly (following this link) The thing is I want this box to route all it's internet traffic through the VPN tunnel (ppp0 device) but also being able to access the local LAN on 192.168.1.* subnet. I've succeeded a bit with this, but my problem right now is that I have port forwards (e.g. SSH) done in the m0n0wall pointing to this specific box which forces me to do "add routes" to all boxes that want to access this machine through this specific port. For instance a machine with ip xyz.xyz.xyz.xyz needs to have a static route setup in the routing table on the box to be able to access the box. This is the result of route -n xxx.xxx.137.2 192.168.1.1 255.255.255.255 UGH 0 0 0 eth0 xxx.xxx.137.2 0.0.0.0 255.255.255.255 UH 0 0 0 ppp0 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 yyy.yyy.0.0 192.168.1.1 255.255.0.0 UG 0 0 0 eth0 0.0.0.0 0.0.0.0 0.0.0.0 U 0 0 0 ppp0 Where xxx is the IPs provided from VPN server. yyy.yyy.0.0 is a net that i want to have access to the box, without this I can't access the box from outside the LAN (via port-forwards done in router software, m0n0wall) is there away round this ugly solution?

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• Weird WLAN connection

  - by tuelsch

  I assembled my first computer on my own. As I realised it had no WLAN (AsRock Z77 Extreme 4m) I bought a WLAN stick (ZyXel NWD 2105), plugged it in, started the setup from the CD and it worked, until I restarted the PC. That's when the problems started. The stick is able to connect to the router (P-660HN-F1Z) and the connection is stable, but not the internet access. In estimately 1 minute intervals there might be a short connection timeframe and dropbox or windows update are able to download some data, but as soon as I try to open a website the internet access is away. Note that the connection to the router does not shut down and remains stable at around 80-90%. The problem is definetly located on my pc, because with my laptop and phone the connection is stable and fast. Because I was so pissed off, I bought a EW-7612PIn V2 (PCI-E WLAN adapter), same problem. Now the weird thing is, if I don't use the PC for about 2 days, start it up, there is internet access (happened with both the stick and the PCI-E card). A bit slow, but it does not get away just like that, until I shut it down. Then, no matter how many times I restart, it won't come back. I googled a lot but now I'm at the end with my latin. Has anyone had a similar problem and resolved it? Technical details: Motherboard: AsRock Z77 Extreme 4M OS: Windows 7 professional 64bit Stick: Zyxel wireless N adapter NWD2105 PCI-E card: Edimax EW-7612PIn V2 Router: ZyXel P-660HN-F1Z Windows-IP-Konfiguration Hostname . . . . . . . . . . . . : xyz Primäres DNS-Suffix . . . . . . . : Knotentyp . . . . . . . . . . . . : Hybrid IP-Routing aktiviert . . . . . . : Nein WINS-Proxy aktiviert . . . . . . : Nein Drahtlos-LAN-Adapter Drahtlosnetzwerkverbindung 5: Medienstatus. . . . . . . . . . . : Medium getrennt Verbindungsspezifisches DNS-Suffix: Beschreibung. . . . . . . . . . . : Microsoft Virtual WiFi Miniport Adapter # 3 Physikalische Adresse . . . . . . : 80-1F-02-61-C0-A6 DHCP aktiviert. . . . . . . . . . : Ja Autokonfiguration aktiviert . . . : Ja Drahtlos-LAN-Adapter Drahtlosnetzwerkverbindung 4: Verbindungsspezifisches DNS-Suffix: Beschreibung. . . . . . . . . . . : Edimax 802.11n Wireless Adapter Physikalische Adresse . . . . . . : 80-1F-02-61-C0-A6 DHCP aktiviert. . . . . . . . . . : Ja Autokonfiguration aktiviert . . . : Ja Verbindungslokale IPv6-Adresse . : fe80::38d2:f489:726d:1fb5%17(Bevorzugt) IPv4-Adresse . . . . . . . . . . : 192.168.1.41(Bevorzugt) Subnetzmaske . . . . . . . . . . : 255.255.255.0 Lease erhalten. . . . . . . . . . : Donnerstag, 15. November 2012 10:51:05 Lease läuft ab. . . . . . . . . . : Sonntag, 18. November 2012 10:51:18 Standardgateway . . . . . . . . . : 192.168.1.1 DHCP-Server . . . . . . . . . . . : 192.168.1.1 DHCPv6-IAID . . . . . . . . . . . : 578821890 DHCPv6-Client-DUID. . . . . . . . : 00-01-00-01-17-FF-D5-FE-BC-5F-F4-48-FC-4B DNS-Server . . . . . . . . . . . : 91.233.182.2 194.230.1.39 NetBIOS über TCP/IP . . . . . . . : Aktiviert Tunneladapter isatap.{263BEB98-344B-435C-888F-1B15B97C3AC1}: Medienstatus. . . . . . . . . . . : Medium getrennt Verbindungsspezifisches DNS-Suffix: Beschreibung. . . . . . . . . . . : Microsoft-ISATAP-Adapter Physikalische Adresse . . . . . . : 00-00-00-00-00-00-00-E0 DHCP aktiviert. . . . . . . . . . : Nein Autokonfiguration aktiviert . . . : Ja Tunneladapter Teredo Tunneling Pseudo-Interface: Verbindungsspezifisches DNS-Suffix: Beschreibung. . . . . . . . . . . : Teredo Tunneling Pseudo-Interface Physikalische Adresse . . . . . . : 00-00-00-00-00-00-00-E0 DHCP aktiviert. . . . . . . . . . : Nein Autokonfiguration aktiviert . . . : Ja IPv6-Adresse. . . . . . . . . . . : 2001:0:9d38:6ab8:209c:2944:3f57:fed6(Bevo rzugt) Verbindungslokale IPv6-Adresse . : fe80::209c:2944:3f57:fed6%11(Bevorzugt) Standardgateway . . . . . . . . . : :: NetBIOS über TCP/IP . . . . . . . : Deaktiviert C:\Users\xyz>ping 192.168.1.1 Ping wird ausgeführt für 192.168.1.1 mit 32 Bytes Daten: Antwort von 192.168.1.1: Bytes=32 Zeit=2ms TTL=254 Antwort von 192.168.1.1: Bytes=32 Zeit=2ms TTL=254 Antwort von 192.168.1.1: Bytes=32 Zeit=2ms TTL=254 Antwort von 192.168.1.1: Bytes=32 Zeit=2ms TTL=254 Ping-Statistik für 192.168.1.1: Pakete: Gesendet = 4, Empfangen = 4, Verloren = 0 (0% Verlust), Ca. Zeitangaben in Millisek.: Minimum = 2ms, Maximum = 2ms, Mittelwert = 2ms

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• How do I recover my router password without resetting it?

  - by Pacerier

  I want to know the password of my router. The default username and pass isn't working. I've read this thread i forgot my wireless router password. what do i do . . however it tells me to reset the router (I do not wish to reset the router to factory settings) This is my router: Linksys Wireless-N Home Router WRT120N I'm thinking there's some way we could get the password (or bypass the need to) that we need to enter 192.168.1.1?

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• Get the MAC addresses of all the machines connected to a LAN when NO machines have got an IP address yet

  - by JtheRocker

  Here is the real scenario. I have say 4 machines not having any IP address yet connected to a switch. In one of the machines (OS=CentOS), I would install a DHCP server and would provide the other machines IP addresses. Prior to assigning them IP addresses, I need to get the MAC address of each of the machines that I would assign IP addresses to. So, my question here is how to I get the MAC addresses of all the machines connected to a switch when NO machine has got any IP address yet? It's mandatory for my use case that I won't be having any IP addresses before the MAC addresses. -Thanks

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• What is the best way to setup a heartbeat agent for failover between two VMs?

  - by EGr

  I have two VMs in VirtualBox that use NAT for their network adapters. They are both getting the same IP address, so I will need to reconfigure that; but knowing that, is it possible to set up a heartbeat agent to failover an apache server if one of the two VMs go down? The way I pictured it would be that the webserver would be able to be accessed externally via :80. No matter what VM was running, I would be able to access the website at that IP/port since failover would be setup. I'm running into trouble setting up IPs when the network adapters are set to NAT, and people have told me that I shouldn't be setting the IPs in this configuration. So what should I do to achieve what I'm looking for? Is it even feasible?

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• Cannot connect to MySQL on RDS (Amazon Web Services) from my laptop

  - by Bruno Reis

  I'm having some trouble connecting to a MySQL 5.1 server on an RDS instance on AWS from my laptop. The detailed description of the problem is here: https://forums.aws.amazon.com/thread.jspa?messageID=323397 In short: I have 2 MySQL servers, both with the same db configuration and firewall (security group) configuration. One of them works fine: I can connect to it from my EC2 instances (ie, from inside the AWS cloud) and from my laptop. The other one doesn't: I can connect from my EC2 instances but not from my laptop. The symptom: a connection attempt from my laptop just hangs, and then times out, as if there was a firewall blocking me (ie, silently dropping my SYN packets). I must say that everything has been working fine for a very long time, and this problem began suddenly, 3 days ago, without any modifications to DB parameters or the security groups. My current analysis of the situation: The firewall (ie, security group) cannot be the problem: both MySQL servers share the same firewall configuration -- I can connect to one of them but not to the other. Later on, I even added a rule to allow inbound connections from 0.0.0.0/0 (ie, I turned off the firewall), and nothing. Oh, I also created a new, fresh security group and changed this instance's SG to the new one (to which I first added my ip address, and then 0.0.0.0/0) but still nothing. The credentials cannot be the problem: I use the same from my laptop and from my EC2 instances -- and the user (which is what Amazon calls master user), in the database, has a host of '%'. MySQL is not blocking my IP due to, say, too many failed connection attemps: I've FLUSH HOSTS on the database, and also I tried to connect using many different source IP addresses, even from all around the world through a VPN proxy service. What could I be missing? I'm asking here because it's been about 36 hours since I've posted on AWS forums but got no answer at all over there... someone here might have a solution! Any input is really appreciated, I'm out of ideas. Thanks!

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• Hard Disk based storage library

  - by Ryan M.

  We have a Tandberg T24 tape device to handle all of our long term backups right now. We decided that we're not backing up nearly everything that we would like to and that we still have a lot of vulnerabilities. To get to where we want to be, we're going to have to back up a lot more servers than we're currently doing. All of our internal servers have some sort of directly attached drive (I.e. LaCie Raid box or a simple portable hard drive) doing backups, but what we want to do is get those backups off-site. The current tape drive is directly attached via SCSI to a Windows Server 2008 File Server. So to back up anything to tape, it has to be funneled through the File Server. With the current increase that we have planned, I don't think that funneling everything through the File Server is the right course of action and I'm thinking that maybe a second backup device would be more appropriate. I would like your input on a couple of ideas. 1) Doing HDD instead of tape. Tape is hard to deal with. We have a regular rotation cycle, so they don't need years and years of shelf life, so I'm wondering if something HDD-based would be better. 2) Something accessible over the network. Instead of having the device directly attached to one specific machine, have it available to all the servers over the network. Our File Server is a 12-disk raid 6 set up.. I was thinking something like that, but with no raid involved, all disks are stand alone so they can be used/installed/removed on an individual basis. Does any such thing exist? Thanks for your ideas. I'm really interested to hear about some of the solutions you guys are using..

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• Extend university wifi network

  - by asfasdoiuh ouhouhouh

  i live in a university campus and i can get wifi signal on the outside of my window but not in the house. The solution i use at the moment is a usb wifi dongle outside connected to my laptop but the lack of an internal antenna make the connection quite unreliable at times. So i was trying to find another solution to improve the reception of my network. One idea is to setup a router on the outside (in a place with stronger signal) and redirect the connection inside the house with an ethernet cable but the problem is that our Uni Wifi is managed by a capitve portal (BlueSocket with DNS redirection to login page) and the authentication has to happen on the mac address that connect to the net (so the client appliance in this case). If I use a router with Mac-Clone capability i will be able to be redirected trough the captive portal on my laptop computer and login from there or i need to setup my router to fill in the login page by itself? There are other hardware/software solutions i can use to get what i want?

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• Computer Loses connection to router

  - by ajon

  I have a new Windows 8 Dell XPS desktop computer at work. It has a Dell Wireless 1703 802.11 b/g/n (2.4ghz) wireless adapter. sporadically throughout the day I lose internet connectivity. When I click on the wireless system tray icon, my companies router does not appear in the list. No other computer on the network is losing connection, only this one. I don't even know what to check. Could it be an ip conflict that causes me to get booted off? (I use DHCP), but why wouldn't my computer be able to see the network. The next time it happens I will see what happens when I try to access the router directly.

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• Remove Windows 7's limitation on number of concurrent tcp connections (http web requests)

  - by Ghita

  I have an application that tries to open as many http requests as possible (in order to stress test a proxy implementation) It seems to me that Win7 (SP1) may have a limitation on number of concurrent opened connection (it may be the so called half-open state if I'm not wrong). Is there something I can do for client ? and also I test using a vista PC that acts as a proxy server. It would be great if I could configure it to sustain at least 50 new connections initiated / second on client side and many more on server. I made the modification according to this technet article by setting TcpNumConnections = 150 but it doesn't make a difference. I still only see about 20 tcp sockets associated with my http client by using tcpview.

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• How to make XAMPP virtual hosts accessible to VM's and other computers on LAN?

  - by martin's

  XAMPP running on Vista 64 Ultimate dev machine (don't think it matters). Machine / Browser configuration Safari, Firefox, Chrome and IE9 on dev machine IE7 and IE8 on separate XP Pro VM's (VMWare on dev machine) IE10 and Chrome on Windows 8 VM (VMware on dev machine) Safari, Firefox and Chrome running on a iMac (same network as dev) Safari, Firefox and Chrome running on a couple of Mac Pro's (same network as dev) IE7, IE8, IE9 running on other PC's on the same network as dev machine Development Configuration Multiple virtual hosts for different projects .local fake TLD for development No firewall restrictions on dev machine for Apache Some sites have .htaccess mapping www to non-www Port 80 is open in the dev machine's firewall Problem XAMPP local home page (http://192.168.1.98/xampp/) can be accessed from everywhere, real or virtual, by IP All .local sites can be accessed from the browsers on the dev machine. All .local sites can be accessed form the browsers in the XP VM's. Some .local sites cannot be accessed from IE10 or Chrome on the W8 VM Sites that cannot be accessed from W8 VM have a minimal .htaccess file No .local sites can be accessed from ANY machine (PC or Mac) on the LAN hosts on dev machine (relevant excerpt) 127.0.0.1 site1.local 127.0.0.1 site2.local 127.0.0.1 site3.local 127.0.0.1 site4.local 127.0.0.1 site5.local 127.0.0.1 site6.local 127.0.0.1 site7.local 127.0.0.1 site8.local 127.0.0.1 site9.local 192.168.1.98 site1.local 192.168.1.98 site2.local 192.168.1.98 site3.local 192.168.1.98 site4.local 192.168.1.98 site5.local 192.168.1.98 site6.local 192.168.1.98 site7.local 192.168.1.98 site8.local 192.168.1.98 site9.local httpd-vhosts.conf on dev machine (relevant excerpt) NameVirtualHost *:80 <VirtualHost *:80> ServerName localhost ServerAlias localhost *.localhost.* DocumentRoot D:/xampp/htdocs </VirtualHost> # ======================================== site1.local <VirtualHost *:80> ServerName site1.local ServerAlias site1.local *.site1.local DocumentRoot D:/xampp-sites/site1/public_html ErrorLog D:/xampp-sites/site1/logs/access.log CustomLog D:/xampp-sites/site1/logs/error.log combined <Directory D:/xampp-sites/site1> Options Indexes FollowSymLinks AllowOverride All Require all granted </Directory> </VirtualHost> NOTE: The above <VirtualHost *:80> block is repeated for each of the nine virtual hosts in the file, no sense in posting it here. hosts on all VM's and physical machines on the network (relevant excerpt) 127.0.0.1 localhost ::1 localhost 192.168.1.98 site1.local 192.168.1.98 site2.local 192.168.1.98 site3.local 192.168.1.98 site4.local 192.168.1.98 site5.local 192.168.1.98 site6.local 192.168.1.98 site7.local 192.168.1.98 site8.local 192.168.1.98 site9.local None of the VM's have any firewall blocks on http traffic. They can reach any site on the real Internet. The same is true of the real machines on the network. The biggest puzzle perhaps is that the W8 VM actually DOES reach some of the virtual hosts. It does NOT reach site2, site6 and site 9, all of which have this minimal .htaccess file. .htaccess file <IfModule mod_rewrite.c> RewriteEngine On RewriteCond %{HTTP_HOST} !^www\. RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L] </IfModule> Adding this file to any of the virtual hosts that do work on the W8 VM will break the site (only for W8 VM, not the XP VM's) and require a cache flush on the W8 VM before it will see the site again after deleting the file. Regardless of whether a .htaccess file exists or not, no machine on the same LAN can access anything other than the XAMPP home page via IP. Even with hosts files on all machines. I can ping any virtual host from any machine on the network and get a response from the correct IP address. I can't see anything in out Netgear router that might prevent one machine from reaching the other. Besides, once the local hosts file resolves to an ip address that's all that goes out onto the local network. I've gone through an extensive number of posts on both SO and as the result of Google searches. I can't say that I have found anything definitive anywhere.

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• Why just splitting an Ethernet cable does not work?

  - by Sin Jeong-hun

  I thought the Ethernet is logically one-line communication bus (for argument's sake, I am excluding hubs). All machines attached in the bus hears the same signals and the machines themselves try to avoid collisions by randomly backing off. http://computer.howstuffworks.com/ethernet6.htm If so, why splitting one Ethernet line from my home router into two and connecting two computers would not work? Why do I have to add a switch to it? *What the Internet said would not work. [4 port home router] ------[one Ethernet cable]-----[simple splitter]======[two computers] *What the Internet said I should do [4 port home router] ------[one Ethernet cable]-----[switch]======[two computers] Is this because of the signal degradation (reduced electric current)? Thank you for all the answers! The reason why I did not just use the two ports of my home router is... The 4-port gigabit router is in my room and I had put a computer in another room (also my room, though). Since wired network is far more reliable and secure, I had bought a long Ethernet cable and and connected the computer to the router. Now I was thinking about adding another computer to that room. I could buy another long Ethernet cable, but then there will be two cables between the rooms. The one line already is a minor annoyance, so I thought if I could share the one line between the two computers in that room. A switch would work, but it requires power and is a little bit pricey. That is why I wondered why it would not work to simply split the physical Ethernet cable. Apparently I do not completely understand how Ethernet and a switch work. I just have some bit of knowledge I heard in my college class.

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• How do I change the Admin password on a Ubee DVW3201B?

  - by Iszi

  I must admit that I feel rather foolish having to ask this. I recently switched ISPs, and the new one gave us a Ubee DVW3201B as our home gateway. I want to change the Administrator username/password from the defaults, but I've been having some difficulty. Every time, after I save the new username and password, I'm prompted to re-authenticate to the administration interface. It fails no matter what I try. I've tried using: New username / New password Default username / New password Default username / Default password None of the above works. This has happened twice now, with my only recourse after failure being to do a reset to factory defaults (press and hold the hard reset button for 10 seconds). Is there something I'm missing?

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• Examples of applications where messages are guaranteed to turn up imediately

  - by James Hay

  I'm trying to find an example to show where data is sent from somewhere, whether manually or automatically, and is received IMMEDIATELY by the recipient, (doesn't matter whether we're talking mobile, desktop or whatever). An even better example would be where there were multiple recipients for the same message. It doesn't matter what the data is or the context it's used in, only the immediacy of receiving it. I was thinking that there might be some example in finance and the stock markets, but I haven't been able to find any through googling. IM clients are a great example of this and I think I'm basically looking for examples of applications that communicate over sockets. If anyone works on applications of this nature or knows of particular implementations, can you give me a quick run down of the use case and if it's commercial software the name of the software. This is all basically for research purposes so doesn't have to be particularly detailed. If anyone can help, thanks.

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• Stack Managed Switches over a distance

  - by Joel Coel

  We have several buildings with stacked switches, where the distance between the stacked units is considerable... separate floors, or at opposite ends of a hallway. They are 3Com switches that stack using cat6 cabling. These switches are coming up on 12 years old now, and as I look around at replacements it seems no one supports this scenario any more. Stacking switches want to use fiber links (it more for me to run and terminate the fiber stacking cables than to purchase the switch) or other custom cables that seem only intended to jump up to the next unit in a rack. What have others done to support stacking over a distance? I'm considering breaking up the stacked switches into separate managed entities and just bridging from the root switch in the buildings, but I'd really like to avoid that for what I hope are obvious reason. The closest thing I've found are from netgear that use hdmi cables for the stacking connection... I could try to support that by running an additional cat6 line and re-terminating both links into a single hdmi port, but I have concerns over that approach as well.

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• Gentoo box can't cURL or ping after restarting net.eth1

  - by Curlybraces

  Hi all, the following is completely baffling me. We currently have a gentoo box which acts as our LAMP, DNS, DHCP server. This is assigned a static IP on the network. This server is connected directly to the internet via a BT BusinessHub Router. The server is also connected to a patch panel/switch port which connects the remaining office (around 10 PC's) to the server. Everything has been plain sailing until the other day when the server was restarted. For some reason now only portions of network accessibility is available depending on which ethernet device was last restarted. Restarting net.eth0 allows the office server to cURL, ping, etc but stops all networked PC's from accessing the internet. Then restarting net.eth1 restores all internet to the network but stops the server from curling, pinging, etc again. However, even when the server can't ping, curl, etc, I can still remote SSH and remote MySQL connect from the server command line to other external servers that we own. Here's my route map (router is 192.168.1.254): Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo 0.0.0.0 192.168.1.254 0.0.0.0 UG 0 0 0 eth1 Here's my /etc/conf.d/net: iface_eth0="192.168.1.99 broadcast 192.168.1.255 netmask 255.255.255.0" iface_eth1="dhcp" None of the above have ever been changed however. Things have just ceased to operate correctly, which makes me think it's a freshly added Iptables rule. Here's the Iptables Filter table: Chain INPUT (policy ACCEPT) target prot opt source destination DROP tcp -- ##.##.##.## anywhere tcp dpt:ssh ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT all -- anywhere anywhere ACCEPT tcp -- anywhere anywhere tcp dpt:2199 ACCEPT tcp -- anywhere anywhere tcp dpt:3199 ACCEPT tcp -- ##.###.###.## anywhere tcp dpt:http ACCEPT tcp -- ###.###.##.## anywhere tcp dpt:2199 ACCEPT tcp -- ##.###.###.### anywhere tcp dpt:http ACCEPT tcp -- ##.###.##.## anywhere tcp dpt:http ACCEPT tcp -- ##.###.###.### anywhere tcp dpt:3128 ACCEPT udp -- ##.###.###.### anywhere udp dpt:3128 ACCEPT tcp -- ##.###.###.### anywhere tcp dpt:http ACCEPT tcp -- ##.###.###.### anywhere tcp dpt:https Chain FORWARD (policy ACCEPT) target prot opt source destination ACCEPT all -- anywhere ##.###.###.## DROP all -- anywhere ##.###.###.## ACCEPT all -- anywhere anywhere state NEW,ESTABLISHED Chain OUTPUT (policy ACCEPT) target prot opt source destination ACCEPT udp -- anywhere anywhere udp spt:2199 ACCEPT udp -- anywhere anywhere udp spt:4817 ACCEPT udp -- anywhere anywhere udp spt:4819 ACCEPT udp -- anywhere anywhere udp spt:3199 Help gratefully appreciated.

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• WDS (Wireless Distribution System) not work [migrated]

  - by xdevel2000

  I've a dlink di-524 as main router (192.168.0.1) connected to Internet and a second router (192.168.0.2), a tplink wr841n, with WDS enabled and correctly configured to "join" with dlink. After I connect via wireless a laptop (192.168.0.100) to tplink and both work good but with the laptop I can't go to Internet. It seems as WDS not work. With the laptop I can only ping the tplink but other ping (the dlink or other LAN computer not responding). What's the problem? Perhaps also the dlink must have the WDS option? Thanks.

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• How do I tell Windows to use 802.11 in preference to 3G?

  - by Jon Skeet

  I have a Samsung NC-10 netbook which I take to work every day. Most of the time I use it just on the train/bus, but I also use it at work and home. It has a built-in 3G card which I want to use when travelling, but I'd prefer to use wifi when I'm at work or home, for obvious reasons. Unfortunately, if the 3G connection is up, Windows appears to use that in preference to wifi. Starting up and shutting down the 3G modem is a bit of a pain - it's not hard as such, just a bit inconvenient. Ideally I'd like it to always be up, and even have the connection itself up all the time, but without routing traffic through it if there's a wifi connection up. This is what my Android phone does, for example. Is there somewhere in Windows which lets me express an ordering for network interfaces? I suspect the routing table may be relevant, but it's a bit of a pain to mess around with. I'd really expect there to be a simple GUI way of setting this up - after all, it would equally be useful when dealing with wired vs wifi connections. I'm currently using Windows XP Home, but Windows 7 answers would also be useful as I'll be migrating soon.

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• Backtrack, Wi-Fi not working

  - by hradecek

  I've installed Backtrack 5R3 KDE, and I realized that my wireless is not working, but wired is working fine. Here's the lshw output: *-network description: Ethernet interface product: RTL8101E/RTL8102E PCI Express Fast Ethernet controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: pci@0000:02:00.0 logical name: eth0 version: 05 serial: 04:7d:7b:b7:46:f8 size: 100MB/s capacity: 100MB/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=full firmware=rtl_nic/rtl8105e-1.fw ip=192.168.2.2 latency=0 link=yes multicast=yes port=MII speed=100MB/s resources: irq:42 ioport:2000(size=256) memory:f0404000-f0404fff memory:f0400000-f0403fff lspci output: 00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) 00:14.0 USB Controller: Intel Corporation Panther Point USB xHCI Host Controller (rev 04) 00:16.0 Communication controller: Intel Corporation Panther Point MEI Controller #1 (rev 04) 00:1a.0 USB Controller: Intel Corporation Panther Point USB Enhanced Host Controller #2 (rev 04) 00:1b.0 Audio device: Intel Corporation Panther Point High Definition Audio Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 1 (rev c4) 00:1c.1 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 2 (rev c4) 00:1d.0 USB Controller: Intel Corporation Panther Point USB Enhanced Host Controller #1 (rev 04) 00:1f.0 ISA bridge: Intel Corporation Panther Point LPC Controller (rev 04) 00:1f.2 SATA controller: Intel Corporation Panther Point 6 port SATA AHCI Controller (rev 04) 00:1f.3 SMBus: Intel Corporation Panther Point SMBus Controller (rev 04) 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 05)

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• VLSM help required

  - by user68062

  I have confused myself following a VLSM tutorial and need to get my understanding confirmed, would this be the correct format, or am i away off again 172.31.0.0 VLSM this network address for as many subnetworks as possible, with no more than 14 hosts in each subnetwork. Show the subnet mask used. As the ip address is class b and contains 16 bits in the network portion, this means that we can have 2^16 = 65536 possible networks, to give each of these networks a maximum of 14 hosts we would use the subnet prefix \28 for each subnet. Is this correct? Thanks BB

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• pfSense routing between two routers with shared network

  - by JohnCC

  I have a network set-up using two pfSense routers arranged like this:- DMZ1 WAN1 WAN2 DMZ2 | | | | | | | | \___ PF1 PF2___/ | | | | \___TRUSTED___/ Each pfSense router has its own separate WAN connection, and a separate DMZ network attached to it. They share a common TRUSTED LAN between them. The machines on the trusted network have PF1 as their default gateway. PF1 has a static route defined to DMZ2 via PF2, and PF2 has a static route to DMZ1 via PF1. There is NAT to the WAN but internal networks (DMZ1/2 and TRUSTED) use different RFC1918 subnets. I inherited this arrangement, and all used to work fine. I made a config change to PF1 (relating to multicast), and machines on DMZ2 suddenly could not talk to TRUSTED. I rolled the change back, but the problem persisted. What I guess you'd hope would happen is that TCP packets would go DMZ2 - PF2 - TRUSTED and on return TRUSTED - PF1 - PF2 - DMZ2. That's the only way I can see it would have worked. However, PF1 drops the returning packets. I've verified this using tcpdump. I've worked around this by adding static routes to DMZ2 via PF2 to the servers on TRUSTED, but some devices on there do not support static routes so this is not ideal. Is there way to make this arrangement work decently, or is the design inherently flawed? Thanks!

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• Windows 7 with two network cards doesn't route traffic

  - by Tomek

  I have simple task to do: I have wni7 with two nics.I want to connect another comp(osx) to win7 through second nic to connect it to internet. I already changed the registry. Win7 interface with 192.168.2.1 has no gateway set (no point to do that) OSX interface with 192.168.2.2 has gateway set to 192.168.2.1 I do not add any routes on win7, every thing seems to be already there network on second nic is detected as "undefined network" (probably effect of no gateway) i can achieve any connectivity to internet from OSX only by enabling network connection sharing on nic with 192.168.2.1, but it enables NAT and I'm interested only in pure routing without nat(it's a setup for some research). firewall is off. It seems to me that win7 refuses to forward packets for some reason. Perhaps "undefined network" and NLA service is to blame, although i couldn't find any info about that. Below ascii schematics of my setup: internet<--router(192.168.1.1)<--(192.168.1.1) WIN7 (192.168.2.1)<--(192.168.2.2)OSX Thanks

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