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• Samba as a PDC and offline authentication

  - by Aimé Barteaux

  Say I have a Windows laptop which has been connected to a domain. The domain has a Samba server as a PDC. Now say that I move the laptop outside of the network (the network is completely inaccessible). Will I be able to logon into accounts I have accessed before on the laptop (through GINA)? Update: Looking at the smb.comf documentation I noticed the setting winbind offline logon: This parameter is designed to control whether Winbind should allow to login with the pam_winbind module using Cached Credentials. If enabled, winbindd will store user credentials from successful logins encrypted in a local cache.. To me it looks like this solves the issue but can anyone else confirm it and/or point out if any additional values need to be set?

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• IPv6 connections routed to IPv4 device

  - by Yvan JANSSENS

  I have an IBM 9406-250 with V5R1 and IPv4 only connectivity, and want it to be reachable over IPv6. I cannnot install an IPv6 stack on it, but I want it to be accessible by IPv6 so I can drop the requirement to VPN to my home network. I have an OpenWRT device running, which takes care of the IPv6 routing on my network and the tunnel to SIXXS, and I was wondering if it is possible to assign another IPv6 address to that device, and route it to the IPv4 IBM computer. Which software do I need for this, and how is this technique called?

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• How to create persistent static route on Mac OS X 10.6?

  - by kopobamypa

  I need to add static route on Mac OS. I found good description here Permanent Static Route Mac OS X 10.4.0 and followed the Roark Holz's (roarkh) solution. Now my problem: sometimes this solution works, sometimes does not. When it doesn't work I see these messages after boot in the Console Messages log: 06.05.10 9:34:13 com.apple.launchd[1] *** launchd[1] has started up. *** 06.05.10 9:34:46 com.apple.SystemStarter[30] Adding Static Route to 10.152 06.05.10 9:34:46 com.apple.SystemStarter[30] route: writing to routing socket: Network is unreachable 06.05.10 9:34:46 com.apple.SystemStarter[30] add net 10.152.0.0: gateway 192.168.1.234: Network is unreachable I want to know what is going on. How this kind of problem can be troubleshooted?

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• How to connect MTS MBlaze on ubuntu 11.04

  - by murali_ma

  i have installed ubuntu 11.04 inside the windows xp. i have MTS Mblaze USB Modem. (my service provider is MTS MBlaze,india) i want to use Mblaze into ubuntu so that i did the following steps for make connecting the device. from the task bar->edit connections->mobile broadband->choose country->mts mblaze and ok i give username and password ([email protected] and password MTS. ok now i enable mobile broadband , MTS MBlaze connection1(connection name) from task bar. steps followed from "http://randomshandom.wordpress.com/2010/12/20/how-to-connect-mts-mblaze-device-in-ubuntu-10-10-11-04/#more-3" for the first time it successfully connected and browse the internet. after i restart the system i connect it. it does not connected. it shows Modem network disconnected. i accessed many times and delete the connection and recreated but i does not help me. if i try to connect device i think it the search the network, i saw the wave signal. img Image for showing problem:

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• Trouble opening my router to my web server

  - by Justin Heather Barrios

  Here's the story. I have a webs server created and connected to my router. The website works great when I'm connected to the router, but when I'm off the network I can't access the website. I got the IP for my router by googling "what is my ip." I have opened ports 80 to 10080 to link to the server in the router. One odd thing that I don't understand. When I am in network if I access XXX.XXX.XX.XX:80 I can access the web page no problem. If I access XXX.XXX.XX.XX:81 (or any other port) I get the error "Cannot access server." Any idea what the problem could be? Could it be my ISP?

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• Remote Access Without Explicit Permission: Convenience or Liability?

  - by routeNpingme

  For outsourced professional IT remote support, one habit most new technicians get into is the "instead of getting the user to start up remote support each time, I'll go ahead and install LogMeIn / GoToMyPC / Remote Desktop / whatever so that if they call again, I can just jump on and help them". This of course opens up a potential liability because a client PC on a network that we don't own is being accessed without a user explicitly providing permission by clicking a "Yes, allow technician to control my PC" option. I realize the rules totally change when you're an IT admin over a network that you "own", but this is outsourced IT support. Just curious what others' policies are. Is this an acceptable practice for convenience and I'm turning into one of those "security is more important than anything" people, or is this really a liability?

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• How to troubleshoot problems sharing internet connection via WiFi on Mac OS X

  - by sprugman

  I'm at a hotel, plugged into their network via ethernet on my MacBook. I want to share the connection via wifi to two other computers. I went to Prefs Sharing and set up internet sharing. I know it's working because my friend with a Mac access the net fine. My friend with the PC can see the network, but can't connect to it. In the sharing prefs, airport options, I chose these options: Channel: Automatic Enable encryption: yes WEP Key length 40-bit password length: 5 chars (as specified in the instructional text) Update: I tried it with encryption turned off, and it works. Of course, I'd rather not do that... Any ideas?

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• How to route packets from Wi-Fi to Ethernet on OSX?

  - by Alexander Artemenko

  I have a trouble, configuring a home network. Here is how my devices are connected together: Internet     ? Wi-Fi Router ? MacBook     ? iMac ?ethernet cable? Synology NAS I have no ability to plugin NAS right into the Wi-Fi router. The problem is that MacBook does not see NAS, because they are in different networks — I configured Wi-Fi Router to serve 192.168.10.0/24 addresses, and configured iMac's ethernet connection to use 192.168.20/24 network. Is there a way to setup route from MacBook to the NAS?

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• Routers with USB plug to connect external storage

  - by sixtyfootersdude

  I am just about to buy a new wireless router. I want to be able to hook up a harddrive to it and let the harddrive serve the entire network. I will mostly be storing media and some backups on the drive. I know I could get some kind of NAS but I would prefer to just hook up one of my many unused hard drives directly to my router. It looks like d-link has several products that do this using shareport. If you were wanting to have network storage how would you do it? With a NAS? Using a router with a USB port. Are these systems robust? What router would you buy?

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• Netgear VPN can't access specific server

  - by Critologist

  I have a Netgear FVS318N configured with a VPN. I'm trying to access my call recorder with the provided software from another office. I've already setup the VPN connection, and it works. I can connect and ping the remote router and a few other things on the network. However, I can't ping or connect to my call recorder. If I move outside of the office network (i.e. connect directly to the cable modem or via a mobile hotspot), I can connect and ping the call recorder just fine. The office has a simple Linksys WRT54G router and is using AT&T Uverse. The remote location is using Charter Cable with a Netgear FVS318N. Has anyone ever encountered anything like this before? I've setup an identical VPN previously for a different client using similar hardware and never encountered this. Thanks in advance!

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• Load Testing Linux Virtual Server

  - by Anubhav Agarwal

  I have configured a Linux virtual network with following configuration 172.17.6.112- VIP 172.17.6.111- Linux Director | |----------172.17.6.113 --- Real Server 1 |----------172.17.6.114 --- Real Server 2 I am using direct routing technique. I am unable to test my LVS network. Are there some good scripts/softwares available for load testing. I am running apache2.0 service on them. I came across with testlvs on the internet but am unable to understand its documentation. Are there more simpler ones I want to test the response time of server using various scheduling algorithms .

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• Aventail VPN connection doesn't work

  - by Warlax

  I installed the Aventail VPN client on both the Mac and a Windows 7 machine, both on my home network. When I try to connect one or the other (I make sure one is disconnected before connecting through the other machine), I get a connection and view the correct certificate - accept it and Aventail tells me that I am connected. However, accessing any page inside my company's network is only possible on Windows. On the Mac I get this page: It looks like my ISP doesn't know how to redirect me? Maybe something about my DNS being set incorrectly on the Mac? Our helpdesk has been completely useless.

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• Can't find a wireless access point's IP address after changing router IP/LAN settings

  - by flagg19

  I have a modem/router, Netgear DG834, and a wireless access point (AP), Netgear WG602. The AP is directly connected to the router. My old working configuration was: Router IP address : 192.168.0.1 Access point IP address: 192.168.0.10 My new configuration is: Router IP address : 192.168.1.1 Access point IP address: ???.???.???.??? I changed my router's IP address/LAN settings to set up a VPN with another Netgear router that had the same LAN configuration. The wireless network is still up and perfectly working, but I can't find the AP's IP address. I've tried broadcast ping but the AP won't respond. I looked at the router "attached devices", but it's not there. I've played around with Nmap and arp request but the AP is totally invisible. I can fix it by resetting it to factory settings, but I'm very interested in learning more about this problem. I'm also interested in network security and this fact of having an invisible AP well, it's something I'd like to understand.

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• How can I use my laptop's monitor as my PC's ONLY monitor? (please vote to reopen) [closed]

  - by Randell

  Please vote to reopen. This is different from Can I use my laptop as a second monitor for my desk computer?, because that question is asking how to use the laptop screen as the secondary display, not as the only display. My PC's monitor just died and I'm not looking at buying a new monitor anytime soon. So I'm thinking of using my laptop's monitor for it. Both machines are running on Fedora linux. Edit: Both machines are connected to the same wireless network. PC needs to log in before it can connect to the network if I'm not mistaken.

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• Windows 7 - Home Drive Map Fails

  - by Ed Fries

  Server 2003 SP2 (not R2) with 2 new Win 7 Pro workstations. Home Drive is set in AD (not GP) to map to \\server\users\username. Home Drive map fails, other network drives map correctly. No error logged on server or PC, Win 7 shows "Could not reconnect all network drives." There is no Y: (Home Drive) listed, either in the GUI or via Net Use. Manual map via batch file in startup group with the same path works correctly? Home Drive map works correctly on XP workstations.

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• Own hosting, own domain on Virtualbox Ubuntu server - dynamic IP

  - by Pawel

  Hi, I have bought my TLD domain, say domain.com. What I'd like to do is to host the website available under this address on my own computer. I'm assigned a dynamic IP, and I'm also behind a router in my local network. I'd run sites on my ubuntu server on a virtualbox machine which is available in my local network. Preferably, I'd like to have my own domain on some server, with which I could experiment as much as I need (so it's only for educational purposes), but I can't afford to buy such a service. Is it feasible? Can you provide steps I'd need to take to configure it (could be just general explanation). I'd need some guidance, please.

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• WiFi slow sometimes, reboot helps, how do I debug it?

  - by January

  Ubuntu 12.04.1 with all updates installed. Laptop Lenovo Thinkpad X230 with Intel Corporation Centrino Advanced-N 6205. WiFi sometimes becomes extremely slow. Often this occurs when I wake the system from suspend and connect to a different network. I find no obvious clues in system logs. /etc/init.d/network-manager restart doesn't help, but a reboot does. How can I go on with debugging this issue? In specific, which parts of the system should I try to restart (without a complete reboot)? I know of problems with Intel WiFi (see for example this question and the instructions here), but if that was the problem, I would expect the WiFi to be slow at all times, and not just sometimes. Also, I have a gut feeling that it might be a DNS issue (for example, getting a page from a known server is faster than accessing a new server), but I don't know how to tackle it. Update: despite numerous updates in the meanwhile, I still observe this behavior. It happens always when I access my WiFi router at home after returning from work; when I reboot my laptop, the connection speed is good again.

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• How to synchronize users, passwords, hosts, etc without NIS

  - by joshxdr

  I am administering a very small solaris 2.6 network with 4 boxes total. Is it possible to use scp or similar to replace NIS for synchronizing users, groups, hosts, etc? This network is only a small part of my job and I don't want to spend too much time on it, and I am worried the setup and maintenence of NIS will not pay off. I need it to behave like a proper multi-user system, when a user logs into any machine, the users, passwords, hosts, etc. are always the same. Is there an easy way to do this with scp? Right now I copy /etc/passwd from one box to another with scp, but sometimes I make mistakes or forget a step, and scp inside of shell scripts don't seem to works so well since they require password authentication. Any recommendations would be welcome.

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• Linksys Wireless-N ADSL2 WAG160N losing connection

  - by Sam1973

  It seems that recently I have to turn off and then turn on my router every time I want to connect my laptop(s) to the internet. This is what's happens: When I want to connect to the internet on my laptop, the network icon in the system tray states that I am connected to the wireless network but there's no "internet connectivity" I turn off the router and turn it back on and then I can connect to the internet. I am sure there is something that needs to be done. Can you guys point me to the right direction?

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• Bridging two connections in windows 7

  - by Serban Razvan

  I have recently bought an Samsung UE32ES5500 and I want to connect it to the internet. Not wanting to buy an expensive Samsung wireless adapter for the TV, I've decided to use an ethernet cable. Because the Internet cable passes through underground to the bedroom and the TV is located in the living room, i decided to put a router in the bedroom, and receive it's signal in the living room using a windows 7 laptop. Afterwards I connected the laptop to the TV through an ethernet cable, and bridged the two connections in Network Connections in Control Panel on the laptop. The TV successfully finds the laptop (and the router I think) but still cannot connect to the internet. Does anyone knows a solution to this problem? (the connections must be bridged because I want to have only one network in the house)

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• unreachable subnet in one direction

  - by Carl Michaud

  I'm unable to route traffic to a subnet in my home. Here's my topology: INET <- Router A <- Router B <- WIFI AP where: Router A - ARRIS TG862G/CT (from comcast) - WAN DHCP, LAN 10.0.0.99 Router B - Linksys WRT400N with DD-WRT - WAN 10.0.0.12 , LAN 10.0.1.1 I was able to use DD-WRT to configure a static route for the 10.0.1.x network back to the 10.0.0.x network. But I'm not sure if i can do the reverse on the ARRIS router and was looking for suggestions on how to fix that. I've set things up this wasy because I am using OpenDNS to mange internet content for my kids and of course I wasn't able to configure DNS to my liking on Router A either. So at present I'm using Router A on 10.0.0.x to provide a private unfiltered WIFI AP (no ssid broadcast) that I use for netflix only and then I use router B to provide a filtered WIFI AP for the rest of my WIFI devices on 10.0.1.x. However I would like to be able to connect to my 10.0.1.x devices from the internet via dynamic dns; but I can't see anything behind router B this way. Thoughts?

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• servers connected to a poweredge 6248 receive traffic for their 'neighbours'

  - by Hannes

  In the network we have a few vlans but at the moment I was investigating vlan2 which carries the most traffic. When tcpdumping on the eth0.2 interface, I see a lot of packets arriving which are not addressed to, nor coming from the server. I checked this on several servers in the network and they all have the same issues. In short, our switches don't switch the traffic but threat it like they are a hub. Can you tell me what settings on the dell poweredge 6248 should prevent this behaviour?

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• Why my webservice not live on internet? [closed]

  - by blankon91

  I've windows server that goes live on internet, (e.g. www.mysite.com). Then I want to create another site with different port (e.g. www.mysite.com:502). I've create that and it works when I access it on local network, but when I access it from outside of local network (internet) the www.mysite.com:502 can't accessed but the www.mysite.com can accessed. what should I do to make www.mysite.com:502 goes online? I use windows server 2008 standard

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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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• Domain users sometimes cannot access our NAS

  - by Natalie

  I'm using a QNAP TS-410 Turbo NAS and I've got domain users connecting to it frequently everyday. However, there are times when their connection to the NAS will seem to just drop and, suddenly, they cannot access their network drives (which I had set up our Domain Controller to automatically map to folders on the NAS). Could you please tell me what may cause this? I don't think it is a network issue as everything else seems to work just fine. (If more details are needed, please let me know so I can update this question.)

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