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• Virutal Machine loses network connectivity on Hyper V

  - by Chris W

  We're running a number of VMs on a 6 node failover cluster of blades using Hyper V. We have an intermittent issue (every few days at different times - not a fixed frequency) of VMs losing network connectivity. Console access to the VM suggests all is fine and the underlying blade has normal connectivity. To resolve the problem we either have to re-start the VM or, more usually, we do a live migration to another blade which fires up connectivity and we then migrate it back to the original blade. I've had 3 instances of this happen with a specific VM running on a particular blade however it has happened once with a different VM running on a different blade. All VMs and blades have the same basic setup and are running Windows 2008 R2. Any ideas where I should be looking to diagnose the possible causes of this problem as the event logs provide no help?

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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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• Exposing the AnyConnect HTTPS service to outside network

  - by Maciej Swic

  We have a Cisco ASA 5505 with firmware ASA9.0(1) and ASDM 7.0(2). It is configured with a public ip address, and when trying to reach it from the outside by HTTPS for AnyConnect VPN, we get the following log output: 6 Nov 12 2012 07:01:40 <client-ip> 51000 <asa-ip> 443 Built inbound TCP connection 2889 for outside:<client-ip>/51000 (<client-ip>/51000) to identity:<asa-ip>/443 (<asa-ip>/443) 6 Nov 12 2012 07:01:40 <client-ip> 50999 <asa-ip> 443 Built inbound TCP connection 2890 for outside:<client-ip>/50999 (<client-ip>/50999) to identity:<asa-ip>/443 (<asa-ip>/443) 6 Nov 12 2012 07:01:40 <client-ip> 51000 <asa-ip> 443 Teardown TCP connection 2889 for outside:<client-ip>/51000 to identity:<asa-ip>/443 duration 0:00:00 bytes 0 No valid adjacency 6 Nov 12 2012 07:01:40 <client-ip> 50999 <asa-ip> 443 Teardown TCP connection 2890 for outside:<client-ip>/50999 to identity:<asa-ip>/443 duration 0:00:00 bytes 0 No valid adjacency We finished the startup wizard and the anyconnect vpn wizard and here is the resulting configuration: Cryptochecksum: 12262d68 23b0d136 bb55644a 9c08f86b : Saved : Written by enable_15 at 07:08:30.519 UTC Mon Nov 12 2012 ! ASA Version 9.0(1) ! hostname vpn domain-name office.<redacted>.com enable password <redacted> encrypted passwd <redacted> encrypted names ip local pool vpn-pool 192.168.67.2-192.168.67.253 mask 255.255.255.0 ! interface Ethernet0/0 switchport access vlan 2 ! interface Ethernet0/1 ! interface Ethernet0/2 ! interface Ethernet0/3 ! interface Ethernet0/4 ! interface Ethernet0/5 ! interface Ethernet0/6 ! interface Ethernet0/7 ! interface Vlan1 nameif inside security-level 100 ip address 192.168.68.250 255.255.255.0 ! interface Vlan2 nameif outside security-level 0 ip address <redacted> 255.255.255.248 ! ftp mode passive dns server-group DefaultDNS domain-name office.<redacted>.com object network obj_any subnet 0.0.0.0 0.0.0.0 pager lines 24 logging enable logging asdm informational mtu outside 1500 mtu inside 1500 icmp unreachable rate-limit 1 burst-size 1 no asdm history enable arp timeout 14400 no arp permit-nonconnected ! object network obj_any nat (inside,outside) dynamic interface timeout xlate 3:00:00 timeout pat-xlate 0:00:30 timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02 timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00 timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00 timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute timeout tcp-proxy-reassembly 0:01:00 timeout floating-conn 0:00:00 dynamic-access-policy-record DfltAccessPolicy user-identity default-domain LOCAL http server enable http 192.168.68.0 255.255.255.0 inside no snmp-server location no snmp-server contact snmp-server enable traps snmp authentication linkup linkdown coldstart warmstart crypto ipsec ikev2 ipsec-proposal DES protocol esp encryption des protocol esp integrity sha-1 md5 crypto ipsec ikev2 ipsec-proposal 3DES protocol esp encryption 3des protocol esp integrity sha-1 md5 crypto ipsec ikev2 ipsec-proposal AES protocol esp encryption aes protocol esp integrity sha-1 md5 crypto ipsec ikev2 ipsec-proposal AES192 protocol esp encryption aes-192 protocol esp integrity sha-1 md5 crypto ipsec ikev2 ipsec-proposal AES256 protocol esp encryption aes-256 protocol esp integrity sha-1 md5 crypto ipsec security-association pmtu-aging infinite crypto dynamic-map SYSTEM_DEFAULT_CRYPTO_MAP 65535 set ikev2 ipsec-proposal AES256 AES192 AES 3DES DES crypto map outside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP crypto map outside_map interface outside crypto map inside_map 65535 ipsec-isakmp dynamic SYSTEM_DEFAULT_CRYPTO_MAP crypto map inside_map interface inside crypto ca trustpoint _SmartCallHome_ServerCA crl configure crypto ca trustpoint ASDM_TrustPoint0 enrollment self subject-name CN=vpn proxy-ldc-issuer crl configure crypto ca trustpool policy crypto ca certificate chain _SmartCallHome_ServerCA certificate ca 6ecc7aa5a7032009b8cebcf4e952d491 <redacted> quit crypto ca certificate chain ASDM_TrustPoint0 certificate f678a050 <redacted> quit crypto ikev2 policy 1 encryption aes-256 integrity sha group 5 2 prf sha lifetime seconds 86400 crypto ikev2 policy 10 encryption aes-192 integrity sha group 5 2 prf sha lifetime seconds 86400 crypto ikev2 policy 20 encryption aes integrity sha group 5 2 prf sha lifetime seconds 86400 crypto ikev2 policy 30 encryption 3des integrity sha group 5 2 prf sha lifetime seconds 86400 crypto ikev2 policy 40 encryption des integrity sha group 5 2 prf sha lifetime seconds 86400 crypto ikev2 enable outside client-services port 443 crypto ikev2 remote-access trustpoint ASDM_TrustPoint0 telnet timeout 5 ssh 192.168.68.0 255.255.255.0 inside ssh timeout 5 console timeout 0 vpn-addr-assign local reuse-delay 60 dhcpd auto_config outside ! dhcpd address 192.168.68.254-192.168.68.254 inside ! threat-detection basic-threat threat-detection statistics access-list no threat-detection statistics tcp-intercept ssl trust-point ASDM_TrustPoint0 inside ssl trust-point ASDM_TrustPoint0 outside webvpn enable outside enable inside anyconnect image disk0:/anyconnect-win-3.1.01065-k9.pkg 1 anyconnect image disk0:/anyconnect-linux-3.1.01065-k9.pkg 2 anyconnect image disk0:/anyconnect-macosx-i386-3.1.01065-k9.pkg 3 anyconnect profiles GM-AnyConnect_client_profile disk0:/GM-AnyConnect_client_profile.xml anyconnect enable tunnel-group-list enable group-policy GroupPolicy_GM-AnyConnect internal group-policy GroupPolicy_GM-AnyConnect attributes wins-server none dns-server value 192.168.68.254 vpn-tunnel-protocol ikev2 ssl-client default-domain value office.<redacted>.com webvpn anyconnect profiles value GM-AnyConnect_client_profile type user username <redacted> password <redacted> encrypted tunnel-group GM-AnyConnect type remote-access tunnel-group GM-AnyConnect general-attributes address-pool vpn-pool default-group-policy GroupPolicy_GM-AnyConnect tunnel-group GM-AnyConnect webvpn-attributes group-alias GM-AnyConnect enable ! class-map inspection_default match default-inspection-traffic ! ! policy-map type inspect dns preset_dns_map parameters message-length maximum client auto message-length maximum 512 policy-map global_policy class inspection_default inspect dns preset_dns_map inspect ftp inspect h323 h225 inspect h323 ras inspect rsh inspect rtsp inspect esmtp inspect sqlnet inspect skinny inspect sunrpc inspect xdmcp inspect sip inspect netbios inspect tftp inspect ip-options ! service-policy global_policy global prompt hostname context call-home reporting anonymous Cryptochecksum:12262d6823b0d136bb55644a9c08f86b : end Clearly we are missing something, but the question is, what?

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• Upgrading my home network to Gigabit Ethernet and Wireless-N turns out slower than before

  - by Raheel Khan

  My home network has three desktops, three laptops and some NAS drives. All desktops and NAS drives support Gigabit LAN and all laptops support Wireless-N. I was running a 100 BaseT switch though. I recently purchased a Gigabit Ethernet Switch and an Wireless-N ADSL Modem-Router. After upgrading, I noticed that the wireless file transfer speeds from laptop-to-NAS and vice versa became terribly slow. Possibly even slower than before the upgrade. The transfer speeds from desktop-to-NAS (wired) have improved though. As an example, copying a 50GB file from laptop-to-NAS was estimated at 15 hours! Is there something I can do to improve this? Also, should I consider buying a dedicated wireless access point for speed rather than using the Wireless modem-router?

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• Connecting Small business network to Azure Site to Site VPN

  - by MarkKGreenway

  Would like to have connectivity between azure virtual machines and on LAN users. My current network has a Cisco ISA550 connected to the WAN (one Ethernet cable into the office the fiber transceiver is on a different floor)and any public servers can be one-to one NAT-ed to have a public and private IP. What is the best way to get a reliable connection. Between end users and the cloud? I want to know the preferred on site endpoint. Do the azure vm's have to have a local ip in the LAN subnet? (Right now 10.10.0.0/20 or 255.255.240.0 to give room if this is the case). If in purchased an asa550 would I put it behind or in front of the isa550. Would it be ahead or peer with the users switches? What is the best way to get a reliable connection. Between end users and the cloud servers?

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• Utility to unmap a network drive when the screen saver starts

  - by JimR

  I'm looking for a way to unmap network drives when the screen saver turns on. I have a few users that share an external, encrypted drive (Samba share, not windows) and they have a requirement to disconnect the drive mapping when the local machine is idle. I'd also like it to warn them if there are open files on the mapped drive, if possible. There is also a requirement to force the password to be reentered before mapping when the machine comes back from idle. Is there a Windows setting or utility out there in the wild that meets these requirements?

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• Network - Routers conflicting in my subnet

  - by Richard

  I have a router whose IP is 192.168.1.1 and I be experiencing conflict with another router on my subnet (which probably has 192.168.1.1 as IP too). I think when it tries to connect to the network, eventually taking the place of my router because when I try to access the config page of my router, which appears to me is a config page from another router that is not mine. Do you have any solution except to change the IP of my router to an IP not common? As I have set up the exclusivity that only my IP router? I work with dynamic IPs (wireless networking) and static (for wired). How do I? I just wanna to do some setting in my router that affects all other, so that doesn't conflicts anymore.

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• Reset Network Load Balancer Connection Pool

  - by bill_the_loser

  I am currently working on load testing a web application on a virtual machine cluster. I am looking for a way to flush the connection pool / NLB cache so that it is like each machine connecting to the NLB is connecting for the first time and doesn't get directed back to the node that it was on last time. This a Windows 2003 Server cluster, behind a Microsoft software based Network Load Balancer. Additional Information: To do the load testing I'm using virtual machines, one for each node on the cluster. Somehow I got two virtual machines connecting to the same node and I'm looking for an easier way to reset those connections without going in to the NLB Manager and stopping and starting each node on the NLB. Update: We went ahead and changed the affinity on all of the nodes of the cluster to none. Now it's a non-issue.

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• How can I scan documents from a Lexmark x543n over the network on OS X 10.6

  - by Thomas Lötzer

  Hi, I just got a Lexmark x543dn and have some trouble getting my computer to recognize it as a scanner. The printer is working fine from my OS X 10.6 machine, setup was as easy as it gets. I just connected it to my network, gave it a name and added it under that name as a networked printer in OS X. According to the Apple support website, the driver in OS X (I upgraded to the newest drivers already) should also provide scanning capabilities. However when I run the image capture app included in OS X it tells me that there are no scanners available. Can anybody tell me what I have to do to get OS X to recognize the scanner? Thanks, Thomas

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• windows firewall and network location switch after establishing a vpn connection

  - by Konrads

  Hello, I am looking for a reasonable solution for network location switching after VPN connection is established for Windows 7. The scenario is as follows: For location public (employee plugging in his laptop in hotel, public wi-fi,etc) all inbound connections are restricted, only outbound VPN + www is enabled. Employee then initiates a VPN connection, VPN pushes routes to 10.0.0.0/8 subnet Now I would like to have lax security rules for traffic from/to 10.0.0.0/8 that comes through the VPN interface, while still protecting the laptop from traffic that comes via uplink interface as if it was private. How to achieve this switching and duality? One option I see is switching to IPSec...

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• Cannot see http (apache) server outside home network

  - by user165155

  Ive been racking my brain with this all evening. Power went out with a tstorm today, started back up my server... running apache and a team speak server on it. TS is great, cant see my web page outside my network! Firewall is disabled on the pc running it (centos btw), apache is running and working. correct ports are forwarded on my router (my isp blocks port 80). Ive tried changing ports, pretty much everything i can think of. httpd.conf is pointing to the correct addy and port, and my domain is pointing to the correct external ip. Im at a loss, any ideas out there?

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• Accessing localhost on IIS7 from another computer on the network

  - by Adam

  I recently upgraded computers to Windows 7 Professional and am running IIS7. When I'm on my computer I can easily access localhost through my web browser but when I try from another computer on my network (replacing localhost with my computer name) it doesn't work. I also tried using "computername.domain.com" and still no luck. I can access other computers running Windows XP and IIS 5 but I'm having no luck accessing my own from another computer. I checked and my IIS7 has anonymous users enabled. Am I missing any other setting? Is this an IIS7 thing or am I missing a setting? Thanks in advance!

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• How can I configure a Linksys EA4500 + usb printer for network printing (without connect cloud)

  - by Larry Kyrala

  The documentation and classic firmware (2.0.37) for Cisco's Linksys EA4500 is a bit sparse on setup details. It says I can connect a USB-printer, but then goes on to try to sell "Connect Cloud" remote management software. I don't want that. I just want to know how to set this up with the existing advanced firmware. Is it possible? AFAIK, to setup a IPP or LDP printer, there is usually some kind of queue configuration on the server (i.e. the ea4500 in this case), but I can't find it in the firmware. I also have been unable to find any existing protocols from win7 or mac osx. (windows network share, IPP/LDP etc.) I'm curious if I need to have the "Storage" accounts active and connect to my router either via the local IP or router name. There's a lot of unknowns here; it would help to know how this particular router actually works.

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• VoIP - need setup ip network with our SIP operator

  - by evgeniy.labusnkiy

  Need to make next one: for ex i'm now in UAE, but i need to make a call to my girlfriend who is in Ukraine. I need to find the way how can i make the connection to my home router and make the call from VoIP gateway using my standard phone network in Ukraine. I have some imagination about this, to do like this: Connect to router or VoIP gateway (how? soft?) using inet - Gateway make a call using standard phone line in my country. Any ideas? Best practice? What devices i need to make this? Pay attention that i don't want to use any SIP providers. Thats a lot!

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• Wamp server that works over a network

  - by user28233

  I have 2 computers. Both with w7 as os. I have installed wampserver on one of them. I have mysql database on wampserver. Then I have made a vb.net program to connect to mysql database. I have put the program on both computers. What I want to do is for those two programs to see the same database that is on one computer. For them to be able to add, delete, update that 1 database. How do I do that? How do I network the mysql database? Do I also have to install wampserver on the other computer? What do I do? Please enlighten me.

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• network configuration busted good

  - by jldupont

  On my Linux Ubuntu Karmic machine, when I try to net conf list I get: [2010/03/14 21:25:18, 0] registry/reg_init_basic.c:32(registry_init_common) Failed to initialize the registry: WERR_ACCESS_DENIED I think I may have busted my networking configuration good this time... I can't get Nautilus "networking" functions to work i.e. the "Places - Network" won't show my Windows workgroup anymore... Please help! note1: I have verified my SAMBA configuration and it isn't the problem. note2: I have uninstalled Winbind, Dnsmasq and Squid to get my configuration as simple as possible to debug.

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• Error installing Network driver

  - by Simon Carpentier

  I'm tring to install NetLimiter 3 (3.0.0.10, x64) on my Windows 7 x64 machine. At the driver installation step, I'm getting an error: Error 0x8004a029: Couldn't install the network component. (InstallNdisIMDriver) UPDATE 2010-09-20: I received a response to my support request: Hi Simon, It seems that problem is rather on your system than in NL3. Too many networking applications (VPN, Virtual computers) are installed on your machine and they are preventing NL3 from proper installation. In order to install NetLimiter 3, try to disable/temporarily remove these apps. Several users had the same problem and shuffling with adapter and networking software helped them. Please, let us know which action helps you (if any). Sincerely, Jan Bilek Any thoughts on this?

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• Instant messanger capable of offline messaging & tolerant of network interruptions

  - by Terry

  I am looking for an instant messaging solution to facilitate communications between recovery vehicles in remote rural areas. All the vehicles have internet connections, but they are intermittent depending on location. Ideally we'd like something that has the following features: Offline messaging: messages sent to clients who are offline will be delivered when they next come online, regardless of whether the sender is still online or not. Lightweight: CPU cycles are limited on the machines in these vehicles. A bloated solution will be an issue. Client platform is primarily win32, but support for osx/linux/mobile devices would be a bonus. Non-chatty: Bandwidth is a precious commodity for us, so services which use a minimal amount are ideal. Fault tolerant: We see plenty of packetloss and high latency, so whatever we use needs to be able to function in trying network conditions. I'm not fussed if we use a hosted platform like gtalk/skype/msn/icq/whatever, and likewise I can run a server if need be. Suggestions would be appreciated!

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• How should I isolate computers with different roles on a network

  - by fishhead

  I work in an industrial plant and we have one network(physical wire) that us used for both office usage and for process systems. The office computers are only used for typical office needs but occasionally do connect to the process computers to obtain information from a sql server or for some other purpose. A new initiative is in the works and is rolling down hill from corporate and that is to standardize how the the computers are used at work and they would be severely locked down and only a standard set of applications will be allowed to execute. one of the requirements is to also have non office computers isolated from the company domain. our non-office computers are a mix of Man-Machine interfaces and sql-servers all running software that non standard. My question is, how can we divorce the control systems computers from the company domain but still have access to the servers from the company domain. thanks

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• How should I isolate computers with different roles on a network

  - by fishhead

  I work in an industrial plant and we have one network(physical wire) that us used for both office usage and for process systems. The office computers are only used for typical office needs but occasionally do connect to the process computers to obtain information from a sql server or for some other purpose. A new initiative is in the works and is rolling down hill from corporate and that is to standardize how the the computers are used at work and they would be severely locked down and only a standard set of applications will be allowed to execute. one of the requirements is to also have non office computers isolated from the company domain. our non-office computers are a mix of Man-Machine interfaces and sql-servers all running software that non standard. My question is, how can we divorce the control systems computers from the company domain but still have access to the servers from the company domain. thanks

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• wireless network with cable modem and access point

  - by hayri

  I have a Scientific Atlanta EPC2203 cable modem and a TP-Link TL-WA500G access point. When I connect my computer directly to modem with a CAT5e cable I have internet connection on my laptop (when i type ipconfig i see my external ip there, provided by isp). So I decided to have wireless network in the flat, allowing other devices to connect as well. I bought this wireless ap (TL-WA500G) configured Wireless security stuff, and connected it to my modem. With that configuration (by default AP has static ip of 192.168.1.254) only my computer can connect to internet over wifi, but not any other device. When I set the IP of AP to Dynamic IP (DHCP) it is the same. How should I change my configuration to enable all wifi devices to connect to internet?

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• Internet connection slower than network connection speed

  - by Mike Pateras

  I've got a computer connected to a wireless router on a different floor. When I look at the network connection, I'm told the signal strength is low, and that I've got a connection of about 26mbps (often higher). However, my internet connection on that machine is very slow. Speedtests show it at about 1-2mbps, and it really shows when loading pages and video. I have fiber optic internet access, and the machine that's connected to the router/modem via cable gets the 20mbps on speed tests, and is extremely fast in every day use. My question is, is the advertised 26mbps+ connection speed perhaps inaccurate, and that my wireless bandwidth is the likely bottleneck here? Or is the signal strength what's key here? And what might I do about this? Power cycling the router helped a bit, a speed test went as high as 6mbps after doing that.

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• Unable to access internal network through PfSense WAN port

  - by Sean

  Our branch office is unable to connect to our internal network for some reason. However we can connect to the branch office domain controller from behind PfSense. The following is our setup: |Branch DC - 192.168.0.101 | |Branch Firewall - 192.168.0.2 | |(Internet) | |Local Firewall - 192.168.3.1 | |PFSense WAN port - 192.168.3.100 |PFSense LAN port - 192.168.1.1 | | DC1 - 192.168.1.2|DC2 - 192.168.1.4 Branch DC can ping and connect to PFSense WebGUI on the WAN port successfully (we set this up using the PfSense documentation). DC1 and DC2 can connect outbound to the Branch DC. There seems to be a rule that prevents internal access on the WAN port. However our rules are set to allow all traffic on the LAN and WAN ports. It would be ideal to just disable the firewall altogether since we already have a firewall but when we do this, PfSense doesn't allow any internal traffic at all. I look forward to any assistance and thank you ahead of time.

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• Why not all users can log in to a network computer by using <network computer name>/<user name> form

  - by Haris

  There is a file server in my office that is not connected to my office LAN. In this server there are folders that are shared. This server is connected to a switch and a wireless router. Everyone who wants to access this server uses wireless network connection. They log in to this server by providing user name and password registered to the server. Some people can log in to my office file server by providing user name in (the server name)/(user name) format, while other must use (the server IP address)/(user name) format. Why is it like this? I need everyone can access the file server by providing user name in (the server name)/(user name) format. I have tried to change the %SystemRoot%\system32\drivers\etc\hosts file, as some suggested, but it won't work. Any other suggestion?

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• Using ADSL Modem/WiFi Router to share existing network wirelessly

  - by joshhunt

  At my uni we have a wired Ethernet connection in our dorms. However, I want to share this connection with my macbook using wifi (so I don't have to be constantly tethered). I am looking at using my DSL G064T ADSL modem/WiFi router as a wifi repeater for the uni network. Is this possible? How would I go about doing this? I understand that it would be possible using a normal Wifi router (seeing as it has an ethernet 'in' port where it would get the external connection from.), so is it just not possible using the router I have? If i need to buy another one, which one would you recommend?

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