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• Netgear Wireless-n 150 wrn1000v2

  - by Jordan

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

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• Event ID 8021 The browser was unable to retrieve a list of servers from the browser master

  - by Ash

  We have a LAN where workstations are randomly losing network connectivity for brief moments of time. The workstations can also take a long time to login to the domain. During our troubleshooting we have found an error log on a few Windows 7 workstations: Warning BROWSER 8021 The browser was unable to retrieve a list of servers from the browser master \\random-pc on the network \Device\NetBT_Tcpip_{BBABCDE9-D8A0-4399-93F2-492FE0848B12}. The data is the error code. What do these errors mean? What computers should have the Computer Browser service enabled, workstations and/or servers? The environment is a mix of Windows 7 & Windows XP workstations on a Windows Server SBS 2011 SP1 domain.

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• Strongswan and OpenVPN together

  - by cmorgia

  I have an host in Amazon EC2 which is configured with an OpenVPN Access Server. The only client to this server is acting as a gateway from a private network. I installed StrongSWAN 5 on the same host to allow windows 7 and iOS clients to connect using IPSEC. Both services works but what I cannot figure out is how to configure StrongSWAN to consider the OpenVPN tunnel endpoint as the only gateway available to clients. Basically I want all the traffic that comes from IPSEC clients to be entirely forwarded to the OpenVPN tunnel. The remote OpenVPN client that is exposing the private network has forwarding enabled and appropriate masquerading configured. The only missing point is to have the OpenVPN tunnel as the gateway for IPsEC clients

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• Can't connect to Windows Server 2008 shared folders via VPN connection

  - by Pearl

  I set up an VPN connection on my 2008 server using RRAS. The VPN seems to work fine. I can connect from outside the network. I am also able to establish a remote access connection via the VPN-IP. However, I can't access my shared folders. After connecting to the VPN I can ping the server, but it is not shown in my networks. using \ip or \server-name doesn't work either, cannot be found. I checked ipconfig and this is what I found regarding the VPN: DNS-Suffix: Description: test Physical Adress: DHCP activated: No Auto-Config: Yes IPv4-Adress: 192.168.2.114 Sub: 255.255.255.255 Standard-gateway: DNS-Server: 192.168.0.1 NetBIOS: activated To clarify my IP-situation: server is connected to router with 192.168.0.x, the test-client is in an external network connected to a router with 192.168.1.x, server-client connection is using static ips with 192.168.2.x Can anyone help me with this one? The VPN should be ok since I am able to establish remote access.

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• DNS servers via RA in IPv6

  - by glglgl

  Some time ago, RFC 6106 was created, which states how a router tells the clients about the DNS server to be used. It is a new standard, it has to be implemented, which needs time etc. I'm courious about the need for it: wouldn't have it been better to define a "globally valid" anycast address for DNS? Queries would be sent to this address and would be promoted along the default route until there is a host which claims to be responsible for it. In an enterprise network, that would be a central DNS server (or even more, on really big companies); in a SOHO network, it would either be the router or the DNS server of the ISP, in a root server hosting data center, it would be the DNS of the hoster, etc. What do I see wrong here? Do I have a wrong view of the anycast concept?

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• VirtualBox networking problem, host XP, guest Debian

  - by Silma

  Hi, I'm trying to set up a development environment in a virtual machine on my laptop, with debian os. I have both lan and wlan available on the host machine, yet I can't connect to the internet using either. As I said the host OS is windows XP and the guest OS will be the latest Debian, we downloaded the business card net install so we need internet access from the beginning, besides we need the virtual machine to be visible on the local network (for my fellow developers). We tried host-only networking, NAT, bridging, with proxy (the local network uses a proxy to connect to the internet) and without proxy, nothing seems to work. What else can we do? Thanks a lot.

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• How to start a task before networking?

  - by user1252434

  I've written an upstart task that modifies /etc/network/interfaces. (Actually a file sourced into it.) Which start on condition do I need to declare to let my task run before any networking jobs? I've tried start on starting networking, but that's apparently too late. When I log in after booting I can see that the changes were written, but obviously they are not used: the new config states a static IP, but the boot process waits for a non-existing DHCP server (old config) to time out. I've also tried start on starting network-interface INTERFACE=eth0, which didn't work either. IIRC there was an error in the log that the change couldn't be written. Background: I need a VM template that can be cloned and the clones configured through a script. Among other settings, I need to give them a static IP address to access them from the host. I use guestfish to write a config file to one of the virtual disks and let a script apply these settings to the system. I don't want that disk to contain an actual system settings file. I can't modify /etc directly, because that disk is shared (copy-on-write/diff) among the clones and guestfish apparently doesn't support that type of image. I could also let them use DHCP and setup a server that assigns IP by MAC, but I'm afraid of the complexity. I could also add just another virtual disk for configuration files, but if possible I'd prefer to store settings directly on the system disk image. Used software: Ubuntu Server 12.04, VirtualBox. The configuration modifier is a self written ruby script.

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• DNS updating issue

  - by Will

  Hey guys, I'm new to serverfault so please excuse me if I sound a tad nub. I work in an environment that is kinda peace mealed together, and I honestly don't know how it works. I'm new to the IT field and am still in school. When I replace a PC I rename the old one to mo-o-pcname and give the new one the proper name of mo-pcname (mo is a location thing we use so it really doesn't apply to the problem.) The new PC will function on the network; it will have the ability to access network resources (printers, file shares, etc) and it will have the ability to get out to the internet. However I can no longer ping the machine. It would appear as if the DNS (A) record is not getting updated or something. Like I said I'm kinda new to the field and just trying to work through this problem. Thanks for your help.

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• Remote Access Problems with DRAC 5 on Dell PowerEdge 1950

  - by Darin Peterson

  Today I received my first Dell PowerEdge 1950 server with a DRAC 5 card. On my local network I have static configurations on my Linux systems using this for instance: iface eth0 inet static address 192.168.1.210 netmask 255.255.255.0 network 192.168.1.0 broadcast 192.168.1.255 gateway 192.168.1.1 dns-nameservers 8.8.8.8 8.8.4.4 For the DRAC card, I configured the LAN like this: address 192.168.1.215 netmask 255.255.255.0 gateway 192.168.1.1 For the advanced LAN settings I used dns-nameservers 8.8.8.8 8.8.4.4 I've tried many different IP addresses, but cannot communicate with the card. Is there anyone who might know if I have configuration issues, or maybe if the card might be bad?

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• Internet connection sharing: Ubuntu 9.10 Server on Windows 7 and VMWare

  - by avesse

  I'm trying to get Internet Connection Sharing (ICS) working between my Windows 7 RTM host and a Ubuntu 9.10 Server running on VMWare Workstation 6.5, but I have not been able to get it right. Here's what I have done: Configured VMWare to use Host Only networking (I tried NAT as well). Enabled ICS on my host's network connection, allowing VMnet1. After enabling it, Windows informed me that its VMnet1 IP has changed to 192.168.137.1. So in VMWare's Virtual Network Editor I configured VMnet1: Subnet 192.168.137.0 Mask 255.255.255.0 I did the same for DHCP. For NAT i set 192.168.137.1 as Gateway. I cannot ping any sites or get access through apt-get/aptitude install/update, although domains do get resolved to IPs. I have also tried using a static IP in Ubuntu. I don't know if it makes a difference, but my external IP is locked to my host's MAC address.

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• ASA 5510 Need to filter traffic log events to my iPhone

  - by drpcken

  For some reason I cannot update apps or download apps to any ios devices on my network (tried both iphone and ipads). When I'm at home on my own network everything works fine. This started about a week ago. I've configured my iphone with a static IP address and even used 4.2.2.2 as my dns to rule out that the issue is with my DNS Server. I'm looking at the SYSLOG in ASDM (Cisco ASA 5510) but Im not sure it is providing me enough info. It seems to be showing ACL blocks on my public ip address, but not individual client IP's, so I can't see whats going on. How can I setup a way to filter any incoming/outgoing traffic to my iPhone's static IP and try and troubleshoot this?

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• On setting up Apache and IIS to share the same IP

  - by miCRoSCoPiCeaRthLinG

  Hello, There are two different web-apps running on two (physically) different servers on our network... one of IIS and another one on Apache - both on port 80 since two machines are accessible by different IPs on our internal network. Now I want to expose both these services to the world. My idea is to somehow make the incoming connection redirect to the appropriate server based on user's choice of subdomain. Example xxx.domain.com maps to the IIS (Internal IP: 1.2.3.4) yyy.domain.com maps to Apache (Internal IP: 5.6.7.8) To the world, both these servers will share the same public IP. What kind of a configuration am I looking at and how do I go about trapping the subdomain requests and redirecting to the appropriate server? Thanks, m^e

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• How to route HyperV VMs traffic through host VPN

  - by Random

  I'm using Windows 8.1 Pro with HyperV. I have several VMs for development, all of them connected with host via Internal adapter using network addresses: 192.168.10.0/24 Where: 192.168.10.1 is my host's Hyper-V internal NIC address. When I'm not in my office I use 3G usb dongle an dialup VPN connection. I would like to route traffic from all existing and future VMs through the VPN. In best scenario traffic would be routed only partially to the local company network addresses 10.1.1.0/24 I don't want to use sharing because I'm switching between WiFi, USB 3G dongle and VPN. Moving to other virtualization is also not an option for me.

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• How do you add a certificate for WLAN in Linux, at the command-line?

  - by Neil

  I'm using Maemo on a Nokia n810 Internet tablet, and when given a list of installed certificates to choose from when connecting to a PEAP wireless network, it's always blank. I've already installed a couple of certificates through the gui on the device, and only the certificate authorities show up. I've confirmed that Maemo's connection software that handles certificates is buggy, in such a way that certificates are never added, or properly added certificates cannot be found. Is there a way to add WLAN certificates at the command-line, and connect to a wireless network at the command-line as well? I used to use iwconfig to connect, but I never used it with PEAP. Note: I have nothing in /etc/ssl/certs

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• How should one manager external and internal DNS servers at the same time?

  - by erotsppa

  We run a mac network here in the office. We have an internal DNS server to manage the network. Everything is resolved to a local ip (for mail.mydomain.com etc). However, we also have an external DNS server for when our users are not in the office. However, isn't it a pain to have to manage two lists? Whenever you change something you have to change another? And you can't have one be a slave of another because the ip are sometimes different (for example mail.mydomain.com would point to a local ip in local dns server but an external ip in the external dns server). Any tricks?

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• What is Causing this IIS 7 Web Service Sporadic Connectivity Error?

  - by dpalau

  On sporadic occasions we receive the following error when attempting to call an .asmx web service from a .Net client application: "The underlying connection was closed: A connection that was expected to be kept alive was closed by the server. Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host." By sporadic I mean that it might occur zero, once every few days, or a half-dozen times a day for some users. It will never occur for the first web service call of a user. And the subsequent (usually the same) call will always work immediately after the failure. The failures happen across a variety of methods in the service and usually happens between 15-20 seconds (according to the log) from the time of the request. Looking in the IIS site log for the particular call will show one or the other of the following windows error codes: 121: The semaphore timeout period has elapsed. 1236: The network connection was aborted by the local system. Some additional environment details: Running on internal network web farm consisting of two servers running IIS7 on Windows Server 2008 OS. These problems did not occur when running in an older IIS6 web farm of three servers running on Windows Server 2003 (and we use a single IIS6/2003 instance for our development and staging environments with no issues). EDIT: Also, all of these server instances are VMWare virtual machines, not sure if that is a surprise anymore or not. The web service is a .Net 2.0/3.5 compiled .asmx web service that has its own application pool (.Net 2.0, integrated pipeline). Only has Windows Authentication enabled. We have another web service on the farm that uses the same physical path as the primary service, the only difference being that Basic Authentication is enabled. This is used for a portion of our ERP system. Have tried using the same and different application pool - no effect on the error. This site isn't hit as often as the primary site and has never had an error. As mentioned, the error will only happen when called from the .Net client - not from other applications. The client application is always creating a new web service object for each request and setting the service credentials to System.Net.CredentialCache.DefaultCredentials. The application is either deployed locally to a client or run in a Citrix server session. Those users running in Citrix doesn't seem to experience the issue, only locally deployed clients. The Citrix servers and the web farm are located in the same physical location and are located in the same IP range (10.67.xx.xx). Locally deployed clients experiencing the error are located elsewhere (10.105.xx.xx, 10.31.xx.xx). I've checked the OS logs to see if I can see any problems but nothing really sticks out. EDIT: Actually, I myself just ran into the error a little bit ago. I decided to check out the logs again and saw that there was a Security log entry of "Audit Failure" at the 'same' time (IIS log entry at 1:39:59, event log entry at 1:39:50). Not sure if this is a coincidence or not, I'll have to check out the logs of previous errors. I'm probably grasping for straws but the details: Log Name: Security Source: Microsoft-Windows-Security-Auditing Date: 7/8/2009 1:39:50 PM Event ID: 5159 Task Category: Filtering Platform Connection Level: Information Keywords: Audit Failure User: N/A Computer: is071019.<**.net Description: The Windows Filtering Platform has blocked a bind to a local port. Application Information: Process ID: 1260 Application Name: \device\harddiskvolume1\windows\system32\svchost.exe Network Information: Source Address: 0.0.0.0 Source Port: 54802 Protocol: 17 Filter Information: Filter Run-Time ID: 0 Layer Name: Resource Assignment Layer Run-Time ID: 36 I've also tried to use Failed Request Tracing in IIS7 but the service call never actually gets to where FRT can capture it (even though the failure is logged in the web service log). The network infrastructure group said they checked out the DNS and any NIC settings are correct so there is no 'flapping'. Everything pans out. I'm not sure that they checked out any domain controller servers though to see if that could be an issue. Any ideas? Or any other debugging strategies to get to the bottom of this? I'm just the developer in charge of the software and don't really have the knowledge on what to investigate from the networking side of things - although it does sound like a networking issue to me based on what is happening. Thanks in advance for any help.

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• Podcast Show Notes: Red Room Interview &ndash; Part 3: Ninja BPM

  - by Bob Rhubart

  The third and final segment of my conversation with Red Room bloggers Sean Boiling, Richard Ward, and Mervin Chaing is now available. Listen to Part 1 Listen to Part 2 Listen to Part 3 As you’ll hear, this segment gets its title from another example of Mervin’s tactic for tweaking terminology to make it easier to sell stakeholders on certain SOA concepts. These are some very bright, very knowledgeable guys, so I encourage you to connect with them via the links below to pick their brains on any SOA or related issues that might have you reaching for the aspirin bottle. Sean Boiling - Sales Consulting Manager for Oracle Fusion Middleware LinkedIn | Twitter | Blog Richard Ward - SOA Channel Development Manager at Oracle LinkedIn | Blog Mervin Chiang - Consulting Principal at Leonardo Consulting LinkedIn | Twitter | Blog Once again, you’ll find the complete list of Red Room SOA Best Practice Posts in here. Up Next Next week’s program features another panel discussion recorded during a virtual min meet-up. The panel includes Oracle ACE Directors Mike van Alst (IT-Eye) and Jordan Braunstein (TUSC) along with The Definitive Guide to SOA: Oracle Service Bus author Jeff Davies. Stay tuned: RSS   Technorati Tags: oracle technology network,oracle,archbeat,podcast. arch2arch,soa,bpm del.icio.us Tags: oracle technology network,oracle,archbeat,podcast. arch2arch,soa,bpm

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• Adding a Microsoft Exchange 2010 account to my Windows Phone 7.5 mobile (Nokia Lumia 800) without trusted certificate

  - by MAXE

  I have problems in creating an account on my Nokia Lumia 800 (OS version: 7.10.8773.98, of course with Windows Phone 7.1 mounted with all updates) to one of my company's Microsoft Exchange 2010 server, because it cannot provide a trusted certificate...but only when contacting it from outside my network (like https ://mail.(CompanyName).com). Accessing the server from inside my network (pointing directly to the machine name or internal IP address: https ://(MachineName) or https ://10.0.1.200) gives me NO PROBLEM AT ALL! Setting correctly (I guess) all the parameters for the account (accessing from outside my network), the connection (after correctly set my credentials as asked) will not be established. It gives the next error (translated from my language manually): Error of <CompanyName> There is a problem with the certificate of (Server Address). Please contact support or the provider. Last try: X minutes ago Error code: 80072F06 I've tried all possible configurations and parameters (including the check The server requires an encrypted (SSL) connection, of course), but no way. EDITED: As suggested by Oliver Salzburg, I also tried this way without any results. I tried so: I went to my OWA (Outlook Web Access) that gives me the same problem (problems the certificate, it's not trusted) After accepting to continue, I clicked on the Error in Certificate button of the Internet Explorer 9 address bar - Show Certificates - page Details, show: - Copy to file... button - in the exporting wizard: Next - Binary encoding DER X.509 (.cer) (but there was also Base binary 64 X.509 (.cer), no way) - Next - saved to a new file From my Google Mail Account, I sent a mail to myself the certificate as attachment I read the mail from my WP7 phone, saved the attachment and then ran it: answering Yes to Do you wany to install the certificate? of course... Closed any active program and rebooted the phone Re-tried in synchronizing my account....:(...SAME PROBLEM! EDITED 2: Thanks again to Oliver Salzburg, I tried the next solution: I went to the site https://www.testexchangeconnectivity.com/ I selected Exchange ActiveSync option, as suggested I setted all my parameters, as I made for my phone I also setted the option Ignore SSL attendibility (and in another test I didn't) I performed my test This is the complete log (I removed my parameters): Seems the same problem (machine name in the certificate is different from the external Exchange website domain name?)! It is possible to get rid of this annoying (I know by myself who is this server!) problem? Thank you very much.

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• How to connect my Android to my Laptop wirelessly , to stream data between the two?

  - by Deepun

  I want to stream data from my Laptop PC to my Android phone using TCP or UDP by creating sockets in both the phone and the laptop, but it has to be done wirelessly. How do I connect them to stream the data ? I thought creating an ad-hoc wireless network from my laptop and connecting to it using my Android would work. But my Android is not detecting the ad-hoc network. Is there any other way how I can connect the two ? I downloaded this software called 'connectify' and created a wifi hotspot on my laptop, and successfully connected the two. But will I be able to stream data to my device using this connection ? Can simple direct Bluetooth connection help me in creating sockets in both phone and laptop and stream the data ?

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• Proper use of disk to disk to tape backup using de-duplication and LTO5

  - by Michael

  I currently have ~12TB of data for a full disk to tape (LTO3) backup. Needless to say, it's now requiring over 16 tapes so I'm looking at other solutions. Here is what I've come up with. I'd like to hear the community's thoughts. Server for Disk-to-Disk BackupExec 2010 Using De-duplication Technology 20+TB worth of SATA drives LTO5 robotic library connected via SAS 1Gbps NIC connected to network What I envision is doing a full backup of my entire network which will initially take a long time over the 1Gbps NIC but once the de-duplication kicks in backups should be quick. I will then use the LTO5 to make disk to tape backups and archive those accordingly. What does everyone think? Any faster way of doing the initial full backup over the 1Gbps NIC? What will be my pain points? Is there a better way of doing what I'm trying to achieve?

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• Computer disappeared from Workgroup

  - by Moayad Mardini

  I've a LAN that has 8 computers running Windows XP and only one (Computer A) running Windows Server 2003. When computer A boots, it shows up in all computers' Workgroups, but after 15-30 minutes, it disappears from the Workgroup in all computers, including itself. However, files can still be transferred from and to A via full path shortcuts and network drive maps still work. I don't know if this has anything to do with the problem or not, but if that particular computer is turned on while the LAN cable is plugged in, it doesn't connect to the network, but it connects if the cable is plugged in after the computer is run. Any tips why this is happening? Thanks.

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• Cannot connect Ubunto to Windows pc either direction

  - by Frank A

  New to ubuntu and really struggling with this. I want to connect to my old windows XP Pc on our home network. Searching for solutions gets complicated as at one level you are told use Connect to Server. I set to Windows Share, type in server IP address.. ... I get "Failed to retrieve share list from server" Demo on Youtube worked with no problem. Other advice in ask ubuntu is you need to install samba. Did that but nothing seems to happen when I try and run it other than it asking for admin password. (How do you tell what is running on Ubuntu?) So I try the other direction Windows XP to Ubuntu. I made the ubuntu directory within home frank shared and tried various combination such as \ipaddress\home\frank but just "The folder you entered does not appear to be valid. Please choose another." My entire data only drive is shared in Windows and no problems accessing that from other Win XP boxes on our network There are no alerts in Windows firewall, Ubuntu Firestarter did block but changed that to allowed... or so I thought. In firestarter I had set up Inbound traffic policy 192.168.1.1/24. And since then it has added the ip address of the win pc twice. So, I am in a state of confusion not knowing whedre to turn next so thought Ask Ubuntu :)

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• Centos and dell PowerEdge Rxxx Series.

  - by OrenM

  hi we lately purchase few dell servers all of them from Rxxx series couple of R410 and R710 the OS we used on those servers is: CentOS 5.4 we're getting very weird error messages and we lost network connectivity couple of times (restarting the network interface was needed to fix it) the messages we're getting are: Message from syslogd@ at Wed Nov 18 12:07:08 2009 ... servername kernel: Uhhuh. NMI received for unknown reason 20. Message from syslogd@ at Wed Nov 18 12:07:08 2009 ... servername kernel: Do you have a strange power saving mode enabled? Message from syslogd@ at Wed Nov 18 12:07:08 2009 ... servername kernel: Dazed and confused, but trying to continue we have never seen those messages in the previous series of dell poweredge servers do someone here using centOS 5.4 on Rxxx series? did it happen to him too? maybe you have a suggestion about how to prevent it from happening

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• Linked Tables not working With Access Database

  - by Kronass

  Hi, I have an Access database in a computer and I want to access it from other computer in the network. so I made mapped drive and created Linked Tables, then Imported all the objects (forms, queries, reports). when I open access database in the second computer and make any changes in using the forms non of the changes are affected in the main computer (supposedly server) and vise-versa. what am I missing? if this way will not work how can I access the Access database from other computer in the network and be able to use all the objects and make changes in it? hint: Access Version at main computer is 2003 and client pc 2007, will it effect?

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• ISA Server Route Add Question

  - by Kip

  Hi All, I have a situation where I have and ISA 2006 server (on Win2k3) that has an internal and an externaly facing NIC's. All works fine but I need to add a couple of routes for the following reason: Our monitoring software is on a different network. Our Terminal server is on a different network. Currently, access to the internet, through this proxy server, from the terminal server fails. Also, monitoring of the ISA server via a remote monitor or the installed agent talking to the remote monitor (BMC) also fails. The default enterprise rule on ISA blocks the traffic as I beleive it doesn't trust / know about those networks. Here is my routing table: I need to add a couple of address, but this one being the main one: 192.168.245.137 / mask 255.255.255.192 / gateway 192.168.245.129 But I can't get it to work. Routing is not my strong point but at the moment have no one else available to help. Can you offer any assistance? Please ask if you need more info

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