Error – The Computer You Are Signing Into Is Protected By An Authentication Firewall
KB ID 0001241 Problem I put a ‘net use’ command in a logon script for a client today, and the drive refused to appear. So I executed the offending line and saw the following error; System error 1935 has occurred The computer you are signing into is protected by an authentication firewall. The specified account is not allowed to authenticate the computer. Solution This error is seen because the user, (or group the user is a...
Cisco ASA – Adding New Networks to Existing VPNs
KB ID 0001240 Problem Note: To add new subnets to an AnyConnect Remote Access VPN, see the following article instead; Cisco ASA – Adding New Networks to AnyConnect VPNs I see this get asked in forums A LOT, so I though I’d get around to getting it written up. If you have an existing VPN to a remote site and then need to add another network how do you do it? Well that depends on where the new network is, and how it’s...
Cisco VPN – Split Tunnel Not Working?
KB ID 0001239 Problem Here I’m dealing with AnyConnect VPNs, but the principles are exactly the same for both remote IPSEC and L2TP VPNs. You connect to your VPN and can no longer browse the internet from your remote location. You can confirm that split-tunnelling is working or not by connecting with your VPN client and looking at the routing information. Solution Before proceeding are you sure Split-Tunnelling has ever been...
Changing Domain Users’ ‘User Logon Names’ and UPN’s
KB ID 0001238 Problem Changing a users UPN suffix is easy (as long as it’s been added – see below). There is some confusion about the User Login Name though. A few weeks ago I had a client that needed this done, (for an office 365 migration). But they had the added problem that some of their User Logon Names had spaces in them, they were in first-name{space}last-name format. What would happen if I changed their user...
Cisco ASA – Allowing Microsoft Activation
KB ID 0001237 Problem Activation occurs over TCP 80 and 443, so usually this will not trip you up. However if you are on a site with a very restrictive firewall config, then you might want to add the following. Solution I’ll break with the norm, and just post the config in its entirety, (just remove the comments in red.) !The Firewall needs a domain name of its own. ! domain-name petenetlive.com ! !Setup DNS Lookups so the...
AnyConnect – The VPN Connection Failed (Domain Name Resolution)
KB ID 0001236 Problem This is a pretty generic error to be honest. AnyConnect Secure Mobility Client VPN The VPN connection failed due to unsuccessful domain name resolution. Solution Firstly, (and obviously) the name you are typing in the AnyConnect window can be resolved can’t it? If not then you might want to consider some employment that does not involve computers. Secondly (this is what usually trips me up) did you copy...
Migrating Local Profiles to Domain Profiles
KB ID 0001235 Problem Moving a machine onto a Windows domain, is a simple task, I’ve done this for a lot of clients. The main complaint (post migration,) is that something is missing. This is because your-account-name on your PC or laptop, and your-account-name in the domain are TWO DIFFERENT ACCOUNTS, (even if they have the same name). Microsoft have produced some tools help you, but I challenge you to start reading the USMT...
Cisco – Dissolve / Break ASA Failover Firewall Configuration
KB ID 0001234 Problem I’ve written at length about setting up failover firewall configurations. But what if you already have a working pair, and you need to remove one? There’s plenty of reasons to do this, i.e. another site needs a firewall in a hurry, you’re replacing failover firewalls with a single firewall, or you just need to do sone testing and don’t have a spare. Solution It goes without saying, before...
Cisco VPN Client Connects but no traffic will Pass
Note: May also be asked as, Client VPN connects but cannot ping anything behind the Firewall. KB ID 0000199 Problem If I had a pound for every time I’ve seen this either in the wild, or asked in a forum, I would be minted! In nearly every case the problem is NAT related. In most cases, If the person launching the VPN client is behind a device that is performing NAT, (Home Router, Access Point, Firewall, etc) then the device will...
Robocopy – File Server Migration
KB ID 0001233 Problem I’ve done a lot of migrations, and moving a client’s files and shared data, usually makes them cringe. I’ve lost count of the amount of times I’ve heard ‘We can’t have any downtime’, which is fine, until you tell them how much its going to cost to do this on a Saturday! As I posted recently, Microsoft have made this a lot easier with the file serve migration tools,...