Sole's Blog

Posts Tagged ‘ntlm’

All PPTP VPN interfaces in ISA 2006 (sp1) disappeared from the Routing and Remote Access Service console, this problem was a cool problem both because it was challenging but also due to the unexpected results and solutions we found.

The first google attempt at finding a solution told us to try the following workaround – Not recommended!

• Run the following command: C:\> netsh int ip reset c:\resetlog.txt

Well this solution might fix the problem here and now, but you might as well turn to the good old solution of restarting your server every time it fails, because this solution will do the following.

• Enable DHCP and remove all IP configuration of all interfaces.
  Not the smartest move on a server, and you are stuck with having to retype all your settings again.
• Most likely the problem will reappear again, since it does not fix the problem.

Now looking deeper into the error, we started looking at event logs – nothing here to help us (let us know if you had any usefull info here for this error). Then we tried various other things, including looking at a snapshot of the memory usage (you can just open taskmgr.exe) and found something surprising. Wspsrv.exe was using more memory handles than all other processes combined on the machine. A memory leak! It has been several years since I ran into a memory leak, it used to be the most common problem for programmers to avoid, but I rarely see them any more. Read the rest of this entry »

The easiest way (I love easy!) to order and install an SSL certificate on Exchange 2007, is to order a SAN (Subject Alternative Name) certificate with AutoCSR meaning you dont have to create a CSR but instead get a certificate backup file. You also save time with the SAN because you only use one certificate for all services and can move services from one domain to another in the certificate with no problems.

Make sure you get a SAN certificate including the full domain name(s) you use to access Outlook Web Access, Outlook Anywhere, Autodiscover and any internal servernames using the certificate (usually free).

The Certificate you order should contain something like this:

• mail.sole.dk and/or owa.sole.dk – for Outlook Web Access
• autodiscover.sole.dk and any other e-mail domain you use with Autodiscover/OA.
• MYSERVER01 – and any other server that will be using the certificate

Personally I setup servers to respond only to OWA on the mail./owa. domain, and use all other services like Outlook Anywhere, ActiveSync, etc. on the autodiscover. address, this way I can use Forms Based Authentication with my OWA website, and NTLM with my other services. Some people argue for and against having internal server names in the certificate, but I figure if they are free anyways, and might help why not add them – and if security is so much an issue that internal server names must not be revealed, you have other much bigger problems anyway.

Now some simple commands to manipulate Exchange 2007 SSL certificates. (Stolen from the danish Exchange 2007 guide on FairSSL a danish SSL certificate reseller – thanks!) Read the rest of this entry »