I have moved to wordpress.com due to some changes in hosting provider.
Hopefully it will make me blog more !
I have moved to wordpress.com due to some changes in hosting provider.
Hopefully it will make me blog more !
Its been a long, long time since I blogged. Lots changed and lots to update on.
One major thing is I finally bit the bullet and dropped Windows Mobile 10. I was a long time user of W10M/8.1 Phone/8 Phone but I accepted fate and realised I am missing out on functionality, security, apps and tools. Whilst I still think Windows 10 is brilliant, I do use occasionally an Android tablet. The flexability and app store is very impressive, plus there s no way i’m ever going back to Apple.
So having done some research a while back and nearly going for a Samsung Galaxy 8 (v v expensive) then being curious by OnePlus, I preordered a OnePlus Five.
If you don’t know about them, check them out at https://oneplus.net/uk/5. Its bloody brilliant.
The OS is bang up to date, is fast and fluid. No crapware on there and the camera is great. Battery is brilliant, screen clear and nice and light. Well designed and I must say I’m seriously impressed. Ignore the crap about the ‘jelly effect’ as most of it comes from the fanboy sites and is hype over nothing.
More updates soon.
I use a HP Microserver N40 for use at our office. Its a great peice of kit that I have had for a number of years and is used for a variety of purposes such as NAS, Media Sharing, Print/File Server and Virtual Machine host…
I recently decided to upgrade from Windows Home Server 2011 to Windows Server Essentials 2012 R2, as well as some hardware upgrades.
Cisco have now released a BETA AnyConnect client for Windows Phone 8.1 availible here at the Windows Phone store
I havn’t tested the latest builds but the initial version had a few showstoppers that look like to have been fixed. Remember this uses SSL/TLS encryption only and your local security policy may mandate the use of IPsec, along with all its issues !
Also they dont appear to have fixed the session timeout bug so that may cause a few headaches with disconnects.
[There is next to no information availible on this around so this was borne out of experimentation and a lot of packet capture analytics]
Update: Since testing this I have since found that L2TP/IPsec does not work if the ASA is behind a NAT device. This is because the WP81 device explicitly will not connect to a NAT-T device. There is a registry key on Windows to enable this, however nothing on WP8.
Windows Phone 8.1 introduced a Native VPN client to the operating system. It allows L2TP/IPsec and IPSEC IKEv2 nativly, and various SSL VPN providers via plug ins downloaded from the Windows Store. At the moment Juniper, Checkpoint and F5 have all made clients. Sadly Cisco has not yet, although is due to release one by mid 2015.
This leaves organisations with a quandry not being able to support Windows Phone. This is a shame as the platform appears to try to support strong authentication and encryption schemes where possible.
You would like to think that Windows Phone supporting IKEv2 and Cisco AnyConnect 3.x/4.x’s IPSEC implmentation using only IKEv2 that it would interoperate.
Sadly it does not. The ASA – for some reason – always believes the Windows Phone to be a L2L (LAN to LAN/Site to Site) VPN. Repeated attempts could not get this to work.Since writing the above and reading the Cisco documentation more, you need ASA to be at 9.3(2) or above to support 3rd Party IPSec clients.
IKEv2 Proposals send from Windows Phone (just for information) are:
|3DES||SHA1||DH Gp 2|
|AES-CBC||128||SHA1||DH Gp 2|
|3DES||SHA256||DH Gp 2|
|AES-CBC||128||SHA256||DH Gp 2|
|AES-CBC||128||SHA384||DH Gp 2|
I’m still battling the ASA/WP81 connection using IKEv2 and certificates. The configuration appears to be a little problematic and current working solutions rely on the use of EAP for the client authentication. However, if you want to do plain, boring, RSA certificate authentication at both ends it does not work due to the ASA wanting to use RSA and the WP81 devices trying to ECDHA which the ASA dosent offer ….. [currently talking to TAC]
This only leaves L2TP/IPsec as an option, which the ASA does support. Effectivly this uses an IKEv1 IPSEC channel to tunnel L2TP over. L2TP is not a very secure protocol but is very good for tunneling, but over IPSEC it should be fine for most environments. As mentioned IKEv1 is used and the following modes are proposed from Windows Phone:
|AES-CBC||256||28800||seconds||SHA1||DH Gp 20|
|AES-CBC||128||28800||seconds||SHA1||DH Gp 19|
|AES-CBC||256||28800||seconds||SHA1||DH Gp 14|
|3DES||28800||seconds||SHA1||DH Gp 14|
|3DES||28800||seconds||SHA1||DH Gp 2|
Testing with ASA code 9.2-ish (seems ok on 8.6-ish too), only the last mode (3DES, SHA1, DH Gp2) appears to work. Not 100% sure of the reason, but I suspect Cisco only support DH Group 20, 19 and 14 when using IKEv2. Thus on ASA side you need to add:
crypto ikev1 policy 5 (or whatever you have free) authentication rsa-sig encryption 3des hash sha group 2 lifetime 28800
You then need to look at the IPSEC SA. The ‘best’ I found to work was using AES128 with SHA1 hash. The Windows client differs to a standard client in that it uses TRANSPORT mode, as apposed to TUNNEL mode. Windows also has some values for SA lifetimes that need to be used. Thus ASA config needs the following:
! Note: My ASA external interface is called 'outside', YMMV crypto dynamic-map outside_dyn_map 60000 set ikev1 transform-set ESP-AES-128-SHA-TRANS ESP-3DES-SHA-TRANS crypto dynamic-map outside_dyn_map 60000 set security-association lifeftime seconds 3600 crypto dynamic-map outside_dyn_map 60000 set security-association lifeftime kilobytes 250000 ! Note: No PFS is supported ! Note: NAT-T is enabled by default.
I could have ammended the standard dynamic crypto map to include these values but decides to keep it seperate.
Next challenge is authentication. The ASA supports Certificate based, but Windows Phone only supports Pre Shared Key along with username and password. This can be passed to whatever AAA solution you may have defined within the ASA (such as Active Directory/RADIUS/even SecurID) or could be a local username and password. Also the L2TP/IPsec profile does not support the concept of a ‘group’ (which can be used to map to an ASA connection profile) thus the DefaultRAGroup has to be used. Heres hoping haven’t used this group for any of your client access 🙂 If you have then you need to be very careful to break any existing access.
First you need to create a new group policy to attatch to the group
group-policy GP-WinPhone internal group-policy GP-WinPhone attributes wins-server none dns-server value 10.x.x.x 192.168.x.x vpn-tunnel-protocol l2tp-ipsec pfs enable default-domain value yourdomain.local
This sets the protocol, client domain servers and name. Next update the tunnel group
tunnel-group DefaultRAGroup general-attributes address-pool OneOfYourPools default-group-policy GP-WinPhone authentication-server-group LOCAL ! Set a different group here depending on local security policy tunnel-group DefaultRAGroup ipsec-attributes ikev1 pre-shared-key xxxxxxxxxx isakmp keepalive disable tunnel-group DefaultRAGroup ppp-attributes no authentication ppp no auuthentication ms-chap-v1 authentication ms-chap-v2
This should be enough apart from adding a new local user for authentication. In the above I used the local user database.
username myWinPhoUser password xxxxxxxxx nt-encrypted username myWinPhoUser attributes service-type remote-access
That should get you a working connection ASA side.
From the Windows Phone side configure from Settings > VPN > Add:
You can decide to set a Proxy as need be. As discussed before, there is no way to use L2TP/IPsec without a username and password being set. So you may as well use them either using a local user as additional Pre Shared Key or Active Directory Username and Password as additional authentication.
Good luck !
Finally had notification that I now am offically CISSP certified !
I’m not a certification chaser but decided late last year I wanted to do something different to pure technical qualifiactions. It was a very long (6 hour/250 questions – some interative) exam and certification process but now all done. Very happy.
Next is keeping up with various things to gain CPE’s
I think Certified Ethical Hacker (CEH) next……
Most people will be familiilar with the RFC 1918 standard for private network addressing.
Reading through a lot of the RFC’s, they have now been superceeded with later versions. The most current appears to be RFC6890 although badly formatted into tables. The prior version RFC5735 has a section 4 which is much more usable.
Address Block Present Use Reference ------------------------------------------------------------------ 0.0.0.0/8 "This" Network RFC 1122, Section 126.96.36.199 10.0.0.0/8 Private-Use Networks RFC 1918 127.0.0.0/8 Loopback RFC 1122, Section 188.8.131.52 169.254.0.0/16 Link Local RFC 3927 172.16.0.0/12 Private-Use Networks RFC 1918 192.0.0.0/24 IETF Protocol Assignments RFC 5736 192.0.2.0/24 TEST-NET-1 RFC 5737 184.108.40.206/24 6to4 Relay Anycast RFC 3068 192.168.0.0/16 Private-Use Networks RFC 1918 198.18.0.0/15 Network Interconnect Device Benchmark Testing RFC 2544 198.51.100.0/24 TEST-NET-2 RFC 5737 203.0.113.0/24 TEST-NET-3 RFC 5737 220.127.116.11/4 Multicast RFC 3171 240.0.0.0/4 Reserved for Future Use RFC 1112, Section 4 255.255.255.255/32 Limited Broadcast RFC 919, Section 7 RFC 922, Section 7
For DEV, LAB and TEST networks this shows two more segments that can be used (198.51.100.0/24 and 203.0.113.0/24) along with one I have used often 192.0.2.0/24.
Its amazing how ofter I have come accross organisations not taking these into account when planning schemes.
Despite what folks might think, if you have a ‘normal’ job and run your own blog its hard thing to reliably do.
I thought the challenge of blogging each day for a month would be easy. I thought prepare a few up front, write on some days, publish on others would work out but it didnt. I make eight days then failed. Real life got in the way and meant it got left.
Bit of a fail there for me…… however in the meantime I successfully passed my CISSP exam which is a big result for me. Perhaps ill have to blog about that ……. 🙂
I’ll try and post at least once a month from now on !
I have a fairly old car. Its a 2005 Land Rover Discovery 3 that I purchased back in 2009. Its a base model which meant it come without any of the frills and flash in car entertainment that the high spec HSE models come with.
It has its advantages. It means I can upgrade what I like without meaning causing issues with other features of the car.
In turn I have now replaced the head unit (for a Pioneer DAB, Bluetooth device) and then about three years ago fitted an in car PC. Ill detail this in another post but effectively its a ruggedised PC, with a 12v vehicle PSU (handles power cycle, starting cycle and power on/off) and allows attachments such as GPS, Bluetooth, Video Capture, Touch Screen, A/D Input/Output module etc and can be used for many things. Navigation, Media/Video, Camera recording and many other things. You can run Linux or Windows. I now have Windows 8.1 and run a custom front end called Centrafuse which controls everything and acts as the skin to control everything.
You have a number of nested folders and want to see a view in a tree style format. Try this alias (BASH only)
$ alias filetree="ls -R | grep ":$" | sed -e 's/:$//' -e 's/[^-][^/]*//--/g' -e 's/^/ /' -e 's/-/|/'" $ filetree
Hope it helps at least one of you !