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Archive for the ‘PPTP’ Category

Reminder to self: when your PPTP server is behind a NAT, forward both GRE protocol and TCP port 1723

Posted by jpluimers on 2017/06/06

The WAN sides of my Mikrotik CCR1009 are partly behind Fritz!Box routers that do NAT and contain a truckload of port-forwards.

A while ago, I wanted the CCR1009 to do PPTP as Fritz!Box 7360 and 7490: static routes over VPN don’t work (so I could only VPN to the WAN side of the CCR1009). However, it would not pass through the Fritz!Box from the outside.

It appears you need to forward both:

TCP Port 1723 for the authentication/control part of the connection
GRE protocol to encapsulate the actual tunnel

Maybe one day I will ditch the Fritz!Box 7490 and directly hookup the Mikrotik to the NTU: xs4all ftth en Mikrotik router – Google Groups.

But preferably I should follow Don’t use PPTP, and don’t use IPSEC-PSK either (via: CloudCracker blog)

–jeroen

via: VPNs einrichten mit PPTP – administrator.de: Achtung mit PPTP VPN Servern hinter NAT Firewalls !

Forward both PPTP TCP port 1723 and the GRE protocol

Posted in Fritz!, Fritz!Box, Fritz!WLAN, Internet, IPSec, MikroTik, Network-and-equipment, Power User, PPTP, Routers, VPN | Leave a Comment »

Some links for MikroTik tips and scripts

Posted by jpluimers on 2017/04/25

MikroTik has great hardware, but getting things to work can be a bit ehm intimidating.

So here are some links that were useful getting my CCR1009 and CRS226 configurations to do what I wanted.

Saving your configuration (two possibilities: binary backup file which only works on the same physical model device, or text based configuration export script that you can import back to any model).
- When you import a configuration, those settings are added to your current configuration.
- If your configuration gets more complex, it pays to split the textual exports into logical blocks so you can import each of them individually.
- You can even put the downloaded exports into a version control system like Git or SVN.
- The exported configurations are stored in the file system. You cannot manually rename these files, but there is a scripting trick to perform the rename.
- You can download the exported configurations from the UIs in webfig, winbox or through sftp after configuring certificate logon.
Choosing ports for WAN and LAN
- On the CCR1009, the first 4 ports can be used for switching (see also other ref), so it makes sense using those for LAN and others for WAN as it can increase speed: CCR 1009 switch chip menu – MikroTik RouterOS
  - Just look at the block diagrams of the various CCR1009-8G-1S models (currently CCR1009-8G-1S-PC, CCR1009-8G-1S-1S+, CCR1009-8G-1S-1S+PC) as they all have the first four ports connected to an Atheros 8327 Gigabit Switch chip.
  - All ports of the CRS226 models (CRS226-24G-2S+RM and CRS226-24G-2S+IN) are connected through the combined QCA8519-AC2C switching and CPU chip).
  - Note that the switching chips won’t allow for Torch. But you can find the MAC addresses per physical switch ports in the unicast FDBs: Switch -> Unicast FDB shows you every mac and the physical port it is connected to.
Never ever use the domain named .local for your local domain if you have Apple devices in your network:
- .local is a reserved dns domain by the apple os and should not be used if you expect apple devices to work as expected.
Many people like Winbox because they prefer visual configuration. Others like the web or terminal interface better (the terminal is especially useful for scripts)
- Windows Winbox: MikroTik Routers and Wireless: Downloads
- Mac OS X Winbox: “Winbox” by MikroTik with Wine in order to make it usable on Mac – Joshaven.com
Manual:First time startup – MikroTik Wiki (default password for admin is empty; WinBox and web-interface are available on WAN *and* LAN interfaces!)
- Mikrotik Howto block Winbox Discovery + Limit Winbox Access | Syed Jahanzaib Personal Blog to Share Knowledge !
One of the first things I did was binding some ports to use LAN and others to use WAN. The LAN ports are in a bridge: Configure one port for WAN and others for LAN – MikroTik RouterOS
Manual:IP/DHCP Server – MikroTik Wiki and Manual:IP/Pools – MikroTik Wiki
- I had a lot of DHCP entries on my LAN before switching to the MikroTik for which some I wanted to add statically. Couldn’t find out how to do that in the IP pool, but it appeared there is a different way to do it:
  - Assign fixed / static IP address via Mikrotik DHCP server
  - Notes:
    1. the MAC address cab be either (:) separated or minus (-) separated. And yes: there is a RegEx for that.
    2. usually you don’t pass the client-id (it’s here just as an example that you could use it, but most DHCP clients do NOT use a client-ID, as they only use the MAC address)
  - /ip dhcp-server lease add address=192.168.100.10 mac-address=70:F1:A1:D1:49:49 client-id="client10"
Manual:IP/DNS – MikroTik Wiki
- If you use the MikroTik as a caching DNS server, then you need to enable “/ip dns set allow-remote-requests=yes”, but also immediately disable DNS TCP and UDP on all your WAN ports. See:
  - Client DNS issue (reddit)
  - Firewall filter rules for DNS – MikroTik RouterOS
  - /ip firewall filter add chain=input protocol=tcp dst-port=53 action=drop in-interface=!bridge_lan add chain=input protocol=udp dst-port=53 action=drop in-interface=!bridge_lan
  - If you run your internal DNS servers for the outside world, modify the rules to forward non non-LAN ports; see https://www.youtube.com/watch?v=X-wkLYKYaj8: How to redirect DNS to own DNS server using mikrotik routerboard
  - You can add statis DNS entries to your caching server; see https://www.youtube.com/watch?v=zDEx7TxCm1s: Mikrotik Training- Static DNS Entries (With Closed Captioning)
nslookup on the Mikrotik itself is called put[: resolv ...] syntax: nslookup on Mikrotik – MikroTik RouterOS
- Examples (first uses the internal DNS, second one one of the Google DNS servers):
  - put [:resolve shell.xs4all.nl]
  - put [:resolve shell.xs4all.nl 8.8.8.8]
  - put [:resolve 194.109.21.9]
tolaris.com · Synchronising DHCP and DNS on Mikrotik routers (script available on Github: Tolaris/mikrotik-dns-dhcp).
- via MikroTik – Automatically creating DNS record for each DHCP lease/client – GeekTank
- alternatives:
  - Mikrotik DHCP to DNS hostnames | BLOG.MESOUUG.COM
  - Setting static DNS record for each DHCP lease – MikroTik Wiki
Hardening (since my Guest WiFi is outside of the Mikrotik LAN and WAN realm, I’ve left some things open, for instance MAC service is available, but on a limit set of interfaces):
- Router Hardening — Manito Networks
- Not sure if disabling Neighbour discovery is a good thing, as it will disable this from the console as well
  /ip neighbor print;
  - Mikrotik Howto block Winbox Discovery + Limit Winbox Access | Syed Jahanzaib Personal Blog to Share Knowledge !
- Blacklist Filter update script – MikroTik RouterOS
  - As the above is much better maintained it is preferred over Spamhaus + Dshield Malicious Ip Blacklist For RouterOS Now Availalable GRATIS! – MikroTik RouterOS
Manual:Upgrading RouterOS – MikroTik Wiki
- http://web.archive.org/web/*/http://www.mikrotik.com/download/CHANGELOG_6
Manual:IP/Route – MikroTik Wiki (if you think routing is a massive topic, read about firewall rules).
Not sure this is a good idea, but you can get a DDNS address in the sn.mynetname.net domain and VPN to it (for instance using PPTP): Quick Set Home AP — How to use vpn provided? – MikroTik RouterOS
You need to setup both the clock (date/time) and SNTP in one step:
- Setup SNTP (Winbox) aka NTP (shell): /system ntp client set enabled=yes server-dns-names=0.pool.ntp.org,1.pool.ntp.org,2.pool.ntp.org,3.pool.ntp.org
  After a few seconds the Winbox will update the SNTP Client dialog and a few seconds later, the Clock dialog will also update itself.
Manual:IP/Firewall/NAT – MikroTik Wiki
- dstnat: Forwarding a port to an internal IP – MikroTik Wiki and https://www.youtube.com/watch?v=8sGL58AhQCQ:
  Mikrotik Training- Port Forwarding (With Closed Captioning)
- srcnat: getting NAT to work
- Hairpin NAT – MikroTik Wiki
- netmap vs srcnat/dstnat: IP Firewall rules, need help with optimization – MikroTik RouterOS
I like these ones as they use Winbox:
- Mikrotik – Setup – Powered by Kayako Help Desk Software
- Manual:Initial Configuration – MikroTik Wiki
Sharing Ideas … Mikrotik with Kannel/playSMS
- via: Mikrotik Related | Syed Jahanzaib Personal Blog to Share Knowledge !
- Mikrotik Firewall / Short Notes + Scripts
Connect CCR1009 with CSR226 over a longer distance than 3 meter – MikroTik RouterOS
Graphing: ensure you only limit this to IP-addresses that you want graphs to be visible on (0.0.0.0/0 makes it visible to ALL): Manual:Tools/Graphing – MikroTik Wiki
DNS – MikroTik RouterOS: I would like to have my router to stop all the DNS coming from my clients and not reaching my ISP provider.
Email sending can now also use the DNS-name of the SMTP server: Why does the email server configuration only allow IP-addresses? – MikroTik RouterOS
Dynamic DNS Update Script for No-IP DNS for Router OS V.6.7 – MikroTik RouterOS
Script for Ransomware Tracker by abuse.ch. Tracking Ransomware Infrastructure around the globe. Source: How I fight ransomware (crypto viruses) with Mikrotik – MikroTik RouterOS
/ip firewall mangle add chain=prerouting action=change-ttl new-ttl=increment:1
very simple solution for a traceroute to Hide ip address – MikroTik RouterOS
Using staged address list to perform Bruteforce login prevention – MikroTik Wiki

Very advanced stuff:

Packet flow (maybe the toughest part to wrap your head around):

Manual:Packet Flow – MikroTik Wiki (with diagrams on RouterOS 6.x and 3.x can flow).
Manual:Packet Flow v6 – MikroTik Wiki (with updated RouterOS 6.x diagram).
New Packet flow diagram – Page 2 – MikroTik RouterOS (Visio / PDF version of an even newer diagram)

Scripts:

Load balancing:

Syntax highlighting:

Syntax highlighting and completions for Sublime Text – MikroTik RouterOS
- See also: mikrotik/editors/Sublime3 at master · martinclaro/mikrotik and mikrotik/editors/Sublime2 at master · martinclaro/mikrotik and Kentzo/MikrotikScript: Syntax highlighting and completions for the Mikrotik Scripting language for the Sublime Text editor
external editor syntax highlighting – MikroTik RouterOS (Notepad++, Textpad, VIM, EditPlus – look for the word Download and the .zip, .rar and .gz extensions)
- See also: mikrotik/syntax at master · olejor/mikrotik
Atom: language-routeros-script and ofstudio/atom-language-routeros-script: MikroTik RouterOS script language support in Atom
TextMate2: tiktuk / RouterOS.tmbundle — Bitbucket
GEdit: webpagetech/gedit-routeros: Mikrotik RouterOS code syntax highlighting for .rsc Files
Notepad++: jtroybailey/RouterOS-Notepad—Syntax-Highlighting: Syntax highlighting for routeros exports in notepad++

Pictures

CCR1009-8G-1S-1S+ General info & Questions – MikroTik RouterOS

Very well written blog:

Manito Network’s Mikrotik solutions blog. In-depth articles on Mikrotik routing, security, best practices, VPN, and more.

Source: Mikrotik — Manito Networks

Solutions for RouterOS-based Mikrotik networks. Includes security and best practices, VPN, routing, switching, and more.

Source: Mikrotik-1 — Manito Networks

–jeroen

Posted in Internet, IPSec, MikroTik, Network-and-equipment, OpenVPN, Power User, PPTP, Routers, VPN | Leave a Comment »

Windows PPTP – How to Create a VPN Server on Your Windows Computer Without Installing Any Software

Posted by jpluimers on 2016/07/18

Windows has the built-in ability to function as VPN server, although this option is hidden. This trick works on both Windows 7 and Windows 8. The server uses the point-to-point tunneling protocol (PPTP.)

Source: How to Create a VPN Server on Your Windows Computer Without Installing Any Software

One day this might come in handy though I need to investigate a bit more on PPTP security issues first: might need to go for L2TP/IPsec instead.

Later: indeed, I should follow Don’t use PPTP, and don’t use IPSEC-PSK either (via: CloudCracker blog)

–jeroen

Posted in IPSec, Network-and-equipment, Power User, PPTP, VPN, Windows, Windows 10, Windows 7, Windows 8, Windows 8.1 | 1 Comment »

Setting up a PPTP connection on Mac OS X Lion

Posted by jpluimers on 2013/07/05

Easy, but worth viewing the screenshots: IPredator – Setting up a PPTP connection on Mac OS X Lion.

Although: I should follow Don’t use PPTP, and don’t use IPSEC-PSK either (via: CloudCracker blog)

–jeroen

Posted in Apple, IPSec, Mac, Mac OS X / OS X / MacOS, Mac OS X 10.7 Lion, MacBook, MacBook Retina, MacBook-Air, MacBook-Pro, Network-and-equipment, OS X 10.8 Mountain Lion, Power User, PPTP, VPN | Leave a Comment »

Don’t use PPTP, and don’t use IPSEC-PSK either (via: CloudCracker blog)

Posted by jpluimers on 2013/06/24

A while ago, I had to connect to secure data over PPTP.

It reminded me of this post from about a year ago: via Divide and Conquer: Cracking MS-CHAPv2 with a 100% success rate (now archived at the wayback machine).

Their main point:

MS-CHAPv2 can be cracked within less than a day (and that time will only get less).

Their short conclusion “basically PPTP is dead, and IPSEC-PSK is worse” leads to the recommendation:

This leaves either an OpenVPN configuration, or IPSEC in certificate rather than PSK mode.

Longer quote: Read the rest of this entry »

Posted in IPSec, Network-and-equipment, Power User, PPTP, Security, VPN | 3 Comments »

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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘PPTP’ Category

Reminder to self: when your PPTP server is behind a NAT, forward both GRE protocol and TCP port 1723

Some links for MikroTik tips and scripts

Windows PPTP – How to Create a VPN Server on Your Windows Computer Without Installing Any Software

Setting up a PPTP connection on Mac OS X Lion

Don’t use PPTP, and don’t use IPSEC-PSK either (via: CloudCracker blog)

The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

Subscribe

Archives

Recent Comments

Recent Posts

Blog Stats

Meta title

Tag Cloud Title

Top Clicks

Top Posts

My badges

Twitter Updates

My Flickr Stream

Pages

All categories

Email Subscription

Archive for the ‘PPTP’ Category

Reminder to self: when your PPTP server is behind a NAT, forward both GRE protocol and TCP port 1723

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Some links for MikroTik tips and scripts

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Windows PPTP – How to Create a VPN Server on Your Windows Computer Without Installing Any Software

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Setting up a PPTP connection on Mac OS X Lion

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Don’t use PPTP, and don’t use IPSEC-PSK either (via: CloudCracker blog)

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