Author Archives: pim
Extending a Debian OpenVPN server with Multi Factor Authentication via Google Authenticator
I know it’s a mouth full.. but the few documents I found on the web were good yet at the same time still left some questions unanswered. So have a look at the PDF and I hope you’ll get it … Continue reading
Posted in Geen categorie
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Re-instating a revoked OpenVPN certificate
The OpenVPN documentation will tell you how to revoke a user-certificate but NOT how to re-instate one. (or at least I was unable to find it) So here is a recipe on how to do this, using the easy-rsa scripts:
Posted in Geen categorie
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Calculating DeciBels for eg Wi-Fi networks and the conversion to mW
When calculating DeciBels, bear in mind that it is always a comparative number, eg output as compared to input power. This can be used to compare aerial’s etc. Here are examples of typical dB values: 0dB = same power 3dB = 2 * power … Continue reading
Posted in Wi-FI Networking
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Creating an IPsec Dynamic VPN / Remote Access VPN on the SRX firewall for the Pulse Secure client, here on OsX
In the PDF below, I describe how to setup a Dynamic / Remote Access IPsec VPN on the Juniper SRX. The client in my case was an OsX machine running Mohave. Pulse secure worked admirably and can be downloaded for … Continue reading
Posted in Juniper-Junos
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If ip-monitoring does not work on an SRX cluster..
During a recent project, I built a Juniper SRX cluster where a Reth connected via a LAG to a switch, which in turn is connected it to the Internet. In case of a failure, they Reth should failover to the … Continue reading
Posted in Juniper-Junos
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Juniper SRX and Active and Passive FTP port forwarding
As you probably know, FTP comes in two flavours:-Active FTP where data port 20 is used on the Server and the client offers a random port > 1023 to the Server via a “Port” command. Hosting this behind a Juniper … Continue reading
Posted in Juniper-Junos
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A solution to the NAT traversal problem between a Nintendo Switch and the Juniper SRX Firewall.
I recently had to solve a problem with my son’s Nintendo Switch where the game called “Splatoon” would not find any Internet players because “there was a NAT traversal problem”. Googling told me the wildest stories from completely exposing the … Continue reading
Posted in Nintendo Switch
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