Enable PPTP Split Tunneling
PPTP Split Tunneling KB ID 0000997 Problem I was asked yesterday, “When you get five minutes, I need you to enable PPTP split tunneling, because when I VPN into a network I lose Internet connectivity”. On inspection he was using the Microsoft VPN client, I jumped on the VPN device to discover it was a Cisco IOS router. What I discovered was, unlike the firewall VPN’s I’m used to, you DONT set split...
Juniper JUNOS SRX NAT – Static ‘One-to-One’
SRX NAT KB ID 0000995 Problem Setting up ‘Static NAT’ is the process of taking one of your ‘spare’ public IP addresses, and permanently mapping that public IP to a private IP address on your network. In the example above I want to give my web sever which has an internal IP address of 192.168.1.10/24, the public IP address of 1.1.1.5/24. So if someone out on the Internet wants to view my website, they can...
Juniper SRX Commit Errors
SRX Commit Errors KB ID 0000999 Problem WARNING: This article is not to cover every problem that will stop you committing the firewall config. It just serves to document problems I’ve encountered, and I how I overcame them. Solution: SRX Commit Errors I came across the following two problems whilst attempting to setup a ‘chassis cluster’. both were related to configuration existing on interfaces that I wanted to use...
Connecting GNS3 to VMware Workstation
GNS3 to VMware KB ID 0000996 Problem A while back I got an email “Here is a suggestion for an article. ‘How to link GNS3 with VMware Workstation'”. Sorry it’s taken me so long to get round to it, here you go Daniel Newton. Solution: GNS3 to VMware Before we start I’m assuming you have installed VMware Workstation, and you’ve installed and configured GNS3. 1. Launch VMware Workstation > Edit >...
CentOS TFTP Server (Install and Configure)
CentOS TFTP Server KB ID 0000998 Problem I needed to back up a Cisco firewall, and perform an upgrade remotely, despite my best efforts to use the ASDM and update via http, I had to go ‘old school’ and bring up a TFTP server on one of my CentOS Linux servers. Solution CentOS TFTP Server 1. Log onto the server and install the xinetd TFTP Server. Execute the following command and follow the on-screen prompts. Using username...