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When you configure a Web Security Proxy Profile with Sophos UTM (Astaro ASG) for your network with authentication mode on, some applications just want to go directly outside without to authenticate themselves like the network connection center in Windows Vista/7/8. The system trys to open a default specified URL which can be found at the registry: … Read more
Finally back from USA I will deliver you a new tutorial to update your ProCurve switches. In most cases you will need to do an update on the software because your new installed GBIC modules are not recognized. Don’t ever install directly to the newest version because most updates need a new Boot ROM, so … Read more
Tomorrow I’m flying to New York, later to Miami! I will be back in three weeks! NetworkGuy out! 😉 /edit NY is nice 😀
Today I will show you how to configure QoS for outgoing SIP VoIP traffic who goes throw a VPN tunnel / crypto-map. To solve this we need to create class-maps for all IP traffic and for our SIP traffic and bind them to the crypto map and the outgoing interface because VPN traffic is encapsulated … Read more
Today I will show you how to build a so called “Router-on-a-stick” environment. In this example we have one Cisco router, one HP ProCurve switch and three subnets: First we configure inspection firewall profiles, so when someone requests packets from the internet, packets can come back through our inbound WAN interface access-list ip inspect name … Read more
If you accidentally erased your flash or have a Cisco router with an empty flash, you can upload an IOS image from ROMmon to recover the device to a functional router. Connect your router via console-cable to a PC and use PuTTY to connect to your device. I use TFTPD32 from Philippe Jounin. When starting … Read more
You bought a used Cisco router at eBay configured with a password? You loose your password but still need the current configuration? No Problem! You can easily reset the configuration/passwords. You need to connect to the serial port of the Cisco router. I’m using always a USB-RS232-serial-adapter and PuTTY for this. To boot your router … Read more
I linked my twitter account with my LinkedIn Account 🙂 so now everyone can see my blogposts @ the LinkedIn start page. Does anyone know how to connect a XING profile with twitter?
In Germany some internetprovider doesn’t offer a static WAN IP address. So the easiest way to connect a branch office router via IPsec VPN protocol to the central network address is using a Cisco EasyVPN connection with network-extension mode. In this example we have two networks: The IP subnet of our mainoffice is 192.168.1.0 /24 … Read more
One of my customers has a separated network within their internal network. Mobile devices (Android Phones, iPhones, etc.) are connected to a consumer access point which is connected behind the Cisco Router 876: The Traveler service is also rechable via internet (configured with PAT pointed to the Traveler server). In the past, … Read more
