Inter-networking ( Routers )

Cisco Router information / configurations / hints.

Yesterday I walked into a problem that the Cisco ISR 897VA was rebooted due to a power failure in the building. There was a preload update of the IOS software. The Software which was preloaded were: c800-universalk9-mz.SPA.156-2.T1.bin. After the reboot, the router came up. but there was not a proper connection. After checking that the…

Read More Cisco 897VA and Orange France compatibility issue

Lately I’m busy to configure Cisco IOS routers in combination with Remote offices where we place Meraki Appliances (like the MX64, MX65 or the Z1) When we do this we create also a VPN connection (site to site). In this setup the Main office has a Cisco IOS router. Configuration of the Main Office. (Cisco…

Read More Cisco | Cisco IOS router to Meraki Appliance | site-to-site VPN with Zone based Firewalling

Since a couple of years actually I noticed that when I use recent IOS versions on a Cisco ISR device. That there are some struggles with NAT rules in combination with a VPN client. In somecases you have to put the access-list for the NAT rule with a Permit like below. ip access-list extended ACL_OUTSIDE_NO_NAT…

Read More Cisco | IOS version difference in case of use NO_NAT

In addition of my previous post “Cisco – Office 365 | Office 365 IP object range on a Cisco ASA” You might need it on a Cisco IOS router. It can happen that you need to configure an IP object range for office 365. I most cases this is because you have a policy that…

Read More Cisco – Office 365 | Office 365 IP object range on a Cisco IOS Router

Solved a problem with a Cisco IOS router in combination with office365. In the situation they used a proxy server from Trustwave Webmarshal. On the cisco router was configured that port 80 and 443 for users were denied so the users had to use the proxy server to go online. Webmarshal configuration: Needed information for…

Read More Office 365 installation / communication issues, with Cisco IOS router and Trustwave Webmarshal.

Basic information The Cisco IOS router contains the IOS version c2900-universalk9-mz.SPA.152-4.M4.bin. Both Cisco ASA’s 5505 contains the ASA software version 8.0(5) The Scenario will look like this: First I will explain the configuration of the IOS router. Cisco IOS 2921 configuration First the vpn configuration (site to site). This configuration contains also a VPN Client…

Read More Cisco | How to connect 2 Cisco ASA’s 5505 to a Cisco IOS Router 2921

How to setup a Net IPv6 DHCP Scope. I start first with the configuration of the Cisco IOS router. Keep the router configuration as simple as possible for enabling ipc6 traffic. Ipv6 is working good you can proceed further with the security on the IOS Router. Router configuration. IPV6 dns servers previder ip name-server 2001:1690:1:A::53…

Read More Windows 2012 DHCP ivp6 and Cisco IOS Router configuration

Few days ago. Me and my colleague were struggling with a configuration to enable internet access to a Fiber internet connection of KPN (it wasn’t a business line but a home user internet connection) To enable this configuration. You can do the following: On the internet interface (we used a HWIC-4ESW) the following commands. (With…

Read More Cisco IOS Router | Enable configuration for KPN Customer Fiber Internet (KPN Glasvezel Particulier)

Today I faced the problem to create a U-Turn on a IOS router for Cisco VPN Clients. The Red line is the internet traffic which is going to be used over the Cisco VPN client and the blue line is the normal internal LAN traffic. Well no I know how to do it and it…

Read More How to create a U-Turn on a Cisco IOS Router for a Cisco VPN Client