Designing Site-to-Site IPsec VPNs – Part 2
Crypto maps – used as one of the oldest Cisco IOS implementation options for IPsec – have a downside – they do not provide for a routable logical interface. When migrating from a traditional WAN or...
View ArticleDesigning Site-to-Site IPsec VPNs – Part 3
Site-to-site VPNs using IPsec can be implemented with the crypto maps or, when routed interface is needed, by GRE-tunnels. Virtual Tunnel Interfaces (VTIs) are a relatively late addition to Cisco IOS...
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The Power of NIL Monitor, Part 1
As part of NIL’s customer support division, my colleagues and I face customers’ networking problems daily. Trying to solve these problems quickly and efficiently – and get the maximum benefit out of...
View ArticleDance around the IOS bugs with EEM and Tcl
Recently, on an IPSec-based customer network, NIL installed one of the brand new platforms introduced by Cisco Systems. The initial software release had memory leaks (no problem, we all know these...
View ArticleDesigning Site-to-Site IPsec VPNs – Part 4
The legacy technologies such as leased lines or switched networks (Frame relay, ATM) have long been replaced by public Internet or MPLS. To secure the traffic between the Local Area Networks at remote...
View ArticleDesigning Site-to-Site IPsec VPNs – Part 5
Do you need an on-demand fully-meshed (any-to-any) topology using IPsec in your network? And you want simplicity in configuration? Among various implementations of the IPsec the Cisco`s Group Encrypted...
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