Troubleshoot VLANs and Trunks

This post lists the commands useful for troubleshooting VLAN and Trunk ports on Cisco switch. Continue Reading

Troubleshoot Ethernet port

Many times when a single user reports problem with his network connection you start troubleshooting from checking the state of Ethernet port on the switch. Continue Reading

Hairpin Connectivity and NAT considerations

By default Cisco ASA will not forward the packets back out the same interface upon which they arrived. Continue Reading

AnyConnect VPN – Split Tunneling

By default all traffic originated from Cisco AnyConnect client is forwarded to Cisco ASA. Continue Reading

Identity NAT

There are some situations when you configure Identity NATContinue Reading

IPSEC configuration

This post contains short notes about IPSCEC configuration and validations on Cisco router. Continue Reading

IPSEC notes

This post contains short notes about VPN technology.
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Firewall – FTP notes

Every now and then there is a need to unblock ftp traffic on a firewall. Continue Reading

BGP notes

This post contains notes about BGP operation and configuration. Continue Reading

Cisco LAP – troubleshooting notes

This post contains notes related to troubleshooting Cisco LAPs and wireless clients. Continue Reading