Category: Quick Notes

Routing on F5 via mngt interface

If you configure your LTM F5 device to use TACACS authentication you must configure the routing properly. Continue Reading

EIGRP and OSPF advertised routes

Today I was examining what happens if a router learned a route via EIGRP which is also known via static route entry. Continue Reading

Routing table investigation: longer-prefixes keyword

When router makes decision which route use to forward a packet then the route with the longest match is used. “Longest match” means the route with the longest mask. Continue Reading

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

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