Tag: HSRP

Configuration Example, Routing

HSRP and ACL’s

RenĂ© Jorissen on October 1, 2008 • 0 Comments • Tags: #1985 #access #access-list #acl #hot #hsrp #list #multicast #protocol #routing #standby #udp

I added a Guest VLAN to a network environment with two multi layer switches running HSRP. To secure the internal network from the Guest VLAN, I added a ACL to the Guest VLAN SVI. The ACL is stated below: ip access-list extended GUEST-DENY-RFC1918 remark Allow DHCP permit udp any eq bootpc any remark Deny RFC … Read More

Configuration Example, Routing, Security, Switching

Secure HSRP configuration

RenĂ© Jorissen on July 25, 2008 • 2 Comments • Tags: #authenticate #cdp #clear #dtp #hsrp #key-string #md5 #preempt #priority #spoofing #standby #text #timeout #wireshark #yersinia

A friend of mine works for a well known auditing and penetration testing company in the Netherlands. Recently we were talking about how he starts looking for flaws in network infrastructures. My friend told me that the first thing he does is simply starting WireShark and start looking at all the packets he receives. By … Read More