Author Archives: itdoctor - Page 29
GRE keepalives in an existing IPsec tunnel
When you setup a GRE tunnel through an existing ipsec – the keepalives should be turn off , if you turn on keepalives the tunnel will never be up...
IPsec between Strongswan on AWS and Cisco IOS behind a NAT
My Strongswan : Local IP: Elastic IP: OS: Ubuntu My WAN: – Customer grade broadband Internet – Public – connect to my fiber optics – Local...
Strongswan: allow client to access internet
2 sites vpn works well, they can see each other. but i want to send all internet from my remote sites to my strongswan including the internet. This need...
Strongswan: IPsec VPN – https error
i have 2 sites vpn between Strongswan and Cisco 1841 , the vpn works well , but there is a problem , some of ssl website could not open...
How to use and exit minicom ?
minicom -s (this is to configure the terminal) to exit minicom Press Ctrl – A , select Z , select X
Cisco networking : access-list and access-class
When we apply an access-list to our router/switch, take this note: To apply an access list to a virtual terminal interface we must use the “access-class” command. This is...
Cisco Router: block ping from internet
Let say we have a router , it’s connected to internet via interface Fa0/1. For security reason, we don’t want internet use to ping our router. We need to...
ntc – tempalates :cisco_ios_show_mac-address-table.template
#add this line in Type 3 - ^${VLAN}\s+${DESTINATION_ADDRESS}\s+${TYPE}\s+\S+\s+${DESTINATION_PORT} -> Record Value DESTINATION_ADDRESS (\w+.\w+.\w+) Value TYPE (\w+) Value VLAN (\w+) Value DESTINATION_PORT (\S+) Start ^Destination\s+Address\s+Address\s+Type\s+VLAN\s+Destination\s+Port -> TYPE1 ^\s+vlan\s+mac address\s+type\s+learn\s+age\s+ports ->...
Nagios: Sorry, but Nagios is currently not checking for external commands, so your command will not be committed!
When you tried to stop Nagios to monitor some services from web interfaces – you see the message below: Sorry, but Nagios is currently not checking for external commands,...
Mysql to Postgres – column header in query – it’s all in lower case
By default when we run an query in postgres sql (psql) , all the table header is in lowercase , this is different with mysql. To keep the header...