Access lists

Another post from times when I was preparing to my CCNA exam. This time my notes about ACLs in Cisco routers.

• ACLs provide IP route filtering


• ACLs identify interesting traffic for DDR


• ACLs provide lists for NAT


• 1-99 standard lists


• 100-199 and 2000–2699 extended lists


• For extended acls filter packets as close to the source as possible


• For standard acls filter packets as close to the destination as possible


• One access list can be configured per direction for each layer 3(IP, IPX…) protocol on interface

Configure ACL on line:

line vty 0 4

access class 3 in

Configure ACL on interface:

ip access-group

Show which access list and which direction is set:

show ip interface

Jabber

Configure ejabberd with AD integration

Ejabberd installation and operation guide

Another how to configure ejabberd with AD integration and shared roster(in russian)

Configure shared roster in ejabberd

Install Bandersnatch to log messages in ejabberd

Watch list of registered users:

ejabberdctl --node ejabberd@hostname vhost host.ru registered-users

Backup ejabberd database:

ejabberdctl backup path_to_file

DNS SRV records for jabber service. In BIND format.

For clients:

_xmpp-client._tcp.domain.com. IN SRV 0 0 42783 jabber.domain.com

For servers:

_jabber._tcp.domain.com. IN SRV 0 0 5269 jabber.domain.com.\\ _xmpp-server._tcp.domain.com. IN SRV 0 0 5269 jabber.domain.com.