Category: linux

Linux Stuff

icinga

building a large scaled monitoring system for a customer with icinga 1.4.0 + pnp4nagios 0.6 (bulk mode with npcd), db logging. it will monitor very different stuff …. from servers to network, from esx(i) to linux machines, from firewalls to printers … good to see that all the needed software comes from the debian stable repositories (non-free). once again debian FTW !

http://docs.pnp4nagios.org/pnp-0.6/start

https://www.icinga.org/

Ipsec tunnel / openswan <-> juniper ssg5

finally got it working: building a bidirectional ipsec tunnel between a juniper ssg5 and openswan@debian, both sites got static ip adresses

openswan config:


conn juniper_ssg5_01
type=tunnel
authby=secret
auth=esp
pfs=yes
rekey=yes
auto=start
keylife=8h
keyingtries=0
keyexchange=ike
ike=aes256-sha1-modp2048
esp=aes256-sha1
# Linux openswan
leftid=1.1.1.1
left=1.1.1.1 # expernal ip
leftsubnet=10.1.10.0/24
leftsourceip=10.1.10.1
# SSG 5
rightid=2.2.2.2
right=2.2.2.2 # untrust interface
rightsubnet=192.168.10.0/24

juniper screenos config / route based config


set interface "tunnel.2" zone "Untrust"
set ike p1-proposal "g14-esp-aes256-sha" preshare group14 esp aes256 sha-1 second 28800
set ike p2-proposal "g14-esp-aes256-sha" group14 esp aes256 sha-1 second 3600
set ike gateway "Gateway for 10.1.10.0/24" address 1.1.1.1 Main local-id "2.2.2.2" outgoing-interface "ethernet0/0" preshare "mysecretpsk" proposal "g14-esp-aes256-sha"
set ike gateway "Gateway for 10.1.10.0/24" nat-traversal
set ike gateway "Gateway for 10.1.10.0/24" nat-traversal udp-checksum
set ike gateway "Gateway for 10.1.10.0/24" nat-traversal keepalive-frequency 0
set ike accept-all-proposal
set ike respond-bad-spi 1
set ike ikev2 ike-sa-soft-lifetime 60
unset ike ikeid-enumeration
unset ike dos-protection
unset ipsec access-session enable
set ipsec access-session maximum 5000
set ipsec access-session upper-threshold 0
set ipsec access-session lower-threshold 0
set ipsec access-session dead-p2-sa-timeout 0
unset ipsec access-session log-error
unset ipsec access-session info-exch-connected
unset ipsec access-session use-error-log
set vpn "VPN for 10.1.10.0/24" gateway "Gateway for 10.1.10.0/24" replay tunnel idletime 0 proposal "g14-esp-aes256-sha"
set vpn "VPN for 10.1.10.0/24" id 0x3 bind interface tunnel.2
set vpn "VPN for 10.1.10.0/24" proxy-id local-ip 192.168.10.0/24 remote-ip 10.1.10.0/24 "ANY"
set policy id 34 from "Trust" to "Untrust" "Any" "10.1.10.0/24" "ANY" permit log count

ruby on rails

playing with ruby on rails (ror) – web application development framework; all the structure behind it, looks very nice (mvc). it`s possible to build really fast and easy something like “website with database backend and some functions” what “traditional” is made by php,css,html,*sql and/or….  maybe ror is a topic for our next summer training in bodman – OH ! we got to plan this …

learn:

http://tryruby.org/

http://railsforzombies.org/

http://rubyonrails.org/screencasts/rails3

http://rubyonrails.org/

funny merchandise statement (ror – website):

“Ruby on Rails is astounding. Using it is like watching a kung-fu movie, where a dozen bad-ass frameworks prepare to beat up the little newcomer only to be handed their asses in a variety of imaginative ways.”
-Nathan Torkington, O’Reilly Program Chair for OSCON

vmware / centos 5 network settings

copied vm centos 5 machines with fixed ip settings to a different esxi server. put the machines in a vm net with an active dhcp server. the centos machines switched at boot-time to dhcp and automatically disabled the fixed ip settings. centos creates a new interface configuration file with dhcp settings. the old config file is backed. why ? the mac adress has changed ! (vmware moving). to prevent this you should probably configure the mac adresses from the old esxi system or adjust the network cfg files on centos.

sync accountdata from mysql to openldap and active directory

working on a system to sync userdata from mysql to openldap *and* active directory. goal is to have synchronised systems (openldap/ad) and a webbased management – YEAH ! right now i`m playing with http://lsc-project.org/ – thx to the lsc irc – channel !

routing mail with exim4 to different mailservers

must do this to migrate mailboxes from exchange2k3 to exchange2010
i prefer postfix to do mta stuff but here we got exim4 …

the transport still exists (remote_smtp > 30_exim4-config_remote_smtp)

router:

special_routes:
driver = manualroute
domains = ! +local_domains
transport = remote_smtp
host_find_failed = defer
same_domain_copy_routing = yes
route_data = ${lookup{$domain}lsearch{/etc/exim4/routes}}

/etc/exim4/routes :
email@dumb.com: newmailserver.com
dumb.com: oldmailserver.com