Tasks 

● Design and operation of hybrid cloud solutions
● Design and operation of Internet service/access providers
● Design and operation of wireless networks

Software Stack

Commercial Software	Open Source Software
Cloud AWS Cloud, Cloud Sigma, Interroute, OpenShift	Cloud Openstack
DNS Windows Name Services (DNS and WINS)	DNS ISC Bind, djbdns
Email HCL Notes	Email Sendmail, Postfix, Exim, qmail, Cyrus  Imap, WU Imap
News Netscape News Server , Typhoon News  Server, Cyclone News Router	News ISC Innd, NNTPCache
Webserver Oracle Weblogic Server, IBM Websphere,  Oracle IAS , Netscape Enterprise,  Netscape Fasttrack, Microsoft IIS, Roxen	Webserver: Apache + mod_jserv/mod_jk  (Tomcat), mod_dav, mod_php
Proxy Services Trend Micro	Proxy Services Socks5, Squid, SquidGuard,  Apache/mod_proxy, stunnel
FileserverAndrew Filesystem, VxFS, SamFS	Fileserver Samba, NFS, OpenAFS
User-Management and AAA Kerberos, AFS, NIS, NIS+ RedHat SSO,Cisco Secure ACS	User-Management and AAA Keycloak, Kerberos, AFS, LDAP, PAM, Shibboleth, Tacacs+, IC-Radius, Freeradius