use virtualbox image in IS

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login/passwd for virtual OS
- user/PA197

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Section mitmproxy

- terminal (su) + Firefox
- Firefox proxy config: localhost:8080 for all protocols
- open zriha.cz (should fail)
- run mitmproxy
- open mitm.it select "other" and install certificate

- retry zriha.cz
- in mitmproxy browse the queries (up, down, enter, q + tab, up, down)
- open http://www.fi.muni.cz/~zriha/form/
- fill the form and submit
- browse the command/response
- go back; test age of 200
- set modify filter in mitmproxy: i -> ~q
- resubmit form with age small
- see the request: enter, e, form, 20->200, q, a
- see the response in firefox
- cancel the modify filter in mitmproxy (i)
- autoreplace: mitmproxy --replace /~q/age=33/age=333
- test with age 30 and age 33
- quit mitmproxy

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Section tinyproxy:
- view /etc/tinyproxy/tinyproxy.conf (port is 8888)
- configure firefox (localhost:8888)
- run tinyproxy: systemctl start tinyproxy.service
- run tail -f /var/log/tinyproxy/tinyproxy.log
- visit zriha.cz in firefox (and see the log in tinyproxy)

- dnf download --source tinyproxy
- rpm -i tiny*.rpm
- cd ~/rpmbuild/SPECS
- yum install asciidoc
- rpmbuild -bc tinyproxy.spec
- cd /root/rpmbuild/BUILD/tinyproxy-1.8.3/src
- systemctl stop tinyproxy.service
- ./tinyproxy -d
- reload a webpage (it should work)
- ctrl+c
- vi reqs.c
- in function relay_connection() after last_access = time (NULL) add a new line (~line 1176):
  printf("Request: '%s'\n", connptr->request_line);
- make
- ./tinyproxy -d
- reload a webpage (should work and tinyproxy shows lines on screen)