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Feature/lab11 #902

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aed4260
docs: added PR template
RightRat42 Feb 9, 2026
1175979
Merge branch 'inno-devops-labs:main' into main
RightRat42 May 12, 2026
abd24ce
docs: pull sync for updated lab materials
RightRat42 May 12, 2026
a203af6
docs: add lab11 — nginx reverse proxy hardening; note: no cert bc roo…
RightRat42 May 12, 2026
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9 changes: 9 additions & 0 deletions .github/pull_request_template.md
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# Goal
Submitting my homework for lab#

# Changes
- Added submissionXX.md

# Checklist
- [x] Task 1 done
- [x] Task 2 done
15 changes: 15 additions & 0 deletions labs/lab11/analysis/headers-http.txt
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HTTP/1.1 308 Permanent Redirect
Server: nginx
Date: Tue, 12 May 2026 18:30:44 GMT
Content-Type: text/html
Content-Length: 164
Connection: keep-alive
Location: https://localhost:8443/
X-Frame-Options: DENY
X-Content-Type-Options: nosniff
Referrer-Policy: strict-origin-when-cross-origin
Permissions-Policy: camera=(), geolocation=(), microphone=()
Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Resource-Policy: same-origin
Content-Security-Policy-Report-Only: default-src 'self'; img-src 'self' data:; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'

21 changes: 21 additions & 0 deletions labs/lab11/analysis/headers-https.txt
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HTTP/2 200
server: nginx
date: Tue, 12 May 2026 18:31:00 GMT
content-type: text/html; charset=UTF-8
content-length: 75002
feature-policy: payment 'self'
x-recruiting: /#/jobs
accept-ranges: bytes
cache-control: public, max-age=0
last-modified: Tue, 12 May 2026 18:26:15 GMT
etag: W/"124fa-19e1d708bf8"
vary: Accept-Encoding
strict-transport-security: max-age=31536000; includeSubDomains; preload
x-frame-options: DENY
x-content-type-options: nosniff
referrer-policy: strict-origin-when-cross-origin
permissions-policy: camera=(), geolocation=(), microphone=()
cross-origin-opener-policy: same-origin
cross-origin-resource-policy: same-origin
content-security-policy-report-only: default-src 'self'; img-src 'self' data:; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'

12 changes: 12 additions & 0 deletions labs/lab11/analysis/rate-limit-test.txt
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401
401
401
401
401
401
429
429
429
429
429
429
227 changes: 227 additions & 0 deletions labs/lab11/analysis/testssl.txt
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#####################################################################
testssl.sh version 3.2.3 from https://testssl.sh/

This program is free software. Distribution and modification under
GPLv2 permitted. USAGE w/o ANY WARRANTY. USE IT AT YOUR OWN RISK!

Please file bugs @ https://testssl.sh/bugs/
#####################################################################

Using OpenSSL 1.0.2-bad (Mar 28 2025) [~183 ciphers]
on RatPC:/home/testssl/bin/openssl.Linux.x86_64

 Start 2026-05-12 18:36:40 -->> 127.0.0.1:8443 (localhost) <<--

A record via: /etc/hosts
rDNS (127.0.0.1): --
Service detected: HTTP

 Testing protocols via sockets except NPN+ALPN 

 SSLv2 not offered (OK)
 SSLv3 not offered (OK)
 TLS 1 not offered
 TLS 1.1 not offered
 TLS 1.2 offered (OK)
 TLS 1.3 offered (OK): final
 NPN/SPDY not offered
 ALPN/HTTP2 h2, http/1.1 (offered)

 Testing cipher categories 

 NULL ciphers (no encryption) not offered (OK)
 Anonymous NULL Ciphers (no authentication) not offered (OK)
 Export ciphers (w/o ADH+NULL) not offered (OK)
 LOW: 64 Bit + DES, RC[2,4], MD5 (w/o export) not offered (OK)
 Triple DES Ciphers / IDEA not offered
 Obsoleted CBC ciphers (AES, ARIA etc.) not offered
 Strong encryption (AEAD ciphers) with no FS not offered
 Forward Secrecy strong encryption (AEAD ciphers) offered (OK)


 Testing server's cipher preferences 

Hexcode Cipher Suite Name (OpenSSL) KeyExch. Encryption Bits Cipher Suite Name (IANA/RFC)
-----------------------------------------------------------------------------------------------------------------------------
SSLv2
-
SSLv3
-
TLSv1
-
TLSv1.1
-
TLSv1.2 (server order)
xc030 ECDHE-RSA-AES256-GCM-SHA384 ECDH 256 AESGCM 256 TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384
xc02f ECDHE-RSA-AES128-GCM-SHA256 ECDH 256 AESGCM 128 TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
TLSv1.3 (server order)
x1302 TLS_AES_256_GCM_SHA384 ECDH/MLKEM AESGCM 256 TLS_AES_256_GCM_SHA384
x1303 TLS_CHACHA20_POLY1305_SHA256 ECDH/MLKEM ChaCha20 256 TLS_CHACHA20_POLY1305_SHA256
x1301 TLS_AES_128_GCM_SHA256 ECDH/MLKEM AESGCM 128 TLS_AES_128_GCM_SHA256

 Has server cipher order? yes (OK) -- TLS 1.3 and below


 Testing robust forward secrecy (FS) -- omitting Null Authentication/Encryption, 3DES, RC4 

 FS is offered (OK)  TLS_AES_256_GCM_SHA384
TLS_CHACHA20_POLY1305_SHA256
ECDHE-RSA-AES256-GCM-SHA384
TLS_AES_128_GCM_SHA256
ECDHE-RSA-AES128-GCM-SHA256
 KEMs offered X25519MLKEM768
 Elliptic curves offered: prime256v1 secp384r1 secp521r1 X25519 X448
 Finite field group: ffdhe2048 ffdhe3072
 TLS 1.2 sig_algs offered: RSA-PSS-RSAE+SHA256 RSA-PSS-RSAE+SHA384
RSA-PSS-RSAE+SHA512 RSA+SHA256 RSA+SHA384
RSA+SHA512 RSA+SHA224
 TLS 1.3 sig_algs offered: RSA-PSS-RSAE+SHA256 RSA-PSS-RSAE+SHA384
RSA-PSS-RSAE+SHA512

 Testing server defaults (Server Hello) 

 TLS extensions (standard) "server name/#0" "max fragment length/#1"
"supported_groups/#10" "EC point formats/#11"
"application layer protocol negotiation/#16"
"extended master secret/#23" "session ticket/#35"
"supported versions/#43" "key share/#51"
"renegotiation info/#65281"
 Session Ticket RFC 5077 hint 600 seconds, session tickets keys seems to be rotated < daily
 SSL Session ID support yes
 Session Resumption Tickets: yes, ID: yes
 TLS clock skew Random values, no fingerprinting possible
 Certificate Compression none
 Client Authentication none
 Signature Algorithm SHA256 with RSA
 Server key size RSA 2048 bits (exponent is 65537)
 Server key usage --
 Server extended key usage --
 Serial 027BD549B41901039AD7D85B1422A72D3AB72F8A (OK: length 20)
 Fingerprints SHA1 B1DE6E090444231B892E65993C27F29F690C3B71
SHA256 58AAE04A77E079638D58AE16642F384E5F5627BE8E5D71741CC70A42EC3CCB62
 Common Name (CN) localhost 
 subjectAltName (SAN) localhost 127.0.0.1 0:0:0:0:0:0:0:1 
 Trust (hostname) Ok via SAN and CN (same w/o SNI)
 Chain of trust NOT ok (self signed)
 EV cert (experimental) no
 Certificate Validity (UTC) 364 >= 60 days (2026-05-12 18:26 --> 2027-05-12 18:26)
 ETS/"eTLS", visibility info not present
 Certificate Revocation List --
 OCSP URI --
NOT ok -- neither CRL nor OCSP URI provided
 OCSP stapling not offered
 OCSP must staple extension --
 DNS CAA RR (experimental) not offered
 Certificate Transparency --
 Certificates provided 1
 Issuer localhost
 Intermediate Bad OCSP (exp.) Ok


 Testing HTTP header response @ "/" 

 HTTP Status Code  200 OK
 HTTP clock skew 0 sec from localtime
 Strict Transport Security 365 days=31536000 s, includeSubDomains, preload
 Public Key Pinning --
 Server banner nginx
 Application banner --
 Cookie(s) (none issued at "/")
 Security headers X-Frame-Options: DENY
X-Content-Type-Options: nosniff
Content-Security-Policy-Report-Only: default-src
'self'; img-src 'self' data:; script-src 'self'
'unsafe-inline' 'unsafe-eval'; style-src 'self'
'unsafe-inline'
Permissions-Policy: camera=(), geolocation=(),
microphone=()
Cross-Origin-Opener-Policy: same-origin
Cross-Origin-Resource-Policy: same-origin
Permissions-Policy: camera=(), geolocation=(),
microphone=()
Referrer-Policy: strict-origin-when-cross-origin
Cache-Control: public, max-age=0
 Reverse Proxy banner --


 Testing vulnerabilities 

 Heartbleed (CVE-2014-0160) not vulnerable (OK), no heartbeat extension
 CCS (CVE-2014-0224) not vulnerable (OK)
 Ticketbleed (CVE-2016-9244), experiment. not vulnerable (OK)
 ROBOT Server does not support any cipher suites that use RSA key transport
 Secure Renegotiation (RFC 5746) supported (OK)
 Secure Client-Initiated Renegotiation not vulnerable (OK)
 CRIME, TLS (CVE-2012-4929) not vulnerable (OK)
 BREACH (CVE-2013-3587) no gzip/deflate/compress/br HTTP compression (OK)  - only supplied "/" tested
 POODLE, SSL (CVE-2014-3566) not vulnerable (OK), no SSLv3 support
 TLS_FALLBACK_SCSV (RFC 7507) No fallback possible (OK), no protocol below TLS 1.2 offered
 SWEET32 (CVE-2016-2183, CVE-2016-6329) not vulnerable (OK)
 FREAK (CVE-2015-0204) not vulnerable (OK)
 DROWN (CVE-2016-0800, CVE-2016-0703) not vulnerable on this host and port (OK)
make sure you don't use this certificate elsewhere with SSLv2 enabled services, see
https://search.censys.io/search?resource=hosts&virtual_hosts=INCLUDE&q=58AAE04A77E079638D58AE16642F384E5F5627BE8E5D71741CC70A42EC3CCB62
 LOGJAM (CVE-2015-4000), experimental not vulnerable (OK): no DH EXPORT ciphers, no DH key detected with <= TLS 1.2
 BEAST (CVE-2011-3389) not vulnerable (OK), no SSL3 or TLS1
 LUCKY13 (CVE-2013-0169), experimental not vulnerable (OK)
 Winshock (CVE-2014-6321), experimental not vulnerable (OK)
 RC4 (CVE-2013-2566, CVE-2015-2808) no RC4 ciphers detected (OK)


 Running client simulations (HTTP) via sockets 

Browser Protocol Cipher Suite Name (OpenSSL) Forward Secrecy
------------------------------------------------------------------------------------------------
Android 7.0 (native) TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256 bit ECDH (P-256)
Android 8.1 (native) TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 253 bit ECDH (X25519)
Android 9.0 (native) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
Android 10.0 (native) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
Android 11/12 (native) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
Android 13/14 (native) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
Android 15 (native) TLSv1.3 TLS_AES_256_GCM_SHA384 X25519MLKEM768
Chrome 101 (Win 10) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
Chromium 137 (Win 11) TLSv1.3 TLS_AES_256_GCM_SHA384 X25519MLKEM768
Firefox 100 (Win 10) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
Firefox 137 (Win 11) TLSv1.3 TLS_AES_256_GCM_SHA384 X25519MLKEM768
IE 8 Win 7 No connection
IE 11 Win 7 No connection
IE 11 Win 8.1 No connection
IE 11 Win Phone 8.1 No connection
IE 11 Win 10 TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256 bit ECDH (P-256)
Edge 15 Win 10 TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 253 bit ECDH (X25519)
Edge 101 Win 10 21H2 TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
Edge 133 Win 11 23H2 TLSv1.3 TLS_AES_256_GCM_SHA384 X25519MLKEM768
Safari 18.4 (iOS 18.4) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
Safari 15.4 (macOS 12.3.1) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
Safari 18.4 (macOS 15.4) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
Java 7u25 No connection
Java 8u442 (OpenJDK) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
Java 11.0.2 (OpenJDK) TLSv1.3 TLS_AES_256_GCM_SHA384 256 bit ECDH (P-256)
Java 17.0.3 (OpenJDK) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
Java 21.0.6 (OpenJDK) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
go 1.17.8 TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
LibreSSL 3.3.6 (macOS) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
OpenSSL 1.0.2e TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256 bit ECDH (P-256)
OpenSSL 1.1.1d (Debian) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
OpenSSL 3.0.15 (Debian) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)
OpenSSL 3.5.0 (git) TLSv1.3 TLS_AES_256_GCM_SHA384 X25519MLKEM768
Apple Mail (16.0) TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256 bit ECDH (P-256)
Thunderbird (91.9) TLSv1.3 TLS_AES_256_GCM_SHA384 253 bit ECDH (X25519)


 Rating (experimental) 

 Rating specs (not complete) SSL Labs's 'SSL Server Rating Guide' (version 2009r from 2025-05-16)
 Specification documentation https://github.com/ssllabs/research/wiki/SSL-Server-Rating-Guide
 Protocol Support (weighted) 0 (0)
 Key Exchange (weighted) 0 (0)
 Cipher Strength (weighted) 0 (0)
 Final Score 0
 Overall Grade T
 Grade cap reasons Grade capped to T. Issues with chain of trust
(self signed)

 Done 2026-05-12 18:37:17 [ 38s] -->> 127.0.0.1:8443 (localhost) <<--


22 changes: 22 additions & 0 deletions labs/lab11/logs/access.log
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172.19.0.1 - - [12/May/2026:18:26:12 +0000] "GET / HTTP/1.1" 308 164 "-" "curl/8.20.0" rt=0.000 uct=- urt=-
172.19.0.1 - - [12/May/2026:18:30:44 +0000] "HEAD / HTTP/1.1" 308 0 "-" "curl/8.20.0" rt=0.000 uct=- urt=-
172.19.0.1 - - [12/May/2026:18:31:00 +0000] "HEAD / HTTP/2.0" 200 0 "-" "curl/8.20.0" rt=0.007 uct=0.001 urt=0.007
172.19.0.1 - - [12/May/2026:18:36:40 +0000] "GET / HTTP/1.1" 200 75002 "-" "TLS tester from https://testssl.sh/" rt=0.004 uct=0.001 urt=0.005
172.19.0.1 - - [12/May/2026:18:36:57 +0000] "GET / HTTP/1.1" 200 75002 "-" "TLS tester from https://testssl.sh/" rt=0.002 uct=0.000 urt=0.001
172.19.0.1 - - [12/May/2026:18:36:58 +0000] "GET / HTTP/1.1" 200 75002 "-" "TLS tester from https://testssl.sh/" rt=0.001 uct=0.000 urt=0.001
172.19.0.1 - - [12/May/2026:18:37:04 +0000] "GET / HTTP/1.1" 200 75002 "https://google.com/" "TLS tester from https://testssl.sh/" rt=0.001 uct=0.000 urt=0.002
172.19.0.1 - - [12/May/2026:18:45:26 +0000] "POST /rest/user/login HTTP/2.0" 401 26 "-" "curl/8.20.0" rt=0.024 uct=0.000 urt=0.025
172.19.0.1 - - [12/May/2026:18:45:26 +0000] "POST /rest/user/login HTTP/2.0" 401 26 "-" "curl/8.20.0" rt=0.009 uct=0.000 urt=0.009
172.19.0.1 - - [12/May/2026:18:45:26 +0000] "POST /rest/user/login HTTP/2.0" 401 26 "-" "curl/8.20.0" rt=0.016 uct=0.000 urt=0.016
172.19.0.1 - - [12/May/2026:18:45:26 +0000] "POST /rest/user/login HTTP/2.0" 401 26 "-" "curl/8.20.0" rt=0.008 uct=0.000 urt=0.007
172.19.0.1 - - [12/May/2026:18:45:26 +0000] "POST /rest/user/login HTTP/2.0" 401 26 "-" "curl/8.20.0" rt=0.006 uct=0.001 urt=0.007
172.19.0.1 - - [12/May/2026:18:45:26 +0000] "POST /rest/user/login HTTP/2.0" 401 26 "-" "curl/8.20.0" rt=0.006 uct=0.000 urt=0.007
172.19.0.1 - - [12/May/2026:18:45:26 +0000] "POST /rest/user/login HTTP/2.0" 429 162 "-" "curl/8.20.0" rt=0.000 uct=- urt=-
172.19.0.1 - - [12/May/2026:18:45:26 +0000] "POST /rest/user/login HTTP/2.0" 429 162 "-" "curl/8.20.0" rt=0.000 uct=- urt=-
172.19.0.1 - - [12/May/2026:18:45:26 +0000] "POST /rest/user/login HTTP/2.0" 429 162 "-" "curl/8.20.0" rt=0.000 uct=- urt=-
172.19.0.1 - - [12/May/2026:18:45:26 +0000] "POST /rest/user/login HTTP/2.0" 429 162 "-" "curl/8.20.0" rt=0.000 uct=- urt=-
172.19.0.1 - - [12/May/2026:18:45:26 +0000] "POST /rest/user/login HTTP/2.0" 429 162 "-" "curl/8.20.0" rt=0.000 uct=- urt=-
172.19.0.1 - - [12/May/2026:18:45:26 +0000] "POST /rest/user/login HTTP/2.0" 429 162 "-" "curl/8.20.0" rt=0.000 uct=- urt=-
172.19.0.1 - - [12/May/2026:18:46:37 +0000] "GET / HTTP/1.1" 400 248 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0" rt=0.000 uct=- urt=-
172.19.0.1 - - [12/May/2026:18:46:37 +0000] "GET /favicon.ico HTTP/1.1" 400 248 "http://localhost:8443/" "Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0" rt=0.000 uct=- urt=-
172.19.0.1 - - [12/May/2026:18:47:21 +0000] "GET /rest/user/login HTTP/1.1" 400 248 "-" "Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0" rt=0.000 uct=- urt=-
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