SSL Report: flatassembler.net (208.99.203.253)
Assessed on:  Fri, 12 Sep 2025 20:24:51 UTC | Clear cache
Scan Another »

Due to a recently discovered bug in Apple's code, your browser is exposed to MITM attacks. Click here for more information.

Summary
Overall Rating
B
0
20
40
60
80
100
Certificate
 
Protocol Support
 
Key Exchange
 
Cipher Strength
 

Visit our documentation page for more information, configuration guides, and books. Known issues are documented here.
This server does not support Forward Secrecy with the reference browsers. Grade capped to B.  MORE INFO »
This server does not support Authenticated encryption (AEAD) cipher suites. Grade capped to B.  MORE INFO »
This server supports TLS 1.0 and TLS 1.1. Grade capped to B. MORE INFO »
This server does not support TLS 1.3.  MORE INFO »
HTTP Strict Transport Security (HSTS) with long duration deployed on this server.  MORE INFO »
DNS Certification Authority Authorization (CAA) Policy found for this domain.  MORE INFO »
Certificate #1: RSA 2048 bits (SHA256withRSA)
Server Key and Certificate #1
Subject flatassembler.net
Fingerprint SHA256: 8b7f09e34ee6165c5bdc96a3d6f0ecc34f212d3d5ff497f7c39eafe806533c1a
Pin SHA256: HjtMmDWcZOB0EqGkxcr6piOakNkSER5TDPLmReKTHmM=
Common names flatassembler.net
Alternative names arm.flatassembler.net board.flatassembler.net contest.flatassembler.net fasmcon.flatassembler.net flatassembler.net fresh.flatassembler.net www.flatassembler.net
Serial Number 06a2a11ac6bbb83fd230f90c020b89902a65
Valid from Wed, 03 Sep 2025 18:10:28 UTC
Valid until Tue, 02 Dec 2025 18:10:27 UTC (expires in 2 months and 19 days)
Key RSA 2048 bits (e 65537)
Weak key (Debian) No
Issuer R13
AIA: http://r13.i.lencr.org/
Signature algorithm SHA256withRSA
Extended Validation No
Certificate Transparency Yes (certificate)
OCSP Must Staple No
Revocation information CRL
CRL: http://r13.c.lencr.org/102.crl
Revocation status Good (not revoked)
DNS CAA Yes
policy host: flatassembler.net
issuewild: letsencrypt.org flags:0
issuewild: certum.pl flags:0
issue: certum.pl flags:0
issue: letsencrypt.org flags:0
Trusted Yes
Mozilla  Apple  Android  Java  Windows 


Additional Certificates (if supplied)
Certificates provided 2 (2726 bytes)
Chain issues None
#2
Subject R13
Fingerprint SHA256: d3b128216a843f8ef1321501f5df52a5df52939ee2c19297712cd3de4d419354
Pin SHA256: AlSQhgtJirc8ahLyekmtX+Iw+v46yPYRLJt9Cq1GlB0=
Valid until Fri, 12 Mar 2027 23:59:59 UTC (expires in 1 year and 6 months)
Key RSA 2048 bits (e 65537)
Issuer ISRG Root X1
Signature algorithm SHA256withRSA


Certification Paths
Path #1: Trusted
1 Sent by server flatassembler.net
Fingerprint SHA256: 8b7f09e34ee6165c5bdc96a3d6f0ecc34f212d3d5ff497f7c39eafe806533c1a
Pin SHA256: HjtMmDWcZOB0EqGkxcr6piOakNkSER5TDPLmReKTHmM=
RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R13
Fingerprint SHA256: d3b128216a843f8ef1321501f5df52a5df52939ee2c19297712cd3de4d419354
Pin SHA256: AlSQhgtJirc8ahLyekmtX+Iw+v46yPYRLJt9Cq1GlB0=
RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1 Sent by server flatassembler.net
Fingerprint SHA256: 8b7f09e34ee6165c5bdc96a3d6f0ecc34f212d3d5ff497f7c39eafe806533c1a
Pin SHA256: HjtMmDWcZOB0EqGkxcr6piOakNkSER5TDPLmReKTHmM=
RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R13
Fingerprint SHA256: d3b128216a843f8ef1321501f5df52a5df52939ee2c19297712cd3de4d419354
Pin SHA256: AlSQhgtJirc8ahLyekmtX+Iw+v46yPYRLJt9Cq1GlB0=
RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1 Sent by server flatassembler.net
Fingerprint SHA256: 8b7f09e34ee6165c5bdc96a3d6f0ecc34f212d3d5ff497f7c39eafe806533c1a
Pin SHA256: HjtMmDWcZOB0EqGkxcr6piOakNkSER5TDPLmReKTHmM=
RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R13
Fingerprint SHA256: d3b128216a843f8ef1321501f5df52a5df52939ee2c19297712cd3de4d419354
Pin SHA256: AlSQhgtJirc8ahLyekmtX+Iw+v46yPYRLJt9Cq1GlB0=
RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1 Sent by server flatassembler.net
Fingerprint SHA256: 8b7f09e34ee6165c5bdc96a3d6f0ecc34f212d3d5ff497f7c39eafe806533c1a
Pin SHA256: HjtMmDWcZOB0EqGkxcr6piOakNkSER5TDPLmReKTHmM=
RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R13
Fingerprint SHA256: d3b128216a843f8ef1321501f5df52a5df52939ee2c19297712cd3de4d419354
Pin SHA256: AlSQhgtJirc8ahLyekmtX+Iw+v46yPYRLJt9Cq1GlB0=
RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA
Path #1: Trusted
1 Sent by server flatassembler.net
Fingerprint SHA256: 8b7f09e34ee6165c5bdc96a3d6f0ecc34f212d3d5ff497f7c39eafe806533c1a
Pin SHA256: HjtMmDWcZOB0EqGkxcr6piOakNkSER5TDPLmReKTHmM=
RSA 2048 bits (e 65537) / SHA256withRSA
2 Sent by server R13
Fingerprint SHA256: d3b128216a843f8ef1321501f5df52a5df52939ee2c19297712cd3de4d419354
Pin SHA256: AlSQhgtJirc8ahLyekmtX+Iw+v46yPYRLJt9Cq1GlB0=
RSA 2048 bits (e 65537) / SHA256withRSA
3 In trust store ISRG Root X1   Self-signed
Fingerprint SHA256: 96bcec06264976f37460779acf28c5a7cfe8a3c0aae11a8ffcee05c0bddf08c6
Pin SHA256: C5+lpZ7tcVwmwQIMcRtPbsQtWLABXhQzejna0wHFr8M=
RSA 4096 bits (e 65537) / SHA256withRSA

Click here to expand

Configuration
Protocols
TLS 1.3 No
TLS 1.2 Yes
TLS 1.1 Yes
TLS 1.0 Yes
SSL 3 No
SSL 2 No


Cipher Suites
# TLS 1.2 (suites in server-preferred order)
TLS_DHE_RSA_WITH_AES_256_CBC_SHA256 (0x6b)   DH 2048 bits   FS   WEAK 256
TLS_DHE_RSA_WITH_AES_128_CBC_SHA256 (0x67)   DH 2048 bits   FS   WEAK 128
TLS_DHE_RSA_WITH_AES_256_CBC_SHA (0x39)   DH 2048 bits   FS   WEAK 256
TLS_DHE_RSA_WITH_AES_128_CBC_SHA (0x33)   DH 2048 bits   FS   WEAK 128
TLS_RSA_WITH_AES_256_CBC_SHA256 (0x3d)   WEAK 256
TLS_RSA_WITH_AES_128_CBC_SHA256 (0x3c)   WEAK 128
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)   WEAK 256
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)   WEAK 128
# TLS 1.1 (suites in server-preferred order)
TLS_DHE_RSA_WITH_AES_256_CBC_SHA (0x39)   DH 2048 bits   FS   WEAK 256
TLS_DHE_RSA_WITH_AES_128_CBC_SHA (0x33)   DH 2048 bits   FS   WEAK 128
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)   WEAK 256
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)   WEAK 128
# TLS 1.0 (suites in server-preferred order)
TLS_DHE_RSA_WITH_AES_256_CBC_SHA (0x39)   DH 2048 bits   FS   WEAK 256
TLS_DHE_RSA_WITH_AES_128_CBC_SHA (0x33)   DH 2048 bits   FS   WEAK 128
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)   WEAK 256
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)   WEAK 128


Handshake Simulation
Android 2.3.7   No SNI 2 Server sent fatal alert: access_denied
Android 4.0.4 Server sent fatal alert: access_denied
Android 4.1.1 Server sent fatal alert: access_denied
Android 4.2.2 Server sent fatal alert: access_denied
Android 4.3 Server sent fatal alert: access_denied
Android 4.4.2 Server sent fatal alert: access_denied
Android 5.0.0 Server sent fatal alert: access_denied
Android 6.0 Server sent fatal alert: access_denied
Android 7.0 Server sent fatal alert: access_denied
Android 8.0 Server sent fatal alert: access_denied
Android 8.1 Server sent fatal alert: access_denied
Android 9.0 Server sent fatal alert: access_denied
Baidu Jan 2015 Server sent fatal alert: access_denied
BingPreview Jan 2015 Server sent fatal alert: access_denied
Chrome 49 / XP SP3 Server sent fatal alert: access_denied
Chrome 69 / Win 7  R Server sent fatal alert: access_denied
Chrome 70 / Win 10 Server sent fatal alert: access_denied
Chrome 80 / Win 10  R Server sent fatal alert: access_denied
Firefox 31.3.0 ESR / Win 7 Server sent fatal alert: access_denied
Firefox 47 / Win 7  R Server sent fatal alert: access_denied
Firefox 49 / XP SP3 Server sent fatal alert: access_denied
Firefox 62 / Win 7  R Server sent fatal alert: access_denied
Firefox 73 / Win 10  R Server sent fatal alert: access_denied
Googlebot Feb 2018 Server sent fatal alert: access_denied
IE 7 / Vista Server sent fatal alert: access_denied
IE 8 / XP   No FS 1   No SNI 2 Server sent fatal alert: access_denied
IE 8-10 / Win 7  R Server sent fatal alert: access_denied
IE 11 / Win 7  R Server sent fatal alert: access_denied
IE 11 / Win 8.1  R Server sent fatal alert: access_denied
IE 10 / Win Phone 8.0 Server sent fatal alert: access_denied
IE 11 / Win Phone 8.1  R Server sent fatal alert: access_denied
IE 11 / Win Phone 8.1 Update  R Server sent fatal alert: access_denied
IE 11 / Win 10  R Server sent fatal alert: access_denied
Edge 15 / Win 10  R Server sent fatal alert: access_denied
Edge 16 / Win 10  R Server sent fatal alert: access_denied
Edge 18 / Win 10  R Server sent fatal alert: access_denied
Edge 13 / Win Phone 10  R Server sent fatal alert: access_denied
Java 6u45   No SNI 2 Server sent fatal alert: access_denied
Java 7u25 Server sent fatal alert: access_denied
Java 8u161 Server sent fatal alert: access_denied
Java 11.0.3 Server sent fatal alert: access_denied
Java 12.0.1 Server sent fatal alert: access_denied
OpenSSL 0.9.8y Server sent fatal alert: access_denied
OpenSSL 1.0.1l  R Server sent fatal alert: access_denied
OpenSSL 1.0.2s  R Server sent fatal alert: access_denied
OpenSSL 1.1.0k  R Server sent fatal alert: access_denied
OpenSSL 1.1.1c  R Server sent fatal alert: access_denied
Safari 5.1.9 / OS X 10.6.8 Server sent fatal alert: access_denied
Safari 6 / iOS 6.0.1 Server sent fatal alert: access_denied
Safari 6.0.4 / OS X 10.8.4  R Server sent fatal alert: access_denied
Safari 7 / iOS 7.1  R Server sent fatal alert: access_denied
Safari 7 / OS X 10.9  R Server sent fatal alert: access_denied
Safari 8 / iOS 8.4  R Server sent fatal alert: access_denied
Safari 8 / OS X 10.10  R Server sent fatal alert: access_denied
Safari 9 / iOS 9  R Server sent fatal alert: access_denied
Safari 9 / OS X 10.11  R Server sent fatal alert: access_denied
Safari 10 / iOS 10  R Server sent fatal alert: access_denied
Safari 10 / OS X 10.12  R Server sent fatal alert: access_denied
Safari 12.1.2 / MacOS 10.14.6 Beta  R Server sent fatal alert: access_denied
Safari 12.1.1 / iOS 12.3.1  R Server sent fatal alert: access_denied
Apple ATS 9 / iOS 9  R Server sent fatal alert: access_denied
Yahoo Slurp Jan 2015 Server sent fatal alert: access_denied
YandexBot Jan 2015 Server sent fatal alert: access_denied
# Not simulated clients (Protocol mismatch)
IE 6 / XP   No FS 1   No SNI 2 Protocol mismatch (not simulated)

Click here to expand

(1) Clients that do not support Forward Secrecy (FS) are excluded when determining support for it.
(2) No support for virtual SSL hosting (SNI). Connects to the default site if the server uses SNI.
(3) Only first connection attempt simulated. Browsers sometimes retry with a lower protocol version.
(R) Denotes a reference browser or client, with which we expect better effective security.
(All) We use defaults, but some platforms do not use their best protocols and features (e.g., Java 6 & 7, older IE).
(All) Certificate trust is not checked in handshake simulation, we only perform TLS handshake.


Protocol Details
Secure Renegotiation Supported
Secure Client-Initiated Renegotiation No
Insecure Client-Initiated Renegotiation No
BEAST attack Not mitigated server-side (more info)   TLS 1.0: 0x39
POODLE (SSLv3) No, SSL 3 not supported (more info)
POODLE (TLS) No (more info)
Zombie POODLE Unknown (more info)
GOLDENDOODLE Unknown (more info)
OpenSSL 0-Length Unknown (more info)
Sleeping POODLE Unknown (more info)
Downgrade attack prevention No, TLS_FALLBACK_SCSV not supported (more info)
SSL/TLS compression No
RC4 No
Heartbeat (extension) No
Heartbleed (vulnerability) No (more info)
Ticketbleed (vulnerability) No (more info)
OpenSSL CCS vuln. (CVE-2014-0224) No (more info)
OpenSSL Padding Oracle vuln.
(CVE-2016-2107)		 No (more info)
ROBOT (vulnerability) No (more info)
Forward Secrecy With some browsers (more info)
ALPN No
NPN No
Session resumption (caching) Yes
Session resumption (tickets) No
OCSP stapling No
Strict Transport Security (HSTS) Yes
max-age=31536000; includeSubDomains
HSTS Preloading Not in: Chrome  Edge  Firefox  IE 
Public Key Pinning (HPKP) No (more info)
Public Key Pinning Report-Only No
Public Key Pinning (Static) No (more info)
Long handshake intolerance No
TLS extension intolerance No
TLS version intolerance TLS 2.152 
Incorrect SNI alerts No
Uses common DH primes No
DH public server param (Ys) reuse No
ECDH public server param reuse No, ECDHE suites not supported
Supported Named Groups -
SSL 2 handshake compatibility No


HTTP Requests
1 https://flatassembler.net/  (HTTP/1.1 200 She'll be apples)
1
X-Powered-By PHP/7.4.33
Content-Type text/html;charset=UTF-8
Connection keep-alive
Server HeavyThing
Date Fri, 12 Sep 2025 20:23:29 GMT
Strict-Transport-Security max-age=31536000; includeSubDomains
Content-Length 3387


Miscellaneous
Test date Fri, 12 Sep 2025 20:23:20 UTC
Test duration 90.890 seconds
HTTP status code 200
HTTP server signature HeavyThing
Server hostname s3.marrison.com


SSL Report v2.4.1