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feat: add notes for openssl s_client

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arne 2025-02-16 13:41:39 +01:00
parent 1daebc49a7
commit 6353c8a8c9
1 changed files with 24 additions and 0 deletions
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content/nerdstuff/certificates.md Normal file
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---
title: Certificates
menu:
main:
parent: Nerdstuff
---
## Retrieve certificate information from server
### HTTPS
```
openssl s_client -connect mail.br0tkasten.de:443 -servername mail.br0tkasten.de </dev/null 2>/dev/null | openssl x509 -noout -text
```
### IMAP with STARTTLS
```
openssl s_client -starttls imap -connect mail.br0tkasten.de:143 </dev/null 2>/dev/null | openssl x509 -noout -text
```
### SMTP with STARTTLS
```
openssl s_client -starttls smtp -connect mail.br0tkasten.de:587 </dev/null 2>/dev/null | openssl x509 -noout -text
```