# Service Interaction

{% tabs %}
{% tab title="Netcat Banner Grab" %}

```shell-session
nc -nv 10.129.14.136 21
```

{% endtab %}

{% tab title="Telnet Banner Grab" %}

```
telnet 10.129.14.136 21
```

{% endtab %}

{% tab title="SSL FTP Server Interaction with OpenSSL" %}

{% code overflow="wrap" %}

```bash
openssl s_client -connect 10.129.14.136:21 -starttls ftp

CONNECTED(00000003)                                                                                      
Can't use SSL_get_servername                        
depth=0 C = US, ST = California, L = Sacramento, O = Inlanefreight, OU = Dev, CN = master.inlanefreight.htb, emailAddress = admin@inlanefreight.htb
verify error:num=18:self signed certificate
verify return:1

depth=0 C = US, ST = California, L = Sacramento, O = Inlanefreight, OU = Dev, CN = master.inlanefreight.htb, emailAddress = admin@inlanefreight.htb
verify return:1
---                                                 
Certificate chain
 0 s:C = US, ST = California, L = Sacramento, O = Inlanefreight, OU = Dev, CN = master.inlanefreight.htb, emailAddress = admin@inlanefreight.htb
 
 i:C = US, ST = California, L = Sacramento, O = Inlanefreight, OU = Dev, CN = master.inlanefreight.htb, emailAddress = admin@inlanefreight.htb
---
 
Server certificate

-----BEGIN CERTIFICATE-----

MIIENTCCAx2gAwIBAgIUD+SlFZAWzX5yLs2q3ZcfdsRQqMYwDQYJKoZIhvcNAQEL
...SNIP...
```

{% endcode %}
{% endtab %}
{% endtabs %}