# Ident - Port 113

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## Basic Information <a href="#basic-information" id="basic-information"></a>

The **Ident Protocol** is used over the **Internet** to associate a **TCP connection** with a specific user. Originally designed to aid in **network management** and **security**, it operates by allowing a server to query a client on port 113 to request information about the user of a particular TCP connection.

However, due to modern privacy concerns and the potential for misuse, its usage has decreased as it can inadvertently reveal user information to unauthorized parties. Enhanced security measures, such as encrypted connections and strict access controls, are recommended to mitigate these risks.

**Default port:** 113

```
PORT    STATE SERVICE
113/tcp open  ident
```

## **Enumeration**

```bash
nmap -p 113 <target-ip>
```

**Querying the Service** To test the Ident service manually:

```bash
nc <target-ip> 113
<local-port> , <remote-port>
```

This will return a response containing the username associated with the TCP connection.

**Enumerating Usernames**

```bash
use auxiliary/scanner/ident/ident
set RHOSTS <target-ip>
run
```

[**Ident-user-enum:**](https://github.com/CERTTools/ident-user-enum.git)

```
./ident-user-enum.pl -f targets.txt
```

When run, the tool might produce output like this:

```plaintext
192.168.1.10:113 -> User: admin
192.168.1.10:113 -> User: www-data
192.168.1.10:113 -> User: root
```

## Files <a href="#files" id="files"></a>

### **Default Location of `identd.conf`**

The `identd.conf` file is typically found in the following locations, depending on the system and Ident implementation:

* `/etc/identd.conf`
* `/usr/local/etc/identd.conf`
* `/etc/oidentd.conf` (for oidentd)

If you can’t locate the file, use a search command:

```bash
sudo find / -name "identd.conf"
```

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