> ## Documentation Index
> Fetch the complete documentation index at: https://help.decodo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Authentication Guides

> Decodo Proxy Authentication Method Guide Overview

<Tip>
  We support proxy authentication through username and password or IP-based whitelisting.
</Tip>

<Columns cols={2}>
  <Card title="Residential Proxies" icon="link" horizontal href="https://help.decodo.com/docs/residential-proxy-authentication-methods">
    Authentication Methods
  </Card>

  <Card title="Datacenter Pay/IP Proxies" icon="link" horizontal href="https://help.decodo.com/docs/datacenter-pay-per-ip-proxy-authentication-methods">
    Authentication Methods
  </Card>
</Columns>

<Columns cols={2}>
  <Card title="Mobile Proxies" icon="link" horizontal href="https://help.decodo.com/docs/mobile-proxy-authentication-methods">
    Authentication Methods
  </Card>

  <Card title="ISP Pay/IP Proxies" icon="link" horizontal href="https://help.decodo.com/docs/isp-pay-per-ip-proxy-authentication-methods">
    Authentication Methods
  </Card>
</Columns>

<Columns cols={2}>
  <Card title="Datacenter Pay/PG Proxies" icon="link" horizontal href="https://help.decodo.com/docs/datacenter-pay-per-gb-proxy-authentication-methods">
    Authentication Methods
  </Card>

  <Card title="Dedicated ISP Proxies" icon="link" horizontal href="https://help.decodo.com/docs/dedicated-isp-proxy-authentication-methods">
    Authentication Methods
  </Card>
</Columns>

<Columns cols={2}>
  <Card title="ISP Pay/GB Proxies" icon="link" horizontal href="https://help.decodo.com/docs/isp-pay-per-gb-proxy-authentication-methods">
    Authentication Methods
  </Card>

  <Card title="Dedicated DC Proxies" icon="link" horizontal href="https://help.decodo.com/docs/dedicated-datacenter-proxy-authentication-methods">
    Authentication Methods
  </Card>
</Columns>

***

<Columns cols={2}>
  <Card title="Support" href="https://direct.lc.chat/12092754" cta="Let's chat!">
    Need help or just want to say hello? Our support is available 24/7. \
    You can also reach us anytime via email at [support@decodo.com](mailto:support@decodo.com).
  </Card>

  <Card title="Feedback" href="mailto:feedback@decodo.com" cta="Share feedback">
    Can't find what you're looking for? Request an article! \
    Have feedback? Share your thoughts on how we can improve.
  </Card>
</Columns>