utilities/feroxbuster
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added FAQ section to README

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epi 2020-10-24 09:26:54 -05:00
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README.md
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@ -485,8 +485,12 @@ There are a few potential causes of this error. The simplest is that your opera
There are quite a few options to solve this particular problem, of which a handful are shown below.
#### Increase the Number of Open Files
We'll start by increasing the number of open files the OS allows. On my Kali install, the default was `1024`, and I know some MacOS installs use `256` 😕.
##### Edit `/etc/security/limits.conf`
One option to up the limit is to edit `/etc/security/limits.conf` so that it includes the two lines below.
- `*` represents all users
@ -502,19 +506,23 @@ One option to up the limit is to edit `/etc/security/limits.conf` so that it inc
...
```
##### Use `ulimit` directly
A faster option, that is **not** persistent, is to simply use the `ulimit` command to change the setting.
```
ulimit -n 4096
```
#### Additional Tweaks (may not be needed)
If you still find yourself hitting the file limit with the above changes, there are a few additional tweaks that may help.
> This section was shamelessly stolen from this [stackoverflow answer](https://stackoverflow.com/a/3923785). More information is included in that post and is recommended reading if you end up needing to use this section.
✨ Special thanks to HTB user [@sparkla](https://www.hackthebox.eu/home/users/profile/221599) for their help with identifying these additional tweaks ✨
1. Increase the ephemeral port range, and decrease the tcp_fin_timeout.
> This section was shamelessly stolen from this [stackoverflow answer](https://stackoverflow.com/a/3923785). More information is included in that post and is recommended reading if you end up needing to use this section.
##### Increase the ephemeral port range, and decrease the tcp_fin_timeout.
The ephermal port range defines the maximum number of outbound sockets a host can create from a particular I.P. address. The fin_timeout defines the minimum time these sockets will stay in TIME_WAIT state (unusable after being used once). Usual system defaults are
@ -528,7 +536,7 @@ sudo sysctl net.ipv4.ip_local_port_range="15000 61000"
sudo sysctl net.ipv4.tcp_fin_timeout=30
```
2. Allow socket reuse while in a `TIME_WAIT` status
##### Allow socket reuse while in a `TIME_WAIT` status
This allows fast cycling of sockets in time_wait state and re-using them. Make sure to read post [Coping with the TCP TIME-WAIT](https://vincent.bernat.ch/en/blog/2014-tcp-time-wait-state-linux) from Vincent Bernat to understand the implications.