Remove a host that denyhosts has banned

Denyhosts is a utility that automatically bans IPs who attempt to ssh in to your server and get three wrong passwords.

This is great when people are dictionary-attacking your SSH server, but less good when you have actual users who might get their password wrong.

``` #/bin/sh REMOVE=$1 /etc/init.d/denyhosts stop cd /var/lib/denyhosts for THISFILE in hosts hosts-restricted hosts-root hosts-valid users-hosts; do mv $THISFILE /tmp/; cat /tmp/$THISFILE | grep -v $REMOVE > $THISFILE; rm /tmp/$THISFILE; done;

mv /etc/hosts.deny /tmp/ cat /tmp/hosts.deny | grep -v $REMOVE > /etc/hosts.deny; rm /tmp/hosts.deny

/etc/init.d/denyhosts start Needs to run as <em class=“u”> root </em> or someone with access to <em class=“u”> all </em> denyhost’s files (plus hosts.deny). OR #/bin/sh REMOVE=$1 /usr/share/denyhosts/daemon-control stop cd /usr/share/denyhosts/data for THISFILE in hosts hosts-restricted hosts-root hosts-valid users-hosts; do mv $THISFILE /tmp; cat /tmp/$THISFILE | grep -v $REMOVE > $THISFILE; rm /tmp/$THISFILE; done; mv /etc/hosts.deny /tmp/ cat /tmp/hosts.deny | grep -v $REMOVE > /etc/hosts.deny; rm /tmp/hosts.deny

```

/usr/share/denyhosts/daemon-control start

Links: http://www.aquarionics.com/2009/05/13/to-remove-a-host-that-denyhosts-has-banned