Gecko [ nrupathungauniversityblr.ac.in ]

Name	Size	Permission
aa-exec	22.16 KB	-rwxr-xr-x
aa-remove-unknown	2.86 KB	-rwxr-xr-x
aa-status	7.11 KB	-rwxr-xr-x
add-shell	695 B	-rwxr-xr-x
addgroup	36.4 KB	-rwxr-xr-x
adduser	36.4 KB	-rwxr-xr-x
apparmor_status	7.11 KB	-rwxr-xr-x
arp	54.09 KB	-rwxr-xr-x
arpd	46.74 KB	-rwxr-xr-x
chat	26.01 KB	-rwxr-xr-x
chgpasswd	53.33 KB	-rwxr-xr-x
chpasswd	49.43 KB	-rwxr-xr-x
chroot	38.8 KB	-rwxr-xr-x
cpgr	51.48 KB	-rwxr-xr-x
cppw	51.48 KB	-rwxr-xr-x
cron	43.43 KB	-rwxr-xr-x
delgroup	16.13 KB	-rwxr-xr-x
deluser	16.13 KB	-rwxr-xr-x
dnsmasq	379.6 KB	-rwxr-xr-x
dpkg-preconfigure	3.52 KB	-rwxr-xr-x
dpkg-reconfigure	4.23 KB	-rwxr-xr-x
e2freefrag	10.24 KB	-rwxr-xr-x
e4defrag	26.53 KB	-rwxr-xr-x
faillock	14.4 KB	-rwxr-xr-x
fanatic	35.21 KB	-rwxr-xr-x
fanctl	41.97 KB	-rwxr-xr-x
fdformat	22.57 KB	-rwxr-xr-x
filefrag	14.31 KB	-rwxr-xr-x
genl	46.69 KB	-rwxr-xr-x
groupadd	57.42 KB	-rwxr-xr-x
groupdel	65.83 KB	-rwxr-xr-x
groupmod	67.7 KB	-rwxr-xr-x
grpck	53.31 KB	-rwxr-xr-x
grpconv	49.19 KB	-rwxr-xr-x
grpunconv	49.2 KB	-rwxr-xr-x
iconvconfig	26.66 KB	-rwxr-xr-x
invoke-rc.d	19.41 KB	-rwxr-xr-x
ip6tables-apply	6.85 KB	-rwxr-xr-x
iptables-apply	6.85 KB	-rwxr-xr-x
ldattach	26.63 KB	-rwxr-xr-x
logrotate	63.11 KB	-rwxr-xr-x
mkinitramfs	10.24 KB	-rwxr-xr-x
mklost+found	10.25 KB	-rwxr-xr-x
netplan	17.94 KB	-rwxr-xr-x
newusers	73.84 KB	-rwxr-xr-x
nfnl_osf	14.37 KB	-rwxr-xr-x
nologin	5.95 KB	-rwxr-xr-x
pam-auth-update	19.09 KB	-rwxr-xr-x
pam_getenv	2.82 KB	-rwxr-xr-x
pam_timestamp_check	10.38 KB	-rwxr-xr-x
pppd	385.73 KB	-rwsr-xr--
pppdump	18.1 KB	-rwxr-xr-x
pppoe-discovery	18 KB	-rwxr-xr-x
pppstats	13.99 KB	-rwxr-xr-x
pwck	45.36 KB	-rwxr-xr-x
pwconv	41.27 KB	-rwxr-xr-x
pwunconv	36.43 KB	-rwxr-xr-x
readprofile	14.52 KB	-rwxr-xr-x
remove-shell	749 B	-rwxr-xr-x
rfkill	10.29 KB	-rwxr-xr-x
rmt	54.95 KB	-rwxr-xr-x
rmt-tar	54.95 KB	-rwxr-xr-x
rsyslogd	585.28 KB	-rwxr-xr-x
rtcwake	38.8 KB	-rwxr-xr-x
service	9.82 KB	-rwxr-xr-x
setvesablank	10.27 KB	-rwxr-xr-x
sshd	772.48 KB	-rwxr-xr-x
tarcat	936 B	-rwxr-xr-x
tunelp	22.53 KB	-rwxr-xr-x
tzconfig	106 B	-rwxr-xr-x
update-alternatives	46.61 KB	-rwxr-xr-x
update-ca-certificates	5.25 KB	-rwxr-xr-x
update-initramfs	8.38 KB	-rwxr-xr-x
update-mime	8.84 KB	-rwxr-xr-x
update-passwd	30.41 KB	-rwxr-xr-x
update-rc.d	14.1 KB	-rwxr-xr-x
useradd	118.72 KB	-rwxr-xr-x
userdel	81.92 KB	-rwxr-xr-x
usermod	118.5 KB	-rwxr-xr-x
vcstime	6.26 KB	-rwxr-xr-x
vigr	55.7 KB	-rwxr-xr-x
vipw	55.7 KB	-rwxr-xr-x
visudo	187.89 KB	-rwxr-xr-x
zic	50.54 KB	-rwxr-xr-x

Code Editor : iptables-apply

#!/bin/bash
# iptables-apply -- a safer way to update iptables remotely
#
# Usage:
#   iptables-apply [-hV] [-t timeout] [-w savefile] {[rulesfile]|-c [runcmd]}
#
# Versions:
#   * 1.0 Copyright 2006 Martin F. Krafft <madduck@madduck.net>
#         Original version
#   * 1.1 Copyright 2010 GW <gw.2010@tnode.com or http://gw.tnode.com/>
#         Added parameter -c (run command)
#         Added parameter -w (save successfully applied rules to file)
#         Major code cleanup
#
# Released under the terms of the Artistic Licence 2.0
#
set -eu

PROGNAME="${0##*/}"
VERSION=1.1

### Default settings

DEF_TIMEOUT=10

MODE=0  # apply rulesfile mode
# MODE=1  # run command mode

case "$PROGNAME" in
	(*6*)
		SAVE=ip6tables-save
		RESTORE=ip6tables-restore
		DEF_RULESFILE="/etc/network/ip6tables.up.rules"
		DEF_SAVEFILE="$DEF_RULESFILE"
		DEF_RUNCMD="/etc/network/ip6tables.up.run"
		;;
	(*)
		SAVE=iptables-save
		RESTORE=iptables-restore
		DEF_RULESFILE="/etc/network/iptables.up.rules"
		DEF_SAVEFILE="$DEF_RULESFILE"
		DEF_RUNCMD="/etc/network/iptables.up.run"
		;;
esac

### Functions

function blurb() {
	cat <<-__EOF__
	$PROGNAME $VERSION -- a safer way to update iptables remotely
	__EOF__
}

function copyright() {
	cat <<-__EOF__
	$PROGNAME has been published under the terms of the Artistic Licence 2.0.

Original version - Copyright 2006 Martin F. Krafft <madduck@madduck.net>.
	Version 1.1 - Copyright 2010 GW <gw.2010@tnode.com or http://gw.tnode.com/>.
	__EOF__
}

function about() {
	blurb
	echo
	copyright
}

function usage() {
	blurb
	echo
	cat <<-__EOF__
	Usage:
	  $PROGNAME [-hV] [-t timeout] [-w savefile] {[rulesfile]|-c [runcmd]}

The script will try to apply a new rulesfile (as output by iptables-save,
	read by iptables-restore) or run a command to configure iptables and then
	prompt the user whether the changes are okay. If the new iptables rules cut
	the existing connection, the user will not be able to answer affirmatively.
	In this case, the script rolls back to the previous working iptables rules
	after the timeout expires.

Successfully applied rules can also be written to savefile and later used
	to roll back to this state. This can be used to implement a store last good
	configuration mechanism when experimenting with an iptables setup script:
	  $PROGNAME -w $DEF_SAVEFILE -c $DEF_RUNCMD

When called as ip6tables-apply, the script will use ip6tables-save/-restore
	and IPv6 default values instead. Default value for rulesfile is
	'$DEF_RULESFILE'.

Options:

-t seconds, --timeout seconds
	  Specify the timeout in seconds (default: $DEF_TIMEOUT).
	-w savefile, --write savefile
	  Specify the savefile where successfully applied rules will be written to
	  (default if empty string is given: $DEF_SAVEFILE).
	-c runcmd, --command runcmd
	  Run command runcmd to configure iptables instead of applying a rulesfile
	  (default: $DEF_RUNCMD).
	-h, --help
	  Display this help text.
	-V, --version
	  Display version information.

__EOF__
}

function checkcommands() {
	for cmd in "${COMMANDS[@]}"; do
		if ! command -v "$cmd" >/dev/null; then
			echo "Error: needed command not found: $cmd" >&2
			exit 127
		fi
	done
}

function revertrules() {
	echo -n "Reverting to old iptables rules... "
	"$RESTORE" <"$TMPFILE"
	echo "done."
}

### Parsing and checking parameters

TIMEOUT="$DEF_TIMEOUT"
SAVEFILE=""

SHORTOPTS="t:w:chV";
LONGOPTS="timeout:,write:,command,help,version";

OPTS=$(getopt -s bash -o "$SHORTOPTS" -l "$LONGOPTS" -n "$PROGNAME" -- "$@") || exit $?
for opt in $OPTS; do
	case "$opt" in
		(-*)
			unset OPT_STATE
			;;
		(*)
			case "${OPT_STATE:-}" in
				(SET_TIMEOUT) eval TIMEOUT=$opt;;
				(SET_SAVEFILE)
					eval SAVEFILE=$opt
					[ -z "$SAVEFILE" ] && SAVEFILE="$DEF_SAVEFILE"
					;;
			esac
			;;
	esac

# Validate parameters
if [ "$TIMEOUT" -ge 0 ] 2>/dev/null; then
	TIMEOUT=$(($TIMEOUT))
else
	echo "Error: timeout must be a positive number" >&2
	exit 1
fi

if [ -n "$SAVEFILE" -a -e "$SAVEFILE" -a ! -w "$SAVEFILE" ]; then
	echo "Error: savefile not writable: $SAVEFILE" >&2
	exit 8
fi

case "$MODE" in
	(1)
		# Treat parameter as runcmd (run command mode)
		RUNCMD="${1:-$DEF_RUNCMD}"
		if [ ! -x "$RUNCMD" ]; then
			echo "Error: runcmd not executable: $RUNCMD" >&2
			exit 6
		fi

# Needed commands
		COMMANDS=(mktemp "$SAVE" "$RESTORE" "$RUNCMD")
		checkcommands
		;;
	(*)
		# Treat parameter as rulesfile (apply rulesfile mode)
		RULESFILE="${1:-$DEF_RULESFILE}";
		if [ ! -r "$RULESFILE" ]; then
			echo "Error: rulesfile not readable: $RULESFILE" >&2
			exit 2
		fi

# Needed commands
		COMMANDS=(mktemp "$SAVE" "$RESTORE")
		checkcommands
		;;
esac

### Begin work

# Store old iptables rules to temporary file
TMPFILE=`mktemp /tmp/$PROGNAME-XXXXXXXX`
trap "rm -f $TMPFILE" EXIT 1 2 3 4 5 6 7 8 10 11 12 13 14 15

if ! "$SAVE" >"$TMPFILE"; then
	# An error occured
	if ! grep -q ipt /proc/modules 2>/dev/null; then
		echo "Error: iptables support lacking from the kernel" >&2
		exit 3
	else
		echo "Error: unknown error saving old iptables rules: $TMPFILE" >&2
		exit 4
	fi
fi

# Legacy to stop the fail2ban daemon if present
[ -x /etc/init.d/fail2ban ] && /etc/init.d/fail2ban stop

# Configure iptables
case "$MODE" in
	(1)
		# Run command in background and kill it if it times out
		echo -n "Running command '$RUNCMD'... "
		"$RUNCMD" &
		CMD_PID=$!
		( sleep "$TIMEOUT"; kill "$CMD_PID" 2>/dev/null; exit 0 ) &
		CMDTIMEOUT_PID=$!
		if ! wait "$CMD_PID"; then
			echo "failed."
			echo "Error: unknown error running command: $RUNCMD" >&2
			revertrules
			exit 7
		else
			echo "done."
		fi
		;;
	(*)
		# Apply iptables rulesfile
		echo -n "Applying new iptables rules from '$RULESFILE'... "
		if ! "$RESTORE" <"$RULESFILE"; then
			echo "failed."
			echo "Error: unknown error applying new iptables rules: $RULESFILE" >&2
			revertrules
			exit 5
		else
			echo "done."
		fi
		;;
esac

# Prompt user for confirmation
echo -n "Can you establish NEW connections to the machine? (y/N) "

read -n1 -t "$TIMEOUT" ret 2>&1 || :
case "${ret:-}" in
	(y*|Y*)
		# Success
		echo

if [ ! -z "$SAVEFILE" ]; then
			# Write successfully applied rules to the savefile
			echo "Writing successfully applied rules to '$SAVEFILE'..."
			if ! "$SAVE" >"$SAVEFILE"; then
				echo "Error: unknown error writing successfully applied rules: $SAVEFILE" >&2
				exit 9
			fi
		fi

echo "... then my job is done. See you next time."
		;;
	(*)
		# Failed
		echo
		if [ -z "${ret:-}" ]; then
			echo "Timeout! Something happened (or did not). Better play it safe..."
		else
			echo "No affirmative response! Better play it safe..."
		fi
		revertrules
		exit 255
		;;
esac

# Legacy to start the fail2ban daemon again
[ -x /etc/init.d/fail2ban ] && /etc/init.d/fail2ban start

exit 0

# vim:noet:sw=8

${this.title}

Code Editor : iptables-apply