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#
# firewall_text.py: text mode firewall setup
#
# Bill Nottingham <notting@redhat.com>
#
# Copyright 2001 Red Hat, Inc.
#
# This software may be freely redistributed under the terms of the GNU
# library public license.
#
# You should have received a copy of the GNU Library Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
from snack import *
from constants_text import *
from translate import _
class FirewallWindow:
def __call__(self, screen, network, firewall):
bb = ButtonBar (screen, (TEXT_OK_BUTTON, (_("Customize"), "customize"), TEXT_BACK_BUTTON))
toplevel = GridFormHelp (screen, _("Firewall Configuration"),
"securitylevel", 1, 5)
text = _("A firewall protects against unauthorized "
"network intrusions. High security blocks all "
"incoming accesses. Medium blocks access "
"to system services (such as telnet or printing), "
"but allows other connections. No firewall allows "
"all connections and is not recommended. ")
toplevel.add (TextboxReflowed(50, text), 0, 0, (0, 0, 0, 1))
toplevel.add (bb, 0, 4, (0, 0, 0, 0), growx = 1)
smallGrid = Grid(2,1)
bigGrid = Grid(2,15)
typeGrid = Grid(3,2)
label = Label(_("Security Level:"))
smallGrid.setField (label, 0, 0, (0, 0, 0, 1), anchorLeft = 1)
self.paranoid = SingleRadioButton(_("High"), None, firewall.enabled and not firewall.policy)
self.paranoid.setCallback(self.radiocb, (firewall, self.paranoid))
typeGrid.setField (self.paranoid, 0, 0, (0, 0, 1, 0), anchorLeft = 1)
self.simple = SingleRadioButton(_("Medium"), self.paranoid, firewall.enabled and firewall.policy)
self.simple.setCallback(self.radiocb, (firewall, self.simple))
typeGrid.setField (self.simple, 1, 0, (0, 0, 1, 0), anchorLeft = 1)
self.disabled = SingleRadioButton(_("No firewall"), self.simple, not firewall.enabled)
self.disabled.setCallback(self.radiocb, (firewall, self.disabled))
typeGrid.setField (self.disabled, 2, 0, (0, 0, 1, 0), anchorLeft = 1)
smallGrid.setField (typeGrid, 1, 0, (1, 0, 0, 1), anchorLeft = 1)
currentRow = 1
devices = network.available().keys()
self.netCBs = {}
if (devices):
devices.sort()
cols = len(devices)
if cols > 4:
rows = cols % 4
cols = 4
else:
rows = 1
self.devGrid = Grid(cols, rows)
if devices != []:
bigGrid.setField (Label(_("Trusted Devices:")), 0, currentRow, (0, 0, 0, 1),
anchorLeft = 1)
curcol = 0
currow = 0
for dev in devices:
if network.netdevices[dev].get('bootproto') == 'dhcp':
firewall.dhcp = 1
cb = Checkbox (dev, dev in firewall.trustdevs)
self.devGrid.setField(cb, curcol, currow, (0, 0, 1, 0), anchorLeft = 1)
self.netCBs[dev] = cb
curcol = curcol + 1
if curcol >= cols:
currow = currow + 1
curcol = 1
bigGrid.setField (self.devGrid, 1, currentRow, (1, 0, 0, 1), anchorLeft = 1)
currentRow = currentRow + 1
bigGrid.setField (Label(_("Allow incoming:")), 0, currentRow, (0, 0, 0, 0),
anchorTop = 1)
self.portGrid = Grid(3,2)
self.dhcp = Checkbox (_("DHCP"), firewall.dhcp)
self.portGrid.setField (self.dhcp, 0, 0, (0, 0, 1, 0), anchorLeft = 1)
self.ssh = Checkbox (_("SSH"), firewall.ssh)
self.portGrid.setField (self.ssh, 1, 0, (0, 0, 1, 0), anchorLeft = 1)
self.telnet = Checkbox (_("Telnet"), firewall.telnet)
self.portGrid.setField (self.telnet, 2, 0, (0, 0, 1, 0), anchorLeft = 1)
self.http = Checkbox (_("WWW (HTTP)"), firewall.http)
self.portGrid.setField (self.http, 0, 1, (0, 0, 1, 0), anchorLeft = 1)
self.smtp = Checkbox (_("Mail (SMTP)"), firewall.smtp)
self.portGrid.setField (self.smtp, 1, 1, (0, 0, 1, 0), anchorLeft = 1)
self.ftp = Checkbox (_("FTP"), firewall.ftp)
self.portGrid.setField (self.ftp, 2, 1, (0, 0, 1, 0), anchorLeft = 1)
oGrid = Grid(2,1)
oGrid.setField (Label(_("Other ports")), 0, 0, (0, 0, 1, 0), anchorLeft = 1)
self.other = Entry (25, firewall.portlist)
oGrid.setField (self.other, 1, 0, (0, 0, 1, 0), anchorLeft = 1, growx = 1)
bigGrid.setField (self.portGrid, 1, currentRow, (1, 0, 0, 0), anchorLeft = 1)
bigGrid.setField (Label(""), 0, currentRow + 1, (0, 0, 0, 1), anchorLeft = 1)
bigGrid.setField (oGrid, 1, currentRow + 1, (1, 0, 0, 1), anchorLeft = 1)
self.portboxes = ( self.ssh, self.telnet, self.http, self.smtp, self.ftp,
self.other )
toplevel.add(smallGrid, 0, 1, (0, 0, 0, 0), anchorLeft = 1)
if self.disabled.selected():
self.radiocb((firewall, self.disabled))
while 1:
result = toplevel.run ()
rc = bb.buttonPressed (result)
if rc == TEXT_BACK_CHECK:
screen.popWindow()
return INSTALL_BACK
if rc == "customize":
if self.disabled.selected():
ButtonChoiceWindow(screen, _("Invalid Choice"),
_("You cannot customize a disabled firewall."),
buttons = [ TEXT_OK_STR ], width = 40)
else:
popbb = ButtonBar (screen, (TEXT_OK_BUTTON,))
poplevel = GridFormHelp (screen, _("Firewall Configuration - Customize"),
"securitycustom", 1, 5)
text = _("You can customize your firewall in two ways. "
"First, you can select to allow all traffic from "
"certain network interfaces. Second, you can allow "
"certain protocols explicitly through the firewall. "
"In a comma separated list, specify additional ports in the form "
"'service:protocol' such as 'imap:tcp'. ")
poplevel.add (TextboxReflowed(65, text), 0, 0, (0, 0, 0, 1))
poplevel.add (popbb, 0, 4, (0, 0, 0, 0), growx = 1)
poplevel.add (bigGrid, 0, 1, (0, 0, 0, 0), anchorLeft = 1)
result2 = poplevel.run()
# screen.popWindow()
rc2 = popbb.buttonPressed(result2)
# rc2 = ""
if rc2 == TEXT_OK_CHECK or result2 == TEXT_F12_CHECK:
#- Do some sanity checking on port list
portstring = string.strip(self.other.value())
portlist = ""
bad_token_found = 0
bad_token = ""
if portstring != "":
tokens = string.split(portstring, ',')
for token in tokens:
try:
if string.index(token,':'): #- if there's a colon in the token, it's valid
parts = string.split(token, ':')
if len(parts) > 2: #- We've found more than one colon. Break loop and raise an error.
bad_token_found = 1
bad_token = token
else:
if parts[1] == 'tcp' or parts[1] == 'udp': #-upd and tcp are the only valid protocols
if portlist == "":
portlist = token
else:
portlist = portlist + ',' + token
else: #- Found a protocol other than tcp or udp. Break loop
bad_token_found = 1
bad_token = token
pass
except:
if token != "":
if portlist == "":
portlist = token + ":tcp"
else:
portlist = portlist + ',' + token + ':tcp'
else:
pass
if bad_token_found == 1:
pass
ButtonChoiceWindow(screen, _("Invalid Choice"),
_("Warning: %s is not a valid port." %token),
buttons = [ _("OK") ], width = 40)
screen.popWindow()
else:
firewall.portlist = portlist
screen.popWindow()
if rc == TEXT_OK_CHECK or result == TEXT_F12_CHECK:
break
screen.popWindow()
firewall.trustdevs = []
for device in self.netCBs.keys():
if self.netCBs[device].selected():
firewall.trustdevs.append(device)
# firewall.portlist = self.other.value()
firewall.dhcp = self.dhcp.selected()
firewall.ssh = self.ssh.selected()
firewall.telnet = self.telnet.selected()
firewall.http = self.http.selected()
firewall.smtp = self.smtp.selected()
firewall.ftp = self.ftp.selected()
if self.disabled.selected():
firewall.enabled = 0
else:
firewall.enabled = 1
if self.paranoid.selected():
firewall.policy = 0
else:
firewall.policy = 1
return INSTALL_OK
def radiocb(self, args):
(firewall, widget) = args
if widget == self.disabled:
firewall.enabled = 0
elif widget == self.simple:
firewall.policy = 1
elif widget == self.paranoid:
firewall.policy = 0
else:
raise RuntimeError, "never reached"
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