konfiguracja firewalla

Konfiguracja serwerów, usług, itp.
koneser
Posty: 12
Rejestracja: 14 czerwca 2010, 19:59

konfiguracja firewalla

Post autor: koneser »

Witam.

Mam mały problem z firewallem poniżej zamieściłem fragment tego pliku jest to u mnie /etc/init.d/wl.
Chodzi o to, że czasami zmieniam ip w ostatnich dwóch linijkach np. z 99 na 90 jest to niżej pokazane po czym muszę wykonać ten plik czyli

Kod: Zaznacz cały

./etc/init.d/wl
aby dokonały się zmiany. Tylko, że wtedy muszę zrestartować serwer ponieważ nie odpowiada na pingi. Co jest dziwne bo mam zainstalowaną sambę i mogę bez problemów wejść do każdego udostępnionego katalogu.

Serwer przydziela mi automatycznie po mac adresach każdemu komputerowi IP. I to działa po wykonaniu tego pliku. Z każdego komputera mogę pingować inny ale nie serwer.

Ta zmiana tych IP (j.w. z 99 na 90) jest mi potrzebna abym mógł się logować z zewnątrz na wybrany komputer.

Co zrobić aby zmiany zaszły bez restartu serwera?

Kod: Zaznacz cały

echo 1 > /proc/sys/net/ipv4/ip_forward
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
echo 1 > /proc/sys/net/ipv4/conf/all/rp_filter

iptables -F
iptables -X
iptables -t nat -X
iptables -t nat -F

iptables -P INPUT DROP
iptables -P FORWARD DROP
iptables -P OUTPUT ACCEPT

iptables -A INPUT -i lo -j ACCEPT
iptables -A FORWARD -o lo -j ACCEPT

.
.
.

iptables -A INPUT -s 0/0 -d XXX.XXX.XXX.XXX -p tcp --dport 22 -j ACCEPT
iptables -A OUTPUT -s 0/0 -d XXX.XXX.XXX.XXX -p tcp --dport 22 -j ACCEPT
iptables -A INPUT -s 0/0 -d XXX.XXX.XXX.XXX -p udp --dport 22 -j ACCEPT
iptables -A OUTPUT -s 0/0 -d XXX.XXX.XXX.XXX -p udp --dport 22 -j ACCEPT

.
.
.

iptables -A INPUT -i eth1 -p tcp --dport 137:139 -j ACCEPT
iptables -A INPUT -i eth1 -p udp --dport 137:139 -j ACCEPT

iptables -A INPUT -i eth1 -p tcp --dport 21 -j ACCEPT
iptables -A INPUT -i eth1 -p udp --dport 21 -j ACCEPT

iptables -A INPUT -i eth1 -p tcp --dport 53 -j ACCEPT
iptables -A INPUT -i eth1 -p udp --dport 53 -j ACCEPT
iptables -A INPUT -i eth1 -p tcp --dport 113 -j ACCEPT
iptables -A INPUT -i eth1 -p udp --dport 113 -j ACCEPT
iptables -A INPUT -i eth1 -p tcp --dport 3050 -j ACCEPT
iptables -A INPUT -i eth1 -p udp --dport 3050 -j ACCEPT

iptables -A INPUT -s 0/0 -d XXX.XXX.XXX.XXX -p tcp --dport 3050 -j ACCEPT
iptables -A OUTPUT -s 0/0 -d XXX.XXX.XXX.XXX -p tcp --dport 3050 -j ACCEPT
iptables -A INPUT -s 0/0 -d XXX.XXX.XXX.XXX -p udp --dport 3050 -j ACCEPT
iptables -A OUTPUT -s 0/0 -d XXX.XXX.XXX.XXX -p udp --dport 3050 -j ACCEPT

iptables -A INPUT -j ACCEPT -m state --state ESTABLISHED,RELATED
iptables -A FORWARD -j ACCEPT -m state --state ESTABLISHED,RELATED
iptables -A OUTPUT -j ACCEPT -m state --state ESTABLISHED,RELATED




#komp
iptables -t nat -A POSTROUTING -s 192.168.1.33 -j MASQUERADE
iptables -A FORWARD -m mac --mac-source 00:0B:6A:8D:3A:32 -j ACCEPT

iptables -A PREROUTING -t nat -i eth0 -d XXX.XXX.XXX.XXX -p tcp --dport 3456 -j DNAT --to-destination 192.168.1.99:5900
iptables -A FORWARD -i eth0 -d 192.168.1.99 -j ACCEPT

Kod: Zaznacz cały

iptables -A PREROUTING -t nat -i eth0 -d XXX.XXX.XXX.XXX -p tcp --dport 3456 -j DNAT --to-destination 192.168.1.90:5900
iptables -A FORWARD -i eth0 -d 192.168.1.90 -j ACCEPT
Awatar użytkownika
Yampress
Administrator
Posty: 6422
Rejestracja: 09 sierpnia 2007, 21:41
Lokalizacja: PL

Post autor: Yampress »

Zobacz takie coś:

Kod: Zaznacz cały

KOMPUTER="10.0.0.20"
lub
KOMPUTERY="10.0.0.20,10.0.0.21" -< "przypadek z pulą adresów"

iptables -A INPUT -s 0/0 -d $KOMPUTER -p tcp --dport 22 -j ACCEPT
Zmieniasz tylko potem adres ip w linijce KOMPUTER i nie musisz się bawić ze zmianą we wszystkich linijkach.

To odpowiada za sambę, że możesz na nią wejść:

Kod: Zaznacz cały

iptables -A INPUT -i eth1 -p tcp --dport 137:139 -j ACCEPT
iptables -A INPUT -i eth1 -p udp --dport 137:139 -j ACCEPT

Aby móc odbierać/ wysyłać pingi musisz wpuścić protokół icmp i tak skonfigurować aby wypuścić odpowiedź ping.

Pomyśl nad takim rozwiązaniem -> bardziej je rozbuduj

Kod: Zaznacz cały

iptables -A INPUT -i eth1 -p icmp  -j ACCEPT
Istnieje jeszcze zapis

Kod: Zaznacz cały

 --icmp-type nazwa typu (echo-request,echo-reply, port-unrealcachable... itp)
Zapoznaj się z tym:

Kod: Zaznacz cały

man icmp

Kod: Zaznacz cały

iptables -A INPUT -i eth1 -p icmp  --icmp-type echo-request -j ACCEPT
koneser
Posty: 12
Rejestracja: 14 czerwca 2010, 19:59

Post autor: koneser »

Wielkie dzięki za pomoc.

Rozwiązaniem mojego problemu jest, tak jak doradziłeś:

Kod: Zaznacz cały

iptables -A INPUT -i eth1 -p icmp -j ACCEPT
Korzystając z okazji od razu dodałem kod zgodnie z Twoją radą.

Kod: Zaznacz cały

KOMPUTER="76"

if [ "$#" = "1" ]; then
KOMPUTER=$1
fi

 
Przy okazji bo widzę że jesteś obcykany

Co do samby na niektórych kontach działa bardzo szybko, a na niektórych bardzo zamula. Np. u mnie, czasami mam tak, że jak wchodzę do jakiegoś katalogu to za pierwszym razem wyświetla mi błąd, a dopiero po ponownym wybraniu tego katalogu mogę się dostać do zasobów. To samo tyczy się katalogów na hasło. Czasami za pierwszym razem wyrzuca mi błąd, że taki użytkownik nie istnieje np. dla katalogu pub, a dopiero za drugim razem mogę się zalogować bez problemów.

Poniżej zamieszczam całość pliku samba.conf

Kod: Zaznacz cały

#
# Sample configuration file for the Samba suite for Debian GNU/Linux.
#
#
# This is the main Samba configuration file. You should read the
# smb.conf(5) manual page in order to understand the options listed
# here. Samba has a huge number of configurable options most of which
# are not shown in this example
#
# Any line which starts with a ; (semi-colon) or a # (hash)
# is a comment and is ignored. In this example we will use a #
# for commentary and a ; for parts of the config file that you
# may wish to enable
#
# NOTE: Whenever you modify this file you should run the command
# "testparm" to check that you have not made any basic syntactic
# errors.
#

#======================= Global Settings =======================

[global]

## Browsing/Identification ###

# Change this to the workgroup/NT-domain name your Samba server will part of
   workgroup = YYY

# server string is the equivalent of the NT Description field
   server string = %h server (Samba %v)

# Windows Internet Name Serving Support Section:
# WINS Support - Tells the NMBD component of Samba to enable its WINS Server
   wins support = yes
   unix password sync = no
   add machine script = /usr/sbin/useradd -s /bin/false %u
   map to guest = Bad User
   username map = /etc/samba/smbusers

# WINS Server - Tells the NMBD components of Samba to be a WINS Client
# Note: Samba can be either a WINS Server, or a WINS Client, but NOT both
#   wins server = XXX.XXX.XXX.XXX

# If we receive WINS server info from DHCP, override the options above.
#   include = /etc/samba/dhcp.conf

# This will prevent nmbd to search for NetBIOS names through DNS.
   dns proxy = no
   netbios name = debian
# What naming service and in what order should we use to resolve host names
# to IP addresses
   name resolve order = lmhosts host wins bcast

#### Networking ####

# The specific set of interfaces / networks to bind to
# This can be either the interface name or an IP address/netmask;
# interface names are normally preferred
   interfaces = 192.168.XXX.XXX 127.0.0.1
   hosts allow = 192.168.XXX.

# Only bind to the named interfaces and/or networks; you must use the
# 'interfaces' option above to use this.
# It is recommended that you enable this feature if your Samba machine is
# not protected by a firewall or is a firewall itself.  However, this
# option cannot handle dynamic or non-broadcast interfaces correctly.
   bind interfaces only = yes



#### Debugging/Accounting ####

# This tells Samba to use a separate log file for each machine
# that connects
   log file = /var/log/samba/log.%m

# Put a capping on the size of the log files (in Kb).
   max log size = 1000

# If you want Samba to only log through syslog then set the following
# parameter to 'yes'.
;   syslog only = no

# We want Samba to log a minimum amount of information to syslog. Everything
# should go to /var/log/samba/log.{smbd,nmbd} instead. If you want to log
# through syslog you should set the following parameter to something higher.
   syslog = 0

# Do something sensible when Samba crashes: mail the admin a backtrace
   panic action = /usr/share/samba/panic-action %d


####### Authentication #######

# "security = user" is always a good idea. This will require a Unix account
# in this server for every user accessing the server. See
# /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/ServerType.html
# in the samba-doc package for details.
   security = domain
   local master = yes
   guest ok = yes
#   browseable = yes

# You may wish to use password encryption.  See the section on
# 'encrypt passwords' in the smb.conf(5) manpage before enabling.
   encrypt passwords = yes

# If you are using encrypted passwords, Samba will need to know what
# password database type you are using.
   passdb backend = XXXXXX

   obey pam restrictions = yes

#   guest account = xxxxxxxxxxxx
#   invalid users = root

# This boolean parameter controls whether Samba attempts to sync the Unix
# password with the SMB password when the encrypted SMB password in the
# passdb is changed.
;   unix password sync = no

# For Unix password sync to work on a Debian GNU/Linux system, the following
# parameters must be set (thanks to Ian Kahan <<kahan@informatik.tu-muenchen.de> for
# sending the correct chat script for the passwd program in Debian Sarge).
   passwd program = /usr/bin/passwd %u
   passwd chat = *Enter\snew\sUNIX\spassword:* %n\n *Retype\snew\sUNIX\spassword:* %n\n *password\supdated\ssuccessfully* .

# This boolean controls whether PAM will be used for password changes
# when requested by an SMB client instead of the program listed in
# 'passwd program'. The default is 'no'.
;   pam password change = no

########## Domains ###########

# Is this machine able to authenticate users. Both PDC and BDC
# must have this setting enabled. If you are the BDC you must
# change the 'domain master' setting to no
#
   domain logons = yes
   domain master = yes
   local master = yes
   preferred master = yes
#   nt smb support = yes
   nt pipe support = yes
   nt acl support = no
#   security = domain
#   domain controller = 192.168.1.XXX
#
# The following setting only takes effect if 'domain logons' is set
# It specifies the location of the user's profile directory
# from the client point of view)
# The following required a [profiles] share to be setup on the
# samba server (see below)
;   logon path = \\%N\profiles\%U
# Another common choice is storing the profile in the user's home directory
   logon path = \\%L\%U\profile

# The following setting only takes effect if 'domain logons' is set
# It specifies the location of a user's home directory (from the client
# point of view)
   logon drive = H:
   logon home = \\%L\%U

# The following setting only takes effect if 'domain logons' is set
# It specifies the script to run during logon. The script must be stored
# in the [netlogon] share
# NOTE: Must be store in 'DOS' file format convention
   logon script = scripts/logon.bat

# This allows Unix users to be created on the domain controller via the SAMR
# RPC pipe.  The example command creates a user account with a disabled Unix
# password; please adapt to your needs
; add user script = /usr/sbin/adduser --quiet --disabled-password --gecos "" %u

########## Printing ##########

# If you want to automatically load your printer list rather
# than setting them up individually then you'll need this
   load printers = yes

# lpr(ng) printing. You may wish to override the location of the
# printcap file
#   printing = bsd
   printcap name = /etc/printcap

# CUPS printing.  See also the cupsaddsmb(8) manpage in the
# cupsys-client package.
   printing = cups
#   printcap name = cups
#status = yes
# When using [print$], root is implicitly a 'printer admin', but you can
# also give this right to other users to add drivers and set printer
# properties
;   printer admin = @ntadmin


############ Misc ############

# Using the following line enables you to customise your configuration
# on a per machine basis. The %m gets replaced with the netbios name
# of the machine that is connecting
;   include = /home/samba/etc/smb.conf.%m

# Most people will find that this option gives better performance.
# See smb.conf(5) and /usr/share/doc/samba-doc/htmldocs/Samba3-HOWTO/speed.html
# for details
# You may want to add the following on a Linux system:
#         SO_RCVBUF=8192 SO_SNDBUF=8192
   socket options = TCP_NODELAY

# The following parameter is useful only if you have the linpopup package
# installed. The samba maintainer and the linpopup maintainer are
# working to ease installation and configuration of linpopup and samba.
;   message command = /bin/sh -c '/usr/bin/linpopup "%f" "%m" %s; rm %s' &

# Domain Master specifies Samba to be the Domain Master Browser. If this
# machine will be configured as a BDC (a secondary logon server), you
# must set this to 'no'; otherwise, the default behavior is recommended.
;   domain master = auto

# Some defaults for winbind (make sure you're not using the ranges
# for something else.)
;   idmap uid = 10000-20000
;   idmap gid = 10000-20000
;   template shell = /bin/bash
;
; The following was the default behaviour in sarge
; but samba upstream reverted the default because it might induce
; performance issues in large organizations
; See #368251 for some of the consequences of *not* having
; this setting and smb.conf(5) for all details
;
;   winbind enum groups = yes
;   winbind enum users = yes

#======================= Share Definitions =======================

[zasob1]
   path=/home/samba
   comment = samba
   browseable = no

# By default, the home directories are exported read-only. Change next
# parameter to 'yes' if you want to be able to write to them.
   write ok = yes

# File creation mask is set to 0700 for security reasons. If you want to
# create files with group=rw permissions, set next parameter to 0775.
   create mask = 0777

# Directory creation mask is set to 0700 for security reasons. If you want to
# create dirs. with group=rw permissions, set next parameter to 0775.
   directory mask = 0777

# Restrict access to home directories
# to the one of the authenticated user
# This might need tweaking when using external authentication schemes
;   valid users = YYY
   public = yes
   guest ok =yes
   share modes = yes
   create mode = 0777

# Un-comment the following and create the netlogon directory for Domain Logons
# (you need to configure Samba to act as a domain controller too.)

[zasob2]
   path=/media/zasob
   comment = serwer
   browseable = yes

# By default, the home directories are exported read-only. Change next
# parameter to 'yes' if you want to be able to write to them.
   write ok = yes

# File creation mask is set to 0700 for security reasons. If you want to
# create files with group=rw permissions, set next parameter to 0775.
   create mask = 0777

# Directory creation mask is set to 0700 for security reasons. If you want to
# create dirs. with group=rw permissions, set next parameter to 0775.
   directory mask = 0777

# Restrict access to home directories
# to the one of the authenticated user
# This might need tweaking when using external authentication schemes
;   valid users = YYY
   public = yes
   share modes = yes
   create mode = 0777
# Un-comment the following and create the netlogon directory for Domain Logons
# (you need to configure Samba to act as a domain controller too.)

[pub]
   path = /media/pub
   comment = pub
   browseable = yes

   write ok = yes
#   security = user
   public = no
   guest ok = no
   share modes = no
   create mode = 0777
   valid users = nazwa

#   create mask = 0777
#   valid user = %S
#   browseable = yes
#   directory mask = 0777
#   public = no
#   share modes = yes
#   create mode = 0777

#   writable = yes
#   write list = user
#   password level = 8
#   username level = 8
#   smb password file = /usr/bin/smbpasswd


[zasob3]
   path = /home/zasob3/
   comment = zasob3
   browseable = yes

   write ok = yes
   #   security = user
   public = no
   guest ok = no
   share modes = no
   create mode = 0777

[zasob4]
   path = /media/zasob4/
   comment = zasob4
   browseable = yes
   write ok = yes
   #   security = user
   public = no
   guest ok = no
   share modes = no
   create mode = 0777
   valid users = user
############################################################
############################################################

#[dane]
#path=/home/dane
#comment=dane
#browseable=yes
#write ok=yes
#create mask=077
#directory mask=077
#create mode=077

[netlogon]
   comment = Network Logon Service
   path = /home/samba/netlogon
;   guest ok = yes
   writable = no
   share modes = no
   read only = yes
   browseable = no

# Un-comment the following and create the profiles directory to store
# users profiles (see the "logon path" option above)
# (you need to configure Samba to act as a domain controller too.)
# The path below should be writable by all users so that their
# profile directory may be created the first time they log on
;[profiles]
   comment = Users profiles
   path = /home/samba/profiles
;   guest ok = no
   browseable = yes
;   create mask = 0600
;   directory mask = 0700

#[printers$]
#   comment = All Printers
#   browseable = yes
#   path = /var/spool/samba
#   printable = yes
#   public = yes
#   guest ok= yes
#   writable = yes
#   create mode = 0700

# Windows clients look for this share name as a source of downloadable
# printer drivers
#[print$]
#   comment = Printer Drivers
#   path = /var/lib/samba/printers
#   public = yes
#   printable = yes
#   browseable = yes
#   read only = no
#   guest ok = yes
# Uncomment to allow remote administration of Windows print drivers.
# Replace 'ntadmin' with the name of the group your admin users are
# members of.
#   write list = root,YYY, @ntadmin

# A sample share for sharing your CD-ROM with others.
;[cdrom]
;   comment = Samba server's CD-ROM
;   writable = no
;   locking = no
;   path = /cdrom
;   public = yes

# The next two parameters show how to auto-mount a CD-ROM when the
#       cdrom share is accesed. For this to work /etc/fstab must contain
#       an entry like this:
#
#       /dev/scd0   /cdrom  iso9660 defaults,noauto,ro,user   0 0
#
# The CD-ROM gets unmounted automatically after the connection to the
#
# If you don't want to use auto-mounting/unmounting make sure the CD
#       is mounted on /cdrom
#
;   preexec = /bin/mount /cdrom
;   postexec = /bin/umount /cdrom 
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