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azeem ahmad

2004-May-27 21:03 UTC

[Samba] iptables and samba

hi
i m using the script below
-------------------------------------------------------------------------------------------------------------------------------------
iptables -F
iptables -t nat -F
iptables -P INPUT DROP
iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 8080 -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 22   -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 53   -j ACCEPT
iptables -A INPUT -i eth0 -p udp --dport 53   -j ACCEPT
iptables -A INPUT -i eth0 -p udp --dport 137  -j ACCEPT
iptables -A INPUT -i eth0 -p udp --dport 138  -j ACCEPT
iptables -A INPUT -i eth0 -p tcp --dport 139  -j ACCEPT

-------------------------------------------------------------------------------------------------------------------------------------

i have two shares on samba server "Soft and linux" in these shares
there are
many folders. whenever i run the above script and then i open the share it 
takes atleast 4  minutes to open the share. but it doesnt take time while 
browsing inside share.
mean there is a folder on soft share like soft/adobe/acrobat/acrobat6
when i double click on soft it takes atleast 4 minutes but after that when i 
click on adobe then acrobat then acrobat6 it takes now time it just browse 
them normally. same problem is with the other share named linux.
but if i dont run this script then all shares work fine with no delay
this problem only occures first time. mean when i browse the share next time 
it doesnt occur

Regards
Azeem

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Andrew Gaffney

2004-May-27 21:36 UTC

head link

[Samba] iptables and samba

azeem ahmad wrote:> hi
> i m using the script below
>
-------------------------------------------------------------------------------------------------------------------------------------
> 
> iptables -F
> iptables -t nat -F
> iptables -P INPUT DROP
> iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
> iptables -A INPUT -i eth0 -p tcp --dport 8080 -j ACCEPT
> iptables -A INPUT -i eth0 -p tcp --dport 22   -j ACCEPT
> iptables -A INPUT -i eth0 -p tcp --dport 53   -j ACCEPT
> iptables -A INPUT -i eth0 -p udp --dport 53   -j ACCEPT
> iptables -A INPUT -i eth0 -p udp --dport 137  -j ACCEPT
> iptables -A INPUT -i eth0 -p udp --dport 138  -j ACCEPT
> iptables -A INPUT -i eth0 -p tcp --dport 139  -j ACCEPT
> 
>
-------------------------------------------------------------------------------------------------------------------------------------
> 
> 
> i have two shares on samba server "Soft and linux" in these
shares there
> are many folders. whenever i run the above script and then i open the 
> share it takes atleast 4  minutes to open the share. but it doesnt take 
> time while browsing inside share.
> mean there is a folder on soft share like soft/adobe/acrobat/acrobat6
> when i double click on soft it takes atleast 4 minutes but after that 
> when i click on adobe then acrobat then acrobat6 it takes now time it 
> just browse them normally. same problem is with the other share named 
> linux.
> but if i dont run this script then all shares work fine with no delay
> this problem only occures first time. mean when i browse the share next 
> time it doesnt occur
This is a complete shot in the dark. Windows 2000 (probably) and XP (definately)
will look for a SMB server on port 445 first by default. Since you have '-j 
DROP', the requests to 445 don't get a response. It takes a little bit
to
timeout and then Windows probably tries to connect again. I bet if you add the 
following iptables rule, the problem will go away:

iptables -A INPUT -i eth0 -p all --dport 445 -j REJECT

-- 
Andrew Gaffney
Network Administrator
Skyline Aeronautics, LLC.
636-357-1548

azeem ahmad

2004-May-27 21:48 UTC

head link

[Samba] iptables and samba

its samba-2.2.7a-7.9.0 and i tried rejecting port 445 for tcp and udp but it 
isnt working properly yet

Regards
Azeem
>From: Tom Skeren <tms3@fsklaw.net>
>To: Andrew Gaffney <agaffney@skylineaero.com>
>CC: azeem ahmad <azeem484@hotmail.com>,  samba@lists.samba.org
>Subject: Re: [Samba] iptables and samba
>Date: Thu, 27 May 2004 14:41:07 -0700
>
>Andrew Gaffney wrote:
>
>>azeem ahmad wrote:
>>
>>>hi
>>>i m using the script below
>>>-------------------------------------------------------------------------------------------------------------------------------------
>>>iptables -F
>>>iptables -t nat -F
>>>iptables -P INPUT DROP
>>>iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
>>>iptables -A INPUT -i eth0 -p tcp --dport 8080 -j ACCEPT
>>>iptables -A INPUT -i eth0 -p tcp --dport 22   -j ACCEPT
>>>iptables -A INPUT -i eth0 -p tcp --dport 53   -j ACCEPT
>>>iptables -A INPUT -i eth0 -p udp --dport 53   -j ACCEPT
>>>iptables -A INPUT -i eth0 -p udp --dport 137  -j ACCEPT
>>>iptables -A INPUT -i eth0 -p udp --dport 138  -j ACCEPT
>>>iptables -A INPUT -i eth0 -p tcp --dport 139  -j ACCEPT
>>>
>>>-------------------------------------------------------------------------------------------------------------------------------------
>>>
>>>i have two shares on samba server "Soft and linux" in
these shares there
>>>are many folders. whenever i run the above script and then i open
the
>>>share it takes atleast 4  minutes to open the share. but it doesnt
take
>>>time while browsing inside share.
>>>mean there is a folder on soft share like
soft/adobe/acrobat/acrobat6
>>>when i double click on soft it takes atleast 4 minutes but after
that
>>>when i click on adobe then acrobat then acrobat6 it takes now time
it
>>>just browse them normally. same problem is with the other share
named
>>>linux.
>>>but if i dont run this script then all shares work fine with no
delay
>>>this problem only occures first time. mean when i browse the share
next
>>>time it doesnt occur
>>
>>
>>This is a complete shot in the dark. Windows 2000 (probably) and XP 
>>(definately) will look for a SMB server on port 445 first by default. 
>>Since you have '-j DROP', the requests to 445 don't get a
response. It
>>takes a little bit to timeout and then Windows probably tries to connect
>>again. I bet if you add the following iptables rule, the problem will go
>>away:
>>
>>iptables -A INPUT -i eth0 -p all --dport 445 -j REJECT
>>
>If you have Samba 3.x it will share on port 445.
>
>
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azeem ahmad

2004-May-27 22:02 UTC

head link

[Samba] iptables and samba

the problem has been partially soved by REJECTing or ACCEPTing the port 445. 
the effect of ACCEPTing or REJECTing is same and that is:
as i stated before that i have two shares named soft and linux. the problem 
appeares while accessing both shares for the first time (note only for the 
first time. if i close the share and then triy again the problem doesnt 
occur unless i restart my client computer) now the problem has been 
partially solved as if i access one of the two shares it takes 4 minutes but 
if then i access the 2nd share it doent take time. while before adding this 
rule it was talking time for the both shares

Regards
Azeem
>From: Andrew Gaffney <agaffney@skylineaero.com>
>To: Tom Skeren <tms3@fsklaw.net>
>CC: azeem ahmad <azeem484@hotmail.com>,  samba@lists.samba.org
>Subject: Re: [Samba] iptables and samba
>Date: Thu, 27 May 2004 16:43:39 -0500
>
>Tom Skeren wrote:
>>Andrew Gaffney wrote:
>>
>>>azeem ahmad wrote:
>>>
>>>>hi
>>>>i m using the script below
>>>>-------------------------------------------------------------------------------------------------------------------------------------
>>>>
>>>>iptables -F
>>>>iptables -t nat -F
>>>>iptables -P INPUT DROP
>>>>iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
>>>>iptables -A INPUT -i eth0 -p tcp --dport 8080 -j ACCEPT
>>>>iptables -A INPUT -i eth0 -p tcp --dport 22   -j ACCEPT
>>>>iptables -A INPUT -i eth0 -p tcp --dport 53   -j ACCEPT
>>>>iptables -A INPUT -i eth0 -p udp --dport 53   -j ACCEPT
>>>>iptables -A INPUT -i eth0 -p udp --dport 137  -j ACCEPT
>>>>iptables -A INPUT -i eth0 -p udp --dport 138  -j ACCEPT
>>>>iptables -A INPUT -i eth0 -p tcp --dport 139  -j ACCEPT
>>>>
>>>>-------------------------------------------------------------------------------------------------------------------------------------
>>>>
>>>>
>>>>i have two shares on samba server "Soft and linux" in
these shares there
>>>>are many folders. whenever i run the above script and then i
open the
>>>>share it takes atleast 4  minutes to open the share. but it
doesnt take
>>>>time while browsing inside share.
>>>>mean there is a folder on soft share like
soft/adobe/acrobat/acrobat6
>>>>when i double click on soft it takes atleast 4 minutes but after
that
>>>>when i click on adobe then acrobat then acrobat6 it takes now
time it
>>>>just browse them normally. same problem is with the other share
named
>>>>linux.
>>>>but if i dont run this script then all shares work fine with no
delay
>>>>this problem only occures first time. mean when i browse the
share next
>>>>time it doesnt occur
>>>
>>>
>>>
>>>This is a complete shot in the dark. Windows 2000 (probably) and XP 
>>>(definately) will look for a SMB server on port 445 first by
default.
>>>Since you have '-j DROP', the requests to 445 don't get
a response. It
>>>takes a little bit to timeout and then Windows probably tries to
connect
>>>again. I bet if you add the following iptables rule, the problem
will go
>>>away:
>>>
>>>iptables -A INPUT -i eth0 -p all --dport 445 -j REJECT
>>>
>>If you have Samba 3.x it will share on port 445.
>
>Okay, so you can change that REJECT to ACCEPT.
>
>--
>Andrew Gaffney
>Network Administrator
>Skyline Aeronautics, LLC.
>636-357-1548
>
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azeem ahmad

2004-May-29 08:38 UTC

head link

[Samba] iptables and samba

hi all
this is the output of tcpdump that it shows continously in the four minutes 
that it takes to open the share
------------------------------------------------------------------------------------------------------------------------------------
02:28:17.294943 192.168.0.100.netbios-ssn > 192.168.0.2.1049: P 
28200:28268(68) ack 27225 win 5840 NBT Packet (DF)
02:28:17.295312 192.168.0.2.1049 > 192.168.0.100.netbios-ssn: P 
27225:27363(138) ack 28268 win 63495 NBT Packet (DF)
02:28:17.295422 192.168.0.100.netbios-ssn > 192.168.0.2.1049: P 
28268:28307(39) ack 27363 win 5840 NBT Packet (DF)
02:28:17.295768 192.168.0.2.1049 > 192.168.0.100.netbios-ssn: P 
27363:27408(45) ack 28307 win 63456 NBT Packet (DF)
02:28:17.295873 192.168.0.100.netbios-ssn > 192.168.0.2.1049: P 
28307:28346(39) ack 27408 win 5840 NBT Packet (DF)
02:28:17.296297 192.168.0.2.1049 > 192.168.0.100.netbios-ssn: P 
27408:27501(93) ack 28346 win 63417 NBT Packet (DF)
-------------------------------------------------------------------------------------------------------------------------------------

Regards
Azeem

>From: "azeem ahmad" <azeem484@hotmail.com>
>To: samba@lists.samba.org
>Subject: Re: [Samba] iptables and samba
>Date: Thu, 27 May 2004 22:02:20 +0000
>
>
>the problem has been partially soved by REJECTing or ACCEPTing the port 
>445. the effect of ACCEPTing or REJECTing is same and that is:
>as i stated before that i have two shares named soft and linux. the problem 
>appeares while accessing both shares for the first time (note only for the 
>first time. if i close the share and then triy again the problem doesnt 
>occur unless i restart my client computer) now the problem has been 
>partially solved as if i access one of the two shares it takes 4 minutes 
>but if then i access the 2nd share it doent take time. while before adding 
>this rule it was talking time for the both shares
>
>Regards
>Azeem
>
>>From: Andrew Gaffney <agaffney@skylineaero.com>
>>To: Tom Skeren <tms3@fsklaw.net>
>>CC: azeem ahmad <azeem484@hotmail.com>,  samba@lists.samba.org
>>Subject: Re: [Samba] iptables and samba
>>Date: Thu, 27 May 2004 16:43:39 -0500
>>
>>Tom Skeren wrote:
>>>Andrew Gaffney wrote:
>>>
>>>>azeem ahmad wrote:
>>>>
>>>>>hi
>>>>>i m using the script below
>>>>>-------------------------------------------------------------------------------------------------------------------------------------
>>>>>
>>>>>iptables -F
>>>>>iptables -t nat -F
>>>>>iptables -P INPUT DROP
>>>>>iptables -A INPUT -m state --state ESTABLISHED,RELATED -j
ACCEPT
>>>>>iptables -A INPUT -i eth0 -p tcp --dport 8080 -j ACCEPT
>>>>>iptables -A INPUT -i eth0 -p tcp --dport 22   -j ACCEPT
>>>>>iptables -A INPUT -i eth0 -p tcp --dport 53   -j ACCEPT
>>>>>iptables -A INPUT -i eth0 -p udp --dport 53   -j ACCEPT
>>>>>iptables -A INPUT -i eth0 -p udp --dport 137  -j ACCEPT
>>>>>iptables -A INPUT -i eth0 -p udp --dport 138  -j ACCEPT
>>>>>iptables -A INPUT -i eth0 -p tcp --dport 139  -j ACCEPT
>>>>>
>>>>>-------------------------------------------------------------------------------------------------------------------------------------
>>>>>
>>>>>
>>>>>i have two shares on samba server "Soft and linux"
in these shares
>>>>>there are many folders. whenever i run the above script and
then i open
>>>>>the share it takes atleast 4  minutes to open the share. but
it doesnt
>>>>>take time while browsing inside share.
>>>>>mean there is a folder on soft share like
soft/adobe/acrobat/acrobat6
>>>>>when i double click on soft it takes atleast 4 minutes but
after that
>>>>>when i click on adobe then acrobat then acrobat6 it takes
now time it
>>>>>just browse them normally. same problem is with the other
share named
>>>>>linux.
>>>>>but if i dont run this script then all shares work fine with
no delay
>>>>>this problem only occures first time. mean when i browse the
share next
>>>>>time it doesnt occur
>>>>
>>>>
>>>>
>>>>This is a complete shot in the dark. Windows 2000 (probably) and
XP
>>>>(definately) will look for a SMB server on port 445 first by
default.
>>>>Since you have '-j DROP', the requests to 445 don't
get a response. It
>>>>takes a little bit to timeout and then Windows probably tries to
connect
>>>>again. I bet if you add the following iptables rule, the problem
will go
>>>>away:
>>>>
>>>>iptables -A INPUT -i eth0 -p all --dport 445 -j REJECT
>>>>
>>>If you have Samba 3.x it will share on port 445.
>>
>>Okay, so you can change that REJECT to ACCEPT.
>>
>>--
>>Andrew Gaffney
>>Network Administrator
>>Skyline Aeronautics, LLC.
>>636-357-1548
>>
>
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