PPTP and PIX
Hello
I have a Microsoft PC on the local network and want to connect via the PPTP VPN connection with another network. I know that I must leave the port TCP 1723, and ID 47 (GRE) from inside the network. Of course require NAT this PC.
But how to activate ID 47 in PIX configuration?
I thank.
cciesec list access permit tcp any any eq newspaper 1723
access-list cciesec allow accord any any newspaper
cciesec access to the interface inside group
fixup protocol pptp 1723
Easy right?
Tags: Cisco Security
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If you haven't already done so, you must clear the SAs Phase I on both sides after you make a change to the map. Once the Phase I SA has been cleared, he renegotiate and reset Phase II. If you alerady made this, the only other thing I can think is manually re-enter the secrets disclosed in advance on tunnel groups then erase both the Phase I and Phase II SAs.
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icmp permit any unreachable outside
icmp permit any time-exceeded outside
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icmp permit any echo-reply outside
icmp permit any information-reply outside
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: end
Thank you
Etienne
Happy to help and please kindly mark the message as answered if you have not more than other questions. Thank you.
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Outdoor access for users of PPTP on PIX
Hello everyone I have a PIX 506 6.3 (5) software running and configured to accept PPTP VPN from outside connections. It works very well, the PPTP users get a local IP address of the configured pool and can access inside the hosts as expected. What I want now, is that PPTP users can access the internet from here like inside hosts using dynamic NAT to the external interface. On ASA5505 this is achieved by the same-security-traffic permit intra-interface and corresponding nat (outside) configuration (with IPsec-VPN-Clients, not PPTP). On the PIX with the PPTP clients, I can not get this result. Is it possible somehow? Thanks a lot for any suggestion, Grischa
grischast wrote:
Dear all I have a PIX 506 running Software 6.3(5) and configured it to accept PPTP VPN connections from outside. This works very well, PPTP users get a local IP address from the configured pool and can access inside hosts as expected. What I want now is that PPTP users can access the internet from here just like inside hosts via dynamic NAT to the outside interface. On ASA5505 this is achieved by same-security-traffic permit intra-interface and corresponding nat (outside) configuration (with IPsec-VPN-Clients, not PPTP, though). On the PIX with PPTP clients I cannot achieve this result. Is it possible somehow? Thanks a lot for any suggestion, Grischa
Grischa
Unfortunately no, it is not possible on the pix 506 v6.x running. The reason is that the feature you need is called "bundling", which is activated by using the command "permit same-security-traffic intra-interface". But it is not available on code v.6.x pix.
It is available on pix v7.x code and leave, but unfortunately the pix 506 cannot be upgraded to code v7.x. The minimum pix model that can run code v7.x is a pix 515E.
Jon
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VPN site to Site between 6.3 (3) PIX and PIX 7.0 (1)
Hi all
I am configuring a VPN site-to site between my office and a new site. This is my first time doing a real VPN site to site, in the past we have always just used MS PPTP VPN.
My office firewall is a 6.3 (3) 506th PIX running, and unfortunately this can not be upgraded to 7.0.
My new site has a pair of PIX 525 in a failover configuration, running version 7.0 (1).
The only documentation that I could find on this subject is a http://www.cisco.com/en/US/products/hw/vpndevc/ps2030/products_configuration_example09186a0080094761.shtml, which corresponds to an even earlier version of the software firewall (although orders seemed to be valid on the 6.3 software).
I ran through the VPN Wizard in the ASDM on the new firewall of sites, and the output produced in the firewall rules is not really what I expected. Commands like 'ISAKMP key' have been depreciated and replaced by "tunnel-group.
What I'm really after a pointer in the right direction for certain documents which covers this type of scenario, I can't be the only one trying the link between the different versions of PIX.
Hi M8,
In quick words, more of the config is always the same (sets of transform, ISAKMP policy, Crypto Maps and Crypto ACL).
The only thing that changes is the:
ISAKMP key * address x.x.x.x
and it is replaced by the tunnel-group command:
tunnel-group x.x.x.x type ipsec-l2l
tunnel-group ipsec-attributes x.x.x.x
pre-shared-key *.
you put the IP peer under the name of tunnel and as you can see, you will write the key in ipsec-attributes sub-mode.
I see straight forward and I think that you will find it easy once you get used to the question of the tunnel-group.
Hope that helps.
Salem.
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I'm relatively new to the security stuff. I'm a guy of the voice. I created a Pix 501 for IPSEC VPN and works very well. Then I tried it setting up PPTP VPN. I use Windows XP to connect. It connects fine, but I can't ping to the inside interface on the PIX. I can do this by using IPSEC. Any ideas? Here is my config:
:
6.3 (3) version PIX
interface ethernet0 car
interface ethernet1 100full
ethernet0 nameif outside security0
nameif ethernet1 inside the security100
activate the password * encrypted
passwd * encrypted
host name *.
domain name *.
fixup protocol dns-length maximum 512
fixup protocol ftp 21
fixup protocol h323 h225 1720
fixup protocol h323 ras 1718-1719
fixup protocol http 80
fixup protocol pptp 1723
fixup protocol rsh 514
fixup protocol rtsp 554
fixup protocol sip 5060
fixup protocol sip udp 5060
fixup protocol 2000 skinny
fixup protocol smtp 25
fixup protocol sqlnet 1521
fixup protocol tftp 69
names of
access-list 101 permit icmp any any echo response
access-list 80 allow ip 10.0.0.0 255.255.255.0 192.168.5.0 255.255.255.0
access-list ip 10.0.0.0 sheep allow 255.255.255.0 192.168.5.0 255.255.255.0
access-list ip 10.0.0.0 sheep allow 255.255.255.0 192.168.6.0 255.255.255.0
pager lines 24
opening of session
emergency logging console
Outside 1500 MTU
Within 1500 MTU
IP address outside of *. *. *. * 255.255.255.0
IP address inside 10.0.0.1 255.255.255.0
alarm action IP verification of information
alarm action attack IP audit
IP local pool pool1 192.168.5.100 - 192.168.5.200
IP local pool pool2 192.168.6.100 - 192.168.6.200
history of PDM activate
ARP timeout 14400
Global 1 interface (outside)
NAT (inside) 0 access-list sheep
NAT (inside) 1 10.0.0.0 255.0.0.0 0 0
Access-group 101 in external interface
Route outside 0.0.0.0 0.0.0.0 *. *. *. * 1
Timeout xlate 03:00
Timeout conn 01:00 half-closed 0:10:00 udp 0: CPP 02:00 0:10:00 01:00 h225
H323 timeout 0:05:00 mgcp 0: sip from 05:00 0:30:00 sip_media 0:02:00
Timeout, uauth 0:05:00 absolute
GANYMEDE + Protocol Ganymede + AAA-server
RADIUS Protocol RADIUS AAA server
AAA-server local LOCAL Protocol
the ssh LOCAL console AAA authentication
No snmp server location
No snmp Server contact
SNMP-Server Community public
No trap to activate snmp Server
enable floodguard
Permitted connection ipsec sysopt
Sysopt connection permit-pptp
Sysopt connection permit-l2tp
Crypto ipsec transform-set high - esp-3des esp-sha-hmac
Crypto ipsec transform-set esp - esp-md5-hmac RIGHT
Crypto dynamic-map cisco 4 strong transform-set - a
Crypto-map dynamic dynmap 10 transform-set RIGHT
Cisco dynamic of the partners-card 20 crypto ipsec isakmp
partner-map interface card crypto outside
card crypto 10 PPTP ipsec-isakmp dynamic dynmap
ISAKMP allows outside
ISAKMP key * address 0.0.0.0 netmask 0.0.0.0
ISAKMP nat-traversal 20
part of pre authentication ISAKMP policy 8
ISAKMP strategy 8 3des encryption
ISAKMP strategy 8 md5 hash
8 2 ISAKMP policy group
ISAKMP life duration strategy 8 the 86400
vpngroup address pool1 pool test
vpngroup default-field lab118 test
vpngroup split tunnel 80 test
vpngroup test 1800 idle time
Telnet timeout 5
SSH 10.0.0.0 255.0.0.0 inside
SSH 192.168.5.0 255.255.255.0 inside
SSH 192.168.6.0 255.255.255.0 inside
SSH timeout 5
management-access inside
Console timeout 0
VPDN PPTP-VPDN-group accept dialin pptp
VPDN group PPTP-VPDN-GROUP ppp authentication chap
VPDN group PPTP-VPDN-GROUP ppp mschap authentication
VPDN group PPTP-VPDN-GROUP ppp encryption mppe auto
VPDN group VPDN GROUP-PPTP client configuration address local pool2
VPDN group VPDN GROUP-PPTP client configuration dns 8.8.8.8
VPDN group VPDN GROUP-PPTP pptp echo 60
VPDN group VPDN GROUP-PPTP client for local authentication
VPDN username bmeade password *.
VPDN allow outside
You will have to connect to an internal system inside and out run the PIX using pptp.
For ssh access the PIX, you will also need additional configuration, see the section on code PIX pre 7.x, section access ssh to the security apparatus .
Concerning
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I was told that the PIX 515E firewall is capable of BLOCKING malicious attacks as attack Dinal of Service. I learned again by CA engineers that it not are a NO product out there that is able to block attacks but rather notify the administrator only. I'd like your opinion on whether the PIX firewall can actually BLOCK attack or not. Thanks in advance.
The PIX has some features to prevent DOS attacks, but he can't block everything. For example, if someone launches an attack smurf or something that uses all of your available bandwidth, then the PIX obviously cannot do anything about it because the damage is already done at the time wherever traffic allows you the PIX.
For something like a TCP SYN attack on a host inside the PIX, then you can configure the static command to allow only a total number of connections through, and/or a number of half-open connections through the internal host, effectively protecting the Server internal. The PIX will refuse further attempts to connect over this limit.
The PIX also has a built-in limited to IDS. It can detect signatures of 59 common packages and can be configured to block these if they are considered. Signatures that he seeks only are based a package signatures, wide as a real IDS device can get nothing.
In short, no one can say yes, "The PIX prevents all attacks back", no box cannot do that, because it depends on what the attack back. If someone is flooding your available circuit bandwidth, you really get your ISP involved to block this traffic BEFORE it happens to you. Yes, host-based DOS attacks, the PIX should be able to block most of them with standard configuration controls.
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I have configured the aaa authentication in the pix firewall to see the ACS RADIUS Server for verification of the user. If the ACS server becomes unavailable, then I could not connet the pix firewall.
In the router, I have the configuration option
AAA authentication login default group Ganymede + local
that tells the router first looking for a radius server and if is not available connect through the local database.
Is there an option in the Cisco pix firewall to connect using local information if ACS is not available?
Thanks in advance
Hello
PIX back up method to entered the unit in the event of server failure aaa works on 6.3.4 code and above. In the codes plus late 6.3.4 If the RADIUS server fails it is impossible to get in unless password recovery. "However if we have not configured for console aaa authentication than user name: pix and password: cisco" works by default.
Kind regards
Mahmoud Singh
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L2l IPSec VPN 3000 and PIX 501
Hello
I have a remote site that has a broadband internet connection and uses a PIX 501. We wanted to connect them with our main office using our VPN 3000 via VPN site-to-site.
I followed the following documentation:
However the L2L session does not appear on the hub when I check the active sessions.
The network diagram, as well as the PIX config and the screenshots of the VPN configuration for the IPSec-L2L tunnel is attached.
Any help or advice are appreciated.
I just noticed that the PIX firewall, the phase 1 paramateres are not configured. You must configure the same PASE 1 and phase 2 settings on both ends of the tunnel.
For example, on CVPN 3000, you have configured settings Phase 1 as 3DES, pre-shared key etc... We have the same configuration on the PIX firewall too.
Here is an example of sample config
I hope this helps!
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Pass the trunk between catalyst and PIX
Hello
Yesterday I had very good response on the forum how to create the VLAN on PIX, I created the subinterfaces and VLAN which their responsibilities. I configured the IP addresses as well. Did the same on the switch of Cat - created SVI and assined their IP add back. Cat shows switch port trunking is correctly but I can't ping from PIX to the switch and vice versa. Help, please.
RVR
Is it possible for you to view the configuration of the PIX? At least the configuration of the interface?
And configuration of the trunk on the switch interface?
Concerning
Farrukh
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Question about 802. 1 q and PIX
I was looking at this document on PIX and 802. 1 q trunking VLAN:
http://www.Cisco.com/univercd/CC/TD/doc/product/iaabu/PIX/pix_sw/v_63/config/bafwcfg.htm#1140519
In this example, there is a server to the VLAN1. The physical interface of the pix is put in the VLAN2 and a virtual interface is created for VLAN3. How would get the server to the VLAN1 to devices in other VLANS in this case? Am I missing something?
-TIA
Hello
I think I understand your confusion. It seems to me that there is an error in Figure 2-9. Guests above the layer of distribution switch should be in 2 VLANS and VLAN 3 rather than 1 VLANS and VLAN 2. As you know, the default VLAN on a Cisco switch is VLAN 1, and we suggest that you do not use the VLAN for anything in a production network. If you change hosts in figure 2 VLANS and VLAN 3, this example has a meaning more? In other words, watch the news and think of it as two separate interfaces. I would like to know if it is not yet clear.
Scott
PS - I'll open a bug to solve this example.
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