Cisco Firewall :: Pix 515E VPN DHCP External / IP-Helper?
May 14, 2012
Cisco PIX Security Appliance Software Version 8.0(2)
Device Manager Version 6.1(5)51
Cisco PIX Security Appliance Software Version 8.0(2)Device Manager Version 6.1(5)51 Running VPN on this device with an internal DHCP Pool tunnel-group JVusergroup type remote-accesstunnel-group JVusergroup general-attributesaddress-pool JVusergroup-DHCP-Pool I would like to use an external DHCP insted of the pix itselvf. How do I relay (IP-helper) DHCP request on the VPN policy to an external DHCP-server?
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May 23, 2011
I have an existing pair of PIX 515E that has two interfaces. One connected to the public internet via my ISP and one internal.
I recently ran out of IP's and had the ISP route an additional block to public IP of my firewall. This isn't working for some reason and I'm trying to figure out why.
The "ip address outside XXX" command defines the outside address and I don't see any way to add a secondary sub net.
I tried just adding a rule to the firewall for one of the IP's in the new subnet, but I can't seem to get traffic to pass though the device.
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May 6, 2011
I have a PIX 515E that I want to use to as a border between my internet connection and my Cisco AIR1131AG. I have configured the PIX to have the outside interface as a dhcp client which gets its dynamic IP address from the cable modem. the AP is connected to the E1 inside interface. Now I could see the E1 interface from the arp table from the AP but I cannot ping it. From the firewall I don't see the ARP table from the firewall. and i cannot ping the AP. what is wrong with the configuration? side note, i am able to connect to the AIR1131AG from my laptop I was not able to retrieve an IP address.
FW1 - CONFIGURATION
interface Ethernet0 description uplink towards the techsavvy modem speed 100 nameif outside security-level 0 ip address dhcp setroute !interface Ethernet1 description >>> WIFI LAN ACCESS <<< nameif inside security-level 100 ip address 10.0.0.1 255.255.255.0
[Code].....
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Jun 12, 2013
I've a Cisco 1941W router which is DHCP server for data-VLANs and uses ip-helper for voice-VLANs. [code] I don't know why I can't have IP from wireless voice VLAN whereas it is OK and wired voice VLAN and conf is the same!
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Dec 15, 2012
Setting up a stand-alone WDS/PXE server.Current we have helper addresses setup to forward the DHCP requests from the different VLAN's to the DHCP server. The WDS/PXE server we are setting up is on its server. How do we craft the helper addresses so DHCP requests go to the proper server hosting DHCP and PXE requests go the WDS server?
Everything I seen on Microsoft Technet, lists using Helper Address as the recommended way, but assume both services are on the same server. Our helper address is as follows on each VLAN interface in router: ip helper-address X.X.X..This is a Cisco 3750.
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Feb 22, 2013
Version 12.2(33)SXI
int vlan 1
description client vlan
ip vrf forwarding A
ip address 10.1.1.1 255.255.255.0
standby 129 ip 10.1.1.2
standby 129 timers 1 4
standby 129 priority 105
standby 129 preempt
ip helper-address 10.1.2.20
[code]....
dhcp requests are not making it to the dhcp server SAME VRF (ip helper-addres is not doing anything.....)extended vrf traceroutes on udp 67 sourced from vlan2 are fine
I am expecting udp unicast packets on port 67 "giaddr" relay packets on the DHCP server generated and sourced by the relay on Vlan1
eg. Mar 1 01:59:06.731: DHCPD: setting giaddr to 10.1.1.1
This exact setup works in our preprod environment with the same code.Only difference is we run Distributed etherchannel on the 6500's where this doesnt work.
Wireshark on the client I can see the requests being sent Going to check it with debug ip dhcp server to check the relay logs out of production hours.
I have seen so many people say it IS and ISN'T supported on this version of the code.e.g. [URL]
I am aware the helper-adddress should inherit the vrf of the interface ip helper-address vrf command is not supported.The fact it works in the PP environment.... could this be due to the Distributed EtherChanel difference? or just some bug....
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Jan 5, 2012
My actual Scenario
1 x 4500 and 1 x 3560?They are gateways of 8 Vlans?They are doing HSRP in each of those Vlans?The 4500 is the Active?There is a DHCP Pool for each of those Vlans on both gateways using "ip dhcp excluded-address" I ensured that the range of provided ips by each DHCP server will not be overlapped Obs.: Reducing the lease time, I ended with the calls bringing related problems.
OK, every thing is blue, every thing is fine.But the network diagram is realy complex(41 switchs, 89 uplinks), and depending of how is the network flow, one or other server answer first or latter.
For many reasons I would like that the secondary DHCP server would answer only if the primary DHCP server goes down.To me, the bigger reason is that DHCP database would be only in one DHCP server.But there is other reasons.
I passed by many frustrated solutions:Try to force a delay on the answer on one of the servers. - Impossible.Try to disable DHCP server, and, using EEM, enable it only if router became active in HSRP. - I couldn't do It.
What I'm thinking now is use the HSRP resource to resolve it.On both routers I would put a "ip helper-address" pointing to an Virtual_HSRP_IP.And depending on which router is the active, him will answer the request.
My first doubt is:Would it work?The second doubt is:Could I use the same Virtual_HSRP_IP that exists on that Vlan(see example 1),or I would need to point it to a Virtual_HSRP_IP in a different Vlan(see example 2)?
Example 1
-----------------------------------
| 4500 |
-----------------------------------
interface Vlan1
ip address 10.10.0.2 255.255.0.0
ip helper-address 10.10.0.1
standby 1 ip 10.10.0.1
[code]....
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Aug 22, 2011
I need to redo the configuration on the new one?
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Jun 13, 2012
I have an Pix 515E firewall with Pix724-33.bin IOS. I just want to know that does this IOS support SNMPV3 or I will have to upgarde it with some other version.
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Jan 16, 2013
Ive got a problem with passing traffic through a Cisco 515e firewall.im trying to telnet to devices on the inside net, 172.16.x.x fom an outside net 10.x.x.x? ive configured a group called infrastructure and added the 10.x.x.x addresses.ive configured acl 101 inbound on the outside interface:
access-list 101 permit tcp object-group INFRASTRUCTURE any eq telnet
theres a route to the inside net:
inside 172.16.0.0 255.255.0.0 172.16.163.1
and theres a translation:
static (inside,outside) 10.4.4.34 10.4.4.34 netmask 255.255.255.255
when i try and connect, using a packet capture I can see traffic from 10.4.4.34 to the inside device 172.x.x.x on the inside interface but i cant see the traffic leave the outside interface ive used the same group infrastructure group before to connect to VM machines on the 172.x.x.x net on RDP and this wrks ok. access-list 101 permit tcp object-group INFRASTRUCTURE object-group VMs eq 3389
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Nov 25, 2012
I am trying to set the PIX firewall to transparent mode.After I set it to transparent firewall, I allowed all icmp, tcp, udp traffics.Currently, any devices in the inside network can get the ip automatically from DHCP server in the outside network but cannot ping to any servers in the outside network either access the internet.Do I need additional confiration on the firewall?
Here's the configuration:
PIX Version 7.0(1)
firewall transparent
names
!
interface Ethernet0
[Code]....
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Apr 20, 2012
I have Cisco router RV082 and I need to set up in this way. There should be two sunb nets.. each should have it´s own DHCP and each sub net should work in different external IP.. (one Internet port a and second DMZ/internet port)
Is it possible to set up?
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Nov 25, 2012
I am wondering if the folowing is a valid configuration:
WLC2504
AP2600
I need 3 SSID/VLAN, 1 for corporate devices, 1 for coporate smartphones, 1 for guest.
Port 1 on the 2504 should be used for management and corporate devices and connect to the corp network. Port 2 is for smartphones/guest and will be connected to a Cisco ASA 5515 that is connected to a second ISP.
Corp devices should get IP from an Windows DHCP. Smartphones/guest should get IP from the WLC. Is this possilbe? I read this in a document "To use the WLC as a dhcp, you need to enable DHCP proxy as it is required." Some how I am imagining that this will mess with the Windows DHCP. Is it better to use the ASA as DHCP for smartphones/guest?
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May 20, 2013
I have Pix firewall 515e on inside interface its has configured with IP 192.168.0.254.And Global Nating is configured.
global (outside) 1 interface
nat (inside) 1 192.168.0.0 255.255.255.0 0 0
I want i configured Global nating only for only specific IP address E.g 192.168.0.0-192.168.0.30 and 192.168.0.200-192.168.0.254?How i do this?
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Jan 16, 2013
I have a 4402 (version 7.0.235) working with 10 units of 1121 APs connected to it. The WLC is not configured to work in LAG mode. Physical portt #1 is connected to the Main Switch (trunk). I have 3 WLAN mapped to 3 Different VLAN and Everything (security and internal, external DHCP) is working swell...Now- I have connected Physical port #2 directly to an ADSL Router (giga port), Configured Port 2 as untaggedwith the proper IP details.I have configured this interface to receive DHCP from the ADSL Router and for some reason, Clients are not getting addresses.When I assign a Static address to my laptop I get internet access and all is nice. I tried configuring The WLC internal DHCP server (instead of the ADSL router) and that didn't work. It seems like a DHCP problem but I dont understand the source of the problem of think of the solution.When turning off the proxy settings I noticed that it worked. Is there anything to do with that? The problem was that after a while the other WLANs starting causing DHCP issues as well.
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Oct 6, 2012
I have the following network.2 WAN links termination on my PIX 515e and all internal users connected to third interface.
Problem I am facing is that I have assign manual IP to users with some have full access to Internet while others have limited.
The users are changing their IP address while others are offline and I want to restrict them.
The only way I can think off is by binding IP to MAC as e.g ( Active wall software). But can it be done on PIX 515e and if so how?
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May 13, 2012
I have erased the Cisco image from my PIX 515E, and while i tried to load a new image its asking for activation key. I tried its old key. but no use.
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Sep 5, 2012
I have a PIX 515 Ewhich does authentication for SSH via RADIUS protocol and fails over to the local database if radius server goes offline. But when the radius server comes back online, authentication still takes place through LOCAL and not the radius server. Following are the commands:
aaa-server RADIUS protocol radius
aaa-server RADIUS max-failed-attempts 3
aaa-server RADIUS deadtime 10
[Code].....
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Dec 15, 2011
\I just configure my PIX 515E with version 7.0(4) and having problems to get traffic out on eth0 (if name outside). There is no problems between different VLAN ,all VLANs are configure on eth1. It is also possible to accass services on VLAN 10 (DMZ) from outside. The only thing I see in syslog is "Built Outbound" and "Teardown".
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Dec 30, 2011
I have a Pix 515E running PixOS version 8.0.4 with two interfaces, inside and outside.On the inside interface, I have a Redhat Enterprise Linux 5.4 64 bits machine as an NFS server version 4 (NFSv4).On the outside interface, I have three (3) Redhat Enterprise Linux 5.4 64 bits as NFS clients.I am looking for the exact UDP and TCP ports to be added to the ACL in order to accomplish
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May 15, 2012
I need ot upgrade a Cisco PIX 515 E to A Cisco ASA (not sure what type and modle yet!). the PIX currently has about 80 lines of ACLs and no VPNs. So only inside and outside interfaces and 80 lines of ACLs to be transferred over to the ASA.I was wondering if the ACLs can be transferred over to ASA as is?is there anything that I need ot watch for?
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Jun 30, 2011
I have an issue in the Cisco PIx 515e series. The IOS is 6.1(2).I have set sepecific access-list to allow incoming traffic to inside interface. But still the TCP 3-way handshaking is dropped here. [code]
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Oct 22, 2012
What would be the access-list entry to allow protocol 97? I am setting up foreign-anchor controller and need to allow protocol 97.
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Dec 3, 2012
how to storage the DHCP IP table in a external flash of a router. This is because the router is switched off and switched on everyday but I want that it remembers which MAC is associated with which IP when it starts again and avoid IP duplicate problems. The command "lease" doesn't seem useful here.
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Oct 2, 2012
We just switched over from a T1 line to 50/4 Mbps cable Internet. The speed was fine with the T1, but when we switched over to cable, the download speeds didn't increase. I'm getting 2-3 Mbps up and still only 1.5 Mbps down. I inherited this network a few years ago, so I didn't configure the Pix initially but I have been managing it and can't find a setting limiting the bandwidth for the liffe of me. I know it's not the Internet because when I connect a computer straight to the modem, the speed is great. As soon as I put it through the Pix though, it slows way down.
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Nov 30, 2011
I'm trying to use port redirection to allow outside access to a internal web server. As far as I can see, everything is configured properly. The Open Port Checker tool from yougotsingle.com says that the port (80) is open. However when I goto access it the connection times out. The external address is static from my ISP, and I will call it xxx.xxx.xxx.xxx. The server is at 10.1.1.20, and is functioning properly over the LAN.
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Mar 29, 2011
I have Cisco PIX 515E for my Lab and can't recover the password. It is not connected to the network. I have configured server, address, gateway from the monitor mode and tftp not seeing my laptop. best way to reset or recover password.
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May 21, 2012
I've been struggling to get ASDM (PDM) installed and running on my PIX 515e. The PIX IOS version is 7.2.4(30) The ASDM version I've copied to flash is 524.
I've followed the Cisco documentation verbatim, however I still cannot connect via the Java ASDM client or via http. When I try to connect via http, my PIX shows the following error: "tcp access denied by acl from..." I do not this this is a security (ACL) issue as I've tested after opening everything up and still no luck.
Here's my running config (w/ the relevant statements prepended with ">>>"):
show run
: Saved
:
[Code]....
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Sep 18, 2011
I have the following Pix 515E Firewall, that has been working good for a few years. But suddenly, the Pix stop booting up. The only thing that is happening is the power and network traffic led flashes and the active led is off. So my question is that is this symptom a hardware or software problem and is it fixable with either new parts; or is my firewall dead. I suspect that it is a hardware problem since the active led doesn't light up. I cann't even enter the ROM Moniter mode.
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Feb 16, 2012
What would be the command to clear the df-bit on a PIX-515e running 6.3? I have tried the following:
conf t crypto ipsec df-bit clear-df inside and it doesn't take it.
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Aug 9, 2012
I am facing high CPU util on my pix 515 E which is in failover mode.During peak hours the util is see rising to 60% where as in off peak hours it is normally12%.
During normal operation the average utilisation was observed to be 30% but suddenly from 2/3 days it is constantly 60% doule the value as earlier. Have gone through the logs and traffic but not able to tarce anything particular
below is the o/p of some command taken for analysis
IOS version 8.0(4)
sh cpu usage
CPU utilization for 5 seconds = 51%; 1 minute: 61%; 5 minutes: 58%
sh cpu usage
[Code]......
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Jul 26, 2011
I need to create a DMZ zone in my network. One server need to be put in DMZ. I have a PIX 515E 6.3.3. It has free port to create DMZ.
1) Put a new switch for DMZ zone
2) Connect it to the DMZ port
3) Create a NAT for inside to DMZ with same IP as inside
4) Create ACL for permiting traffic to DMZ and apply it to outside interface
5) Create ACl for permitting traffic from DMZ to inside
6) Routing for DMZ in PIX
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Aug 26, 2012
Looking at migrating from the following:
PIX-515EPIX Security Appliance Software Version 8.0(4)Device Manager Version 6.1(5)51
to
ASA5515Cisco Adaptive Security Appliance Software Version 8.6(1)Device Manager Version 6.6(1)
Is this migration directly supported, or do I need to downgrade first?
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