Cisco Firewall :: ASA 5520 - Allow Traffic Between DMZ Servers?

Dec 20, 2011

We can´t reach DMZ servers from other DMZ servers?If I make a ping from DMZ server to another, sometimes only recieve one ping, sometimes 4, sometimes 0.How can I allow the traffic between DMZ servers??
 
(ASA 5520 Version 8.4)

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Cisco Firewall :: Mask DMZ Servers From Private Servers And LAN ASA 5520

Jun 11, 2013

We are planning to split the Private servers from the DMZ Servers and configure an additional Interface and segment for this purpose.
 
Private Servers Segment: 192.168.4.0/24 (there is no DHCP all servers' IPs are statically configured)
DMZ Segment: 192.168.3.0/24 (This is a future deployment)
LAN Segment: 172.17.0.0/16
 
Both, Private Servers and DMZ Servers are in a collocation as well as the ASA5520. There are multiple Branch offices that uses subnets within the 172.17.0.0/16 Network and they are connected to the ASA5520 via Metro-E.
 
I do not know if this is possible but what I want to do is this:
 
In order to avoid the change of internal DNS records I want to mask the DMZ servers with a Private Server IP when a Private server or LAN host wants to access it like this:
 
The FTP server in the DMZ has the IP address: 192.168.3.100. But when a PC from the LAN wants to reach the FTP server it should points to its old IP: 192.168.4.100. This way the PC sends a packet to the ftp.corporate.net (192.168.4.100) the ASA recieves the packet and translate it to the (192.168.3.100) and send it out through the DMZ Interface.
 
Also if the Private Servers wants to reach the same FTP the ASA will act like a proxy-ARP and send the paquet to the DMZ by means of the translation of the IP.

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Cisco Firewall :: ASA 5520 - Allow Traffic From DMZ To Internet And Block Traffic?

Apr 29, 2012

I have an ASA 5520 with the below config
 
Gi0/0: outside (Internet)
Gi0/1: inside (Internal users)
Gi0/2: DMZ (web servers, ftp, Mail etc..)
 
I have a SMTP relay deployed on the DMZ for mailing. I have also a mail servers installed in the internal lan,
 
I want to allow trafic from dmz to reach internal lan, and i want normally also allow stmp relay from dmz to reach Internet.
 
How can i block trafic from DMZ to reach Internal Lan (instead of smtp) if the to allow trafic from dmz to internet i must put ANY in the policy?
 
For allowing trafic from DMZ to reach Internet, the policy must be DMZ -----> ANY ----->Services., this policy means DMZ can implicity reach Internal Lan?

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Cisco Firewall :: No Traffic To Public Servers PIX 515

Jun 8, 2011

Upgrading from a PIX 515 ,V6.2, I can get internet traffic out through the ASA , but no traffic in to the servers. The NATS are the same on the old firewall. The routers outside the firewalls are doing further natting from the .253 netwrok to a publilc address. No changes have taken place on the routers. [code]

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Cisco Firewall :: ASA 5510 - Get Traffic Through Box To 4 Dedicated Servers

Apr 17, 2013

Recently moved into the hardware firewall space and have a ASA 5510. Having some issues trying to get traffic through the box to my 4 dedicated servers. all the servers have static IP's and are connected to a private switch into one of the ethernet ports on the firewall(0/2). Public internet connection into another(0/0). 1 of my servers has a connection to the management port, and the public switch, and this is the one im trying to do the configuration on.
 
Im unsure what to set the IP address of my "outside" interface as. need to have RDP,FTP, HTTP traffic going to each of the 4 servers independently, pretty sure i can get the rules in place to allow this, but cant seem to get any traffic to go through the firewall to any of the other 3 servers.

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Cisco Firewall :: Frequents Disconnection When Connecting To Servers Behind ASA 5520?

Sep 18, 2011

Since several weeks ago we are triyng to solve a disconnection problem related to servers benind an ASA 5520 behind this ASA there are:

-subnet  with public ip addres

-sunbet with prive ip address, the server on this subnet are acccesible via NAT.the problem is worst when some ousite our  network and behind a nat device (like a adsl modem/router) tries to connect to those servers wich are using natted ip   behind the ASA.I tried from my home to connect to this ASA5520 using annyconnect  and get reset tcp packets. Are there some aditional configuration to make the ASA work properly?. We have other firewalls like PIX or software firewall (ASG), they work with no problem. Only the ASA 5520 has this issue.

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Cisco Firewall :: ASA5505 - Blocking Internal Traffic Between 2 Servers

Oct 25, 2012

I have a cisco ASA5505, it runs a wide site to site VPN network and has 4 servers connected to it
 
10.50.15.4 > fileserver
10.50.15.5 > domain controller (exchange)
10.50.15.6 > terminal server
10.50.15.7 > terminal server
 
Now yesterday i removed 10.50.15.6 and replaced it with a new terminal server with the same ip address, ever since the ASA is blocking traffic between it and the domain controller (example)
 
2Oct 27 201214:51:0510600710.50.15.655978DNSDeny inbound UDP from 10.50.15.6/55978 to 10.50.15.5/53 due to DNS Query What has me baffled is the only thing different between today and yesterday is the new server is windows server 2008 and the old one was windows server 2003. The new server has the same LAN ip address as the old one to make the changeover seamless for the users.
 
why all the sudden my ASA has decided to block the traffic between those machines? all the other machines can talk to it fine just not the domain controller, and seeing that this is a terminal server naturally you can see the problem i face!
 
this router has worked flawlessly for 2 years now without any config changes and i cant work out why its blocking traffic between those 2 machines.

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Cisco Firewall :: ASA 5520 / Cannot Ping External Servers Like Yahoo Or Sony

Jun 14, 2011

I have installed quite recently a cisco ASA 5520 replacing a linux based firewall I have only 2 zones ..one is internal netowrk and other external the internal network has web servers, dns and mail server all having public IPs Every thing is OK but i have seen that if I try to ping an external server for example [URL] i cannot ping says
 
[sylvan@kmdns1 ~]$ ping www.yahoo.com
PING eu-fp.wa1.b.yahoo.com (87.248.112.181) 56(84) bytes of data. 
--- eu-fp.wa1.b.yahoo.com ping statistics ---
6 packets transmitted, 0 received, 100% packet loss, time 5010ms
 
but I can ping  from systems which are outside my firewall perfectly with the linux firewall i had before i could ping perfectly to yahoo from any of my internal servers?

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Cisco Firewall :: ASA 5520 - VPN Traffic Is Getting Dropped Through Firewall

Apr 8, 2011

Our Local Network is behind the CISCO ASA Firewall.Whenever we are accessing to Client VPN server,it is getting connected but after few Minutes (May be 5/10/30 Min),the sessions are terminating. The same traffic through PIX is no issue , only with ASA Firewall. See the following Error and request you give the possible root cause for this.
 
2011-04-09 16:15:09    Local4.Info    172.16.1.68    %ASA-6-302016: Tear down UDP connection 87447908 for OUTSIDE:68.22.26.66/4500 to inside:172.16.9.10/4410 duration 0:27:49 bytes 18653

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Cisco Firewall :: ASA 5510 Stops Forwarding Incoming Traffic To Internal Servers?

Dec 5, 2012

Since the power failure two days ago, my -ASA stops forwarding traffic to internal servers, for no apparent reason. Packet trace shows all OK, packet capture buffer stays empty when I try to http into the mail server. The only way to get it working is to change the Outside Ip to the one used for mail, then to change it back. It will work OK for a few hours, then stop, with nothing obvious in the logs.

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Cisco Firewall :: ASA 5520 VPN Tunnel Up But Not Traffic

Nov 1, 2012

We just migrated from a single 5510 to a dual (failover)  5520, It seems that everything is working except the remote VPN. We can establish a tunnel and authenticate as local users, (going to LDAP when all is working) but no traffic is passing. I know I am overlooking something but cant see it. [code]

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Cisco Firewall :: 5520 VPN Traffic Between Interfaces

Jun 12, 2011

Our ASA 5520 firewall is running 8.0(4) IOS.I have an internal L2L VPN terminating on my firewall (from an internal remote site) on ENG interface.With the default "sysopt connection permit-vpn" command enabled, VPN traffic is allowed to bypass the ENG interface acl.The security level on the ENG interface is set at 50.The security level on the destination interface PRODUCTION is set at 40.Inbound VPN traffic bypasses ENG interface acl and since higher-to-lower security level allows VPN traffic to flow freely from ENG to PRODUCTION, it seems the only place to check/filter VPN traffic is an ACL placed on the PRODCTTION interface and set at INBOUND (outbound VPN traffic).

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Cisco Firewall :: Traffic Prioritization On ASA 5520?

Dec 1, 2011

I have a Cisco ASA 5520 (8.0) and I'm trying to figure out how to prioritize traffic to specific websites (by either domain names or IP addresses/ranges).  This document [URL] has some great examples, but I'm not able to create a class-map that will match addresses.  I'm not doing any other traffic manipulation on this ASA. 

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Cisco Firewall :: 5520 - Traffic From Inside To Outside

Mar 2, 2011

I am setting up a pair of 5520 in A/S mode but the traffic from inside to outside seems blocked somehow.

asa01# sh run : Saved
ASA Version 8.3(1)
host name asa01
enable password LFJ8dTG1HExu/pWQ encrypted
password 2KFQnbNIdI.2KYOU encrypted
names
[code]......

Base on the above configuration, I still cannot ping or HTTP.

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Cisco Firewall :: ASA 5520 8.3 VPN Tunnel Drops Traffic

Aug 23, 2011

We have a 100 Mbps WAN circuit, we have configured an IPsec tunnel between ASA 5520 and Cisco 3845 Router for our DR site replication via Veeam Backup and Replication, it was working fine before, when we established the 3DES tunnel the traffic for certain subnets is dropped after an hour and it stops the replication, although tunnel remains up and we can access the other subnets, as soon as we clear the crypto SA and ISAKMP sessions on the firewall the traffic starts flowing again and then after an hour the traffic is dropped again.So far the testing and differnet configurations we tried are as under.
 
Tried with a different MTU size both on firewall and ESXi servers but nothing happened.Their is no QOS configuration.Checked the utilization on both ends its Noram although their are subsequent 100% spikes on Cisco 3845 but on average it remians at 30-40%.

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Cisco Firewall :: ASA 5520 Cannot Block Incoming Traffic

Dec 12, 2012

I was configure 3 interface on ASA1st - managemetn (only for management)2nd - gig0/0 is connected to internet with real IP3rd - gig0/1 is connected to local networkI was configure routed NAT to internet.But I have problem with restriction incomming traffic to inside interface (ifname is inside)but I can connect to ip address of inside interface from other ip. It is wrong and i can't understand where is my mistake.

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Cisco VPN :: 5520 - How Much Traffic Pass Through Into IPSec In ASA Firewall

Mar 20, 2013

How can I see the quantity of traffic that is passing through into an IPSec VPN in a ASA 5520.

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Cisco Firewall :: 5520 Can't Get Traffic From Inside To Internet

Nov 27, 2011

I am trying to make a basic config on my 5520. The first goal is to make trafic from inside to outside.The internet address is 64.28.29.200 and the default internet gw is 64.28.20.193What am I missing since I can not get trafic from inside to the internet? [code]

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Cisco Firewall :: Enabling Outbound Traffic Through ASA 5520 8.4(4)1

Apr 4, 2013

We've got a proyect that requires a few thin clients to connect to a remote PCoIP server.
 
Looking to the documentation, the only port required to be open through Firewalls is TCP/UDP 4172, however, we've seen (making interface captures) that it somehow also uses ESP (IP protocol 50).
 
We've got a static NAT translation translating those thin clients to a public IP address, we've created ACLs to allow inbound (shouldn't be necessary as our user is connecting to a remote server) and outbound traffic for TCP/UDP 4172 and ESP and I cannot make it work.
 
I've also enabled IPSec pass-through Inspection to no avail.
 
how should we configure our ASA to enable this kind of traffic?

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Cisco Firewall :: ASA 5520 - Allow All Traffic From Frame Relay

Jun 14, 2012

I am installing an ASA 5520 and I have a problem on accepring the incoming traffic from an external office connected via Frame Relay.
 
On my OUTSIDE interface I have both the internet traffic and the external office traffic incoming. What comes from the external office is visible as 10.1.0.0/16.
 
I have to allow this traffic to enter the internal network, without any control. I would also keep the original IP address.
 
I have configured the Firewall but I don't know how to setup the NAT.

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Cisco Firewall :: ASA 5520 8.2(1) - Botnet Traffic Filter?

Jun 28, 2011

When I try to configure the Botnet Traffic filter with the commad "dynamic-filter use database" through the ASDM I get the following error message.
 
[ERROR] dynamic-filter use-database  Dynamic Filter: New data file not terminated with newline

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Cisco Firewall :: 5520 To Pass Traffic Through Ssm 20 And To Create Sensors

Jun 20, 2011

I have installed asa 5520 , software ver is 8.4,I have SSM-20 installed in asa 5520. How to pass traffic through this ssm-20 ,how to create sensors,how to update signatures of this IPS module ,is there any procedure to automatically update the signatures .

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Cisco Firewall :: ASA 5520 - Permit Traffic To Inside Via MAC - Address?

Apr 6, 2011

I have a handheld device that will be used for inventory outside of our office. It has 3g capabilities. Is there anyway I can permit traffic from this device from the outside world coming into my network?  I need to open a couple of ports so it can hit the server. But I have no intention to open these ports up to the entire world.  I use an ASA 5520 with a managed router from our provider. I looked around on the Cisco site and the only information I found was for permitting and denying traffic from devices that are within the network.

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Cisco Firewall :: Command To Check ASA 5520 Is Passing Traffic

May 14, 2012

how can i check that ASA is passing traffic? Also what command we can use to make sure VPN is working fine.

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Cisco Firewall :: ASA 5520 - Traffic From DMZ And WAN Forwarded To Object Production

Sep 26, 2011

i have an ASA 5520 8.4(1) with following config
 
interface GigabitEthernet0/0
nameif WAN
security-level 0
ip address 216.52.185.33 255.255.255.240 standby 216.52.185.34
!

i need traffic (port 9350) from DMZ and WAN forwarded to object Production_23 port 3389, how do i achieve this ?

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Cisco Firewall :: Traffic Shaping Per Users / Ip / Application Using ASA 5520

Apr 5, 2011

I hava Cisco ASA 5520 with AIP-SSM module. I would like to have the below features with ASA installed in Transparent mode.
 
1. Traffic shapping per user
 
2.  Traffic shapping per IP subnet
 
3.  Traffic shapping per Application
 
Is it possible with ASA installed in Transparent mode?

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Cisco Firewall :: ASA 5520 Inbound Traffic On Backup ISP Connection

Nov 3, 2011

I have a client that has an ASA 5520 that has two internet connections, FIOS and Comcast.  The ASA is configured to failover from the FIOS to the Comcast if the FIOS fails.  This works perfectly fine.  However, I was wondering if VPN and other inbound traffic will come into the secondary connection when it is active.  I think VPN will work inbound when the FIOS connection fails, but I am not sure about the other inbound connections. 

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Cisco Firewall :: Force ASA 5520 Traffic Out Specific Interface

Jun 1, 2011

I'm trying to route all default traffic from my production environment through my ASA 5520 on the "outside2" interface.The 5520 has a site to site VPN to our DR site on the "outside/inside" interfaces via one ISP. On another ISP, interfaces "outside2/inside2" go to the internet.
When I make my 3750 stack default route for the inside2 interface IP I cannot get to the internet. When it is pointed to the inside interface on my 5505, I can.
 
I get the following errors when I try to open google.com from a production server:Why is the 5520 trying to use the "outside" interface instead of the "outside2" interface to go out?

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Cisco Firewall :: 5520 / 4510 - ASA Is Blocking For Returning Traffic

Apr 2, 2012

My internet link is connected on Internet Router & below downwards Cisco ASA 5520 is connected.ASA is connected with core switch cisco 4510 on downwards. our web based mail [URL] is hosted outside.

Lets suppose ISP pool is 4.4.4.0/28.suppose owa server is Static natted on ASA with 4.4.4.4. my machine traffic is going to internet with same ISP with PAT on Cisco ASA & internet is working on my machine. if i want to access {URL} or ip base for mail access, its not working & also it is not pinging. i suppose to ASA is blocking for returning traffic.
 
is there any way to traffic will go via same Firewall & comeback on same firewall port?

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Cisco Firewall :: ASA 5520 Netflow Traffic Delayed To Solarwinds

Dec 5, 2012

I am currently testing Netflow accuracy on my Solarwinds platform. So I have been transferring a large file across an ASA 5520, which is set up to send Netflow data to out Solarwinds server.
 
The problem is that the Netflow data does not show up on Solarwinds for about 2.5 hours. Once it gets there the size is correct, but the time stamp on Solarwinds is 2.5 hours behind when the transfer happened. For routers it is showing up within a few minutes. 
 
ASA is running 8.2(5) and Solarwinds NTA 3.9.0. Firewall and Solarwinds times / timezones are the same.

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Cisco Firewall :: After Upgrading ASA 5520 To 8.4.2-8 VPN Clients Traffic Not Passing Destinations?

Dec 26, 2011

after upgrading an ASA 5520 to 8.4.2-8 VPN clients traffic is not passing destinations other then destinations behind the inside interface. the log shows routing failure for the vpn client on the inside interface.it was working fine with 8.4.1 but the traffic is originated from the outside interface. confirm the the interface for VPN clients changed from outside to the inside interface.

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Cisco Firewall :: Redirect Http And Https Traffic From ASA 5520 Via Squid?

Dec 20, 2010

Right now, in my network there is no proxy server and all users go straight through the ASA to access internet. I would like to put a squid with dansguardian (for web filtering). Steps in getting all http and https traffic from ASA go via my squid?

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Cisco Firewall :: Can The ASA 5520 Do Traffic Shaping Or Policy Map Just Like In A Normal Router

Feb 13, 2011

ASA 5520 can handle 2 ISP? not to load balance or not standby/active but to use the 2 ISP at the same time and separately. for example, ISP_A who has 10m will be dedicated to the customer A/VLAN A, then ISP_B who has 4m will be for the rest of the customer's traffic. Can the ASA 5520 do traffic shaping or policy map just like in a normal router?

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