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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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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Apr 12, 2012
I have an issue where our ASA 5520 is impacting upload (from LAN to internet) speed. We have a 100Mbps SDSL internet link and only see around 45-50 Mbps on the upload when going via the firewall, download is around 90+ Mbps so that is acceptable. I have tested a laptop connected directly to the internet router and that give near on the 100Mbps up and down speeds, but if I put that laptop on the LAN or directly onto the firewall interface I only see 90Mbps down and 45Mbps up. I have check that the interface speeds/duplex on the firewall, switch and laptop are correct and also checked there are no errors on the ports. I also turned off the IPS and that made no difference. In addition I have checked the CPU during download/upload (max): CPU utilization for 5 seconds = 9%; 1 minute: 3%; 5 minutes: 1%
In theory the 5520 should be able to cope with this throughput:
Cisco ASA 5500 Series Model/License: 5520
Maximum firewall throughput (Mbps): 450 Mbps
Maximum firewall connections: 280,000
[Code].....
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Jan 15, 2012
I have a site to site tunnel between two 5520 ASAs. Tunnel is up but when I try to talk to the other side, the implicit deny on the inside interface of the local ASA blocks the traffic. When I ping, the tunnel comes up but in the logs it says it is blocking icmp from inside to outside. I have tried the sys opt connection permit-vpn but it is not working. The traffic is from 5 specific machines within the local sub net that I put in a network object group called Celerra_Replication.
I want to them to be able to talk to 5 machines on the far end of the tunnel in a seperate sub net. They are in a net wrok object group called GP_Celerra_Replication The ACLs I created for this appear to be created correctly allowing IP from Celerra_replication to GP_Celerra_Replication and the opposite on the other side.
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May 3, 2011
We have 2 FWSM modules in each 6500 switches. 1st module is having 04 firewall vlan groups with 18 vlan interfaces in a single context firewall. All are working fine with no issues. Recently we create one more vlan on MFSC and add into the same firewall module. However newly created vlan inside the FW is not able to communicate with outside and also outside users not able to reach newly created subnet. But within the firewall zones (other interfaces) it can communicate. Once we did packet capture we noticed that its hitting firewall outside interface only and when we ping we got TTL expired error. we have default routes to outside and there's no any route inside as new segment is within the firewall (no any hop).
I guess there's no limitation on number of vlans that we can assign on one firewall eventhough there is a limitation for number of vlan-group which is 16 max (but we are within that limit).
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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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Dec 20, 2011
FTP traffic routed from outside to the inside interface works fine. I have another interface with multiple sub-interfaces and vlans configured. FTP traffic routed from the outside to vlan2_servers is not making it through the firewall. I must be missing something. I have attached my config.
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Jun 15, 2011
We are trying to get a video conference system (POLYCOM) up running. Thrue a Cisco 1812 router with Firewall feature set.
I Have heard in the past that there should be issues with Polycom and Cisco, but have actually never seen it.I can establish a video call from inside the 1812 to outside.
But when I try from outside to the public ip adress there is nattet to, then it reach the video system and die straight after, so there is never any video session set up.
I have tried to remove everything regarding firewall feature and passing true, so the only thing the 1812 should do is NAT. And still the same.
I can not see anything in the log on the router from the ACL's where I permittet everything, other then it connect on the port TCP 1720, as it should. This is the software I'm running on the router:
Cisco IOS Software, C181X Software (C181X-ADVIPSERVICESK9-M), Version 12.4(15)T3, RELEASE SOFTWARE (fc1)
When I search Google, it look like there is a lot issues with Cisco and Polycom, but I have not found any concret solution. Other then I should use a ADSL line with a public IP address. As we probably is going to do.
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Sep 20, 2012
So I was doing some testing with my BB Playbook where I wanted to see what outside connections it tried to make during startup and whatnot. I have a pix 506e running 6.3(5). I created an simple 'deny ip any any' access list on the inside interface so that the Playbook doesn't actually make any connections, but I set up a 'capture' on the inside interface accepting 'ip any any' to see what kind of traffic I could see heading outbound from the Playbook. Well, it started off showing attempts to query DNS (and failed, naturally), but then after a couple of minutes, it tried to connect to a couple of IPs over port 443 and actually got a response!!! For the life of me, I can't figure out how this can happen. NO traffic should be allowed outbound due to my explicit 'deny' rule, but for some reason some traffic on port 443 made it past the firewall and got a response back. There are no other rules in the access list except the 'deny' rule. My PIX configuration is quite simple and I cannot see anything that would allow the Playbook traffic to circumvent the access list.
I've come to think that either RIM has found away around Cisco access-lists, or there is a bug in the Pix OS. I know it's an old appliance/OS, but still. I wouldn't think it could be THAT easy to bypass the firewall.
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Apr 18, 2013
I am trying to determine why Comcast Business Class modem configured with a static IP (IPV4) works with a laptop or Linksys Cable modem but not with a Cisco ASA 5505. After a few minutes, the 5505 stop passing web traffic. I am able to ping the default gateway even though I can not surf the web. Restarting the 5505 and the Comcast modem, web traffic flows for a short period of time, then stops. I can connect inside the firewall via ASDM 7.1.1 and via SSH. I can not connect via either from the outside. Comcast tech support indicated their router is working and is configured in bridge mode. I swapped out the 5505's memory, and then with another 5505. Nothing seems to resolve the issue. I am trying to determine if the 5505 or the Comcast router is not configured correctly.
Here are the parameters: The 5505 was reset to default factory settings via the command: config factory-default. Configured the outside interface with static IP Address followed by the no shutdown command, then removed DHCP features from outside interface. Added Comcast DNS servers, default route, ntp servers, configured DHCP features on the inside interface. Enabled HTTP/SSH (inside & outside interfaces) and ICMP echo-reply (outside only).
I believe the Comcast modem is not configured correctly. The show version and show startup output are below.
ciscoasa# show version
Cisco Adaptive Security Appliance Software Version 9.1(1)
Device Manager Version 7.1(2)
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Feb 26, 2011
We have 2 ASA 5520's working in active/standby mode and both have the IPS module installed then 2 firewalls have also been upgraded to have 2GB of memory.
I have been asked if it is worth upgrading to 8.4 from 8.2. There is nothing wrong with our current firmware and if it isn't broken then why change strings to mind, but I also dont wnat to be left behind.
I've upgraded the firmware on the ASA's before, but they have been pretty simple. I do the standby ASA first and wait for it to come up, then do the other. However I think 8.3 and 8.4 are big jumps and have issues with NAT (we have a lot of NAT's and NAT exempts). I have had a quick read of 8.4's document, but has actually upgraded from 8.2 to 8.4?
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Apr 25, 2012
I'm in the process of upgrading our ASA 5520's from 8.2 to 8.4. I have sufficient memory installed and have read many posts in this forum on different upgrade strategies. I have an active/standy configuration and have settled on upgrading the standy unit from 8.2 to 8.3 then to 8.4, fixing any errors, testing traffic and then upgrading the primary unit to the latest rev. I've read where active/standy mismatching is supported but for a short period. My question is how long will I be able to run two boxes with different software? Unfortunately I don't have the option of doing this off line in a lab.
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May 15, 2013
official or unofficial (official more preferable) guide about upgrading IOS from 8.2 to 8.4 on ASA 5520 model?
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Jul 2, 2012
After upgrading an ASA5520 from 8.4(1) to 8.4(4.1) I ran into the following trouble:
Asymmetric NAT rules matched for forward and reverse flows; Connection for tcp src outside:192.168.149.21/53 dst inside:192.168.37.123/53 [code].....
All the subnets mentioned above are connected via VPN.
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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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May 19, 2013
We've got a fairly plain-vanilla VPN configuration on a C3660 router running IOS 12.3(26) so that our employees can initiate VPN sessions to our office using their Windows or Linux workstations. In a typical windows L2TP VPN configuration, the default route is set to the VPN server, and no other routes are passed to the clients, which means that if the client disables "use default route" setting, even getting to the office network fails.
I know there's a way to do this, but I haven't found it yet. What I want to do is pass local routes to the client so that only those routes transit the VPN, and permit the clients to use their own default routes.
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May 27, 2012
My company AP 1231G is not passing the DHCP address to the client from the DHCP server, my config listed below basicly the AP is on its own VLAN 10.1.123.1 and the DHCP server is 10.1.10.2 -- trying to use iphelper to pass DHCP to clients and the AP is on static IP 10.1.123.2--
!
! Last configuration change at 13:15:56 +0800 Fri May 25 2012 by root
! NVRAM config last updated at 13:15:56 +0800 Fri May 25 2012 by root
!
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Sep 17, 2011
I have two attachments that show my basic network layout. I can get from the VPN Cisco Client to Workstation 2 just fine with my current NAT rules in place. I can also get from Workstation 2 to Workstation 3 just fine. But I'm having issues when I try to get from the VPN client to Workstation 3... What would I need to do enable to get to Workstation 3 from the VPN client? IT seems very simple to me (just PAT that traffic as I do the traffic from Workstation 2 to Workstation 3) but that does not work.
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Nov 14, 2011
So here's what I think I should do to give email access only to a segment of addresses of my inside network.
1) Create a network object for 62 machines that will represent my dhcp clients.I plan to use 192.168.0.65-192.168.0.126. So I will use address 192.168.0.64 with netmask 255.255.255.192. Then set DHCP server to service this address range.
2) Create an ACL which will Permit Any to use tcp port 110 (pop3) to get to the outside. Which leads me to question #1:
How do I permit the source "Any" to communicate with "Any Less Secure Networks" like the implicit rule that gets zapped once I create new ACL? Is "Any Less Secure Network" implied by the "Any" destination?
3) Create an ACL which will Deny my DHCP range to talk to the outside.
4) Create an ACL which will Permit Any to talk to Any Less Secure Network(essentially recreating the implicit Permit ACL that got zapped).
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Oct 9, 2012
I have a Cisco RV220W running the latest firmware (currently 1.0.4.17), and I have noticed that after about a week of use, wireless clients can no longer acquire IP addresses via DHCP.
I have used Network Monitor on both the DHCP server, and the WiFi client, and can see that the server is receiving the requests and sending a reply, but the client never sees the response from the server. So far the only way to resolve this is to reboot the router.
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Dec 18, 2012
it is possible to create a Windows Active Directory group of users which I can use to permit access through the ASA (5520) firewall? I only can find vpn authentication with Radius but nog specific information about granting AD groups internet access via the ASA.
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Feb 21, 2012
it is possible to create a Windows Active Directory group of users which I can use to permit access through the ASA (5520) firewall? I only can find vpn authentication with Radius but nog specific information about granting AD groups internet access via the ASA.
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Nov 5, 2012
We currently have an ASA 5520 communicating with 10 ASA 5510's, all on static outside addresses. I was asked to add 5 additional 5510's on dynamic address. All worked well in testing until it was decided that some of the dynamic clients needed to talk to each other.
My testing shows packets just dying in the 5520.
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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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Apr 30, 2011
I've looked at many others having this same problem, but can't seem to figure out what my problem is. Same issue as most, I can connect fine, I get an IP, but it won't pass any traffic, I can't ping anything or access anything.
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Sep 21, 2012
I have a vendor that currently uses a Cisco 871 as a VPN router in our company network, they use it connect to provide services to one of the servers in our LAN for our customers. Recently, we are going to be setting up a 24/7 call center with this vendor, they will be accessing a server in our network through the VPN to provide customer service during after hour periods.We have a problem however, with an application that is hosted by another vendor that is critical for our regular company call center. Access is reached with this application through this vendor by way of IPSec VPN tunnel that is built in our company's Cisco ASA 5510. This application is accessed via Internet Explorer that goes across to access the application at the endpoint
I need to figure a way by which the vendor that will be running the 24/7 call center coming through their tunnel in our network to connect over to the tunnel on the vendor on my ASA. Im likely going to have to set some routing of traffic in my internal default gateway router for this to work.
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Sep 7, 2011
I've got a client that recently got an ASA 5505. E0/0 is connected to the outside, E0/1 connected to the internal server (Win 2008). The ASA "local network" is 172.30.1.0/24; my internal network is 192.168.1.0/24. I'm able to connect from home through AnyConnect and get a proper address (which I've got a pool of 172.30.1.64/26 assigned for VPN users), but no traffic from my computer will go to the internal network, nor will the internal server (or the ASA for that matter) can't talk to my VPN'd computer.
On the firewall settings on the ASA, I've got it all open: any/any on both inside and outside, just to try and get anything to go through. I've even got split-tunneling working, but not traffic-passing! The config is below (redacting local AAA users).
[Code] .....
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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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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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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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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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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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Jul 25, 2012
I've been tasked with retiring a VPN Concentrator 3000 and replacing it with an ASA 5520. I'm trying to get a handle on how to set up the NATs and ACLs, since most of my experience is remote access VPNs, not site-to-site. Plus I've not configured a VPN 3000 in about 6 years so I'm having to re-learn a lot of the interface.
The VPN 3000 has a feature called LAN-to-LAN NAT rules that basically allow you to NAT an address on your internal network to an address on the "local" network for the LAN-to-LAN connection so it can then go through the tunnel to the remote side. The config looks something like this in the VPN 3000: [code]
Which looks to me like a "Static Policy NAT" in ASDM. So I set one of those up, that should be translating 172.16.3.151 on the inside interface to 192.168.200.151 on the inside interface (yes, the same interface) which should then (logically) be picked up as "interesting traffic" by the crypto-map and sent across the VPN tunnel. However, that doesn't seem to be the case - both the "packet trace" in the ASDM and traceroute from the source workstation show the packets getting to the inside interface, and then passed right out the outside interface to the internet router (which then drops the packets as they're a private IP).
what else do I need to do to make the crypto-map pick up the NATted traffic?
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