Cisco Firewall :: 8.2.4 External Users Will Be Intermittently Dropped
Jan 14, 2012
We just upgraded from 8.2.4 to 8.2.5.20 on each firewall. The Primary and Secondary work when they are standalone but, when we connect the fail over link from the Primary to the Secondary, invariably, one of them will go into a constant boot cycle and one will be active but, external users will be intermittently dropped. As soon as we unplug the fail over, the firewall that stays up behaves normally. This is with 8.2.5.20 code or any other code for that matter?
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Mar 7, 2011
I am using my ASA 5505 to remote VPN. I use both windows and Macs. I use the Cisco VPN client software on the windows machine, on the Mac I have used both the Cisco VPN software and the built in OS X VPN client.
I am able to VPN with all machines, but randomly the VPN will disconnect all users. I know there is a setting that may fix this which I think I tested in the past and it did not work, but I have now forgotten it.
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Jul 27, 2012
ISP - Comcast Cable Internet Modem model SMCD3GNV wired/wireless combo (2 pcs connected 1 wired 1 wireless)When the connection is online, the speeds are fine- the issue is the 2-3 times a day when the connection drops off. The error that we are getting is "cannot connect with primary dns server" however in our attempts to restore the connection we have: [code] is there some issues in the area that we are not aware of? being that the signal levels are within range what do you think the problem resides in? FYI, both connections, the wired and wireless connections both have connectivity issues equally.
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Nov 28, 2011
I have a issue that i am at a loss as how to solve it. I have an ASA 5505 as my firewall. I have users from other companies who visit from time to time and are unable to use their outlook email to send messages. They can however receive messages without a problem. I also have a situation where users who use windows live to access gmail are unable to send messages.
I have narrowed it down to the fact that these uses are using ssl/tls to send the mails. I did some research and found out about the inspect esmtp setting in the ASA. I have disabled it and i still have to problem. I have also removed all outbound deny statements and still no luck.
Of note is that i can send emails without attachments. They take a long time to go out ( from minutes to hours) but eventually they do. Emails with attachments of even 10k do not go at all.
I was running image 8.2.3 and i downgraded to 8.0.5...still did not work...i upgraded to 8.4.3...still did not work. I am now back at 8.2.3.
My Firewall config is attached. I am at my wits end as to what else to try. The company has not renewed support for the device so i am on my own here!
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Jul 6, 2012
I have WLC 5508 and 18 1242 APs are connected to WLC. I am getting following error messages in all APs.
*Jul 3 02:53:18.263: %LINK-5-CHANGED: Interface Dot11Radio1, changed state to reset
*Jul 3 02:53:18.320: %LINK-3-UPDOWN: Interface Dot11Radio1, changed state to up
*Jul 3 02:53:18.326: %LINK-3-UPDOWN: Interface Dot11Radio0, changed state to
[Code]......
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Nov 14, 2012
We're running Cisco Secure ACS V5.1 on a Linux platform to manage remote access to many networking devices. This has not been in place long, and is generally working OK. However, whenever I set the parameters of the user authentication to 'disable user account after X days if password was not changed', so as to comply with our internal security regulations, the user IDs seem to disable themselves intermittently, irrespective of whatever number of days I put in this - this can be a couple of days after re-enabling, or just a few minutes.
This can be found in the advanced tab here: System Administration > Users > Authentication Settings.In the mean time, we are having to set the user authentication to be non-expiry. Is this a known fault with this version of software? If so, would there be a patch available, and how would I go about obtaining it?
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Apr 7, 2011
They are all on the same domain but some of these users are getting dropped from the Internet, and email. Once they restart there PC it works for a couple of hours than it drops again. We also tried updating the network driver after doing that it works ok for a couple of hours after that they start lossing connection to the Internet and email again. We have tried several different things but have not being succesful in finding the issue.
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Dec 14, 2011
I have a new Cisco 2951 router and I am trying to configure it for external users to connect to an internal ftp server. I created a firewall and added rules so as to allow ftp connections from the outside to the internal ftp server. I configured NAT so as to allow incoming connections through the router. I have been unsuccessful so far in trying to make this ftp connection work.I am using a zone-based firewall and for the particular ftp rule, the action is inspect so as to allow stateful inspection of packets.
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May 13, 2013
I have web server setting behind the Linksys ADSL modem, I set the DMZ IP to my web server IP so the external internet users can access my web pages.
This setup was working fine until I switched to “Linksys X3000” modem, external internet user can no more access my web pages.I had set the DMZ IP correctly in the new modem. The local LAN users can access the pages without any problem.
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Nov 13, 2012
we recently upgraded from an RVS4000 router which didn't have this issue.
the problem; Internal users from Site A cannot access the external owa address.From Site A i can successfully ping both the external/internal IP addresses/names and they resolve correctly, including pinging the address ('mail.company.com") resolves correctly to the external ip address.
[code]...
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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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Jul 5, 2012
I am configuring a 2921 with enhanced security using the CCP. I have found a behavior that seems strange to me and I'm not sure if I'm misunderstanding something or missing a setting. It seems that if I create a firewall rule to "allow" traffic through, that traffic gets dropped, but if I set the action to "Inspect", the traffic comes through fine. I can actually reproduce this at will by setting up a rule from out-zone to self to allow traffic and I cannot telnet into it from an external ip, but if I change that rule to "inspect" i can connect fine (i dont want that rule set up permanently, was just using it to test the firewall).
If I set the allow rule to log, I see the following line in the application security log:
(target:class)-(ccp-zp-out-self:user-fw-ccp) Passing telnet pkt 1.1.1.1:58141 => 2.2.2.2:23 with ip ident 0
(where 1.1.1.1 is the external laptop and 2.2.2.2 is my WAN IP address of the 2921)
So it looks to be passing the traffic, but that traffic is getting dropped somewhere because the connection is unsuccessful.
Is this the expected behavior of "Allow" action? Is there something I can do to make sure "allow" traffic actually gets through?
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Oct 19, 2011
I have a server in a DMZ behind the ASA, connections to this server work sometimes and then fail others, so I dont think i'm looking at an ACL or NAT problem here.The syslogs report a SYN Timeout,I have taken a trace on the ASA, it seems that a SYN-ACK does come from the destination server within the 30sec timeout, but its not passed through the ASA back to the source ? there is one odd thing, what seems to be an out of sequence ACK from the destination which arrives before the SYN-ACK at the ASA, i'm wondering if this might be the problem ? This only occurs on the connections which fail, the connections that work, the destination responds quickly to the initial SYN, and the 3way handshake completes.
Syslogs :
Oct 18 19:17:32 nzlsudfedsi001-pri Oct 18 2011 19:17:32 NZLSUDFEDSI001 : %ASA-6-302013: Built outbound TCP connection 42327212 for IIP-ARCHIVE-PROD:172.24.32.31/21 (172.24.32.31/21) to BPO-TRANSIT:x.x.x.x/59392 (x.x.x.x/59392)
Oct 18 19:18:02 nzlsudfedsi001-pri Oct 18 2011 19:18:02 NZLSUDFEDSI001 : %ASA-6-302014: Teardown TCP connection 42327212 for IIP-ARCHIVE-PROD:172.24.32.31/21 to BPO-TRANSIT:x.x.x.x/59392 duration 0:00:30 bytes 0 SYN Timeout
[code].....
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Feb 22, 2013
I have installed ACS 5.4 and we are looking to authenticate our Anyconnect users with ACS via Active Directory. I think I have the correct commands in our ASA ( we had ACS 4 and authenticated our anyconnect users ).
I also have configured ACS to use Active Directory and installed the server side cert in ACS. I'm just uncertain how to program ACS to use the security group that I have setup in Active Directory.
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Sep 2, 2012
We have one ASA 5510 but we got the error attached periodically for IPSec/SSL VPN connection but i configured timeout connection as none
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Jun 9, 2013
I happen to noticed the FWSM was dropping packets at about 387 packets every 5 minutes. My outside FWSM is WAN facing and has a 1gig link (35% utilized) my inside facing has about 100 downstream switches to the closets. I do not see my 6509's back plane is being over utilized and my understanding of the FWSM show be go for 5 gig so it isn't oversubscribe. Why i am seeing packets dropped?
[Code] ......
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Sep 5, 2012
We are implementing a new corporate headquarters and have bought a Cisco 5508. I have two connections plugged into the 5508 in ports 1 and port 2. Port 1 is for all internally wireless networks and connects to our core 6500 and use an external DHCP server scopes. Port 2 is for our guest WLAN and connects directly to a public network switch in front of (outside) the firewall. For the guest network, I have setup a vlan on the controller for dhcp and the interface setup to that vlan and dhcp scope built on the controller. how or can I NAT the internally addressing for the guest network to the public IP address on the controller. Essentially I want to drop of guest network traffic outside the firewall and not have to deal with setting up the firewall for any aspect of guest network traffic.
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May 30, 2013
We are working with an ASA 5520 and it seems there is an issue with some email messages sent throught it. When there are many recipients in the emails the email messages are not sent, and I have revised the server an the only thing I see is connecting dropped. When I went to see ASA log and see this log report: ESMTP Classification: Dropped connection for ESMTP Request from 'interface': servername/portnumber to outside: IP address/25; matched Class 2: cmd RCPT count gt 100 tcp flow from interface:servername/portnumber to outside: IP address/25 terminated by inspection engine, reason - inspector disconnected, dropped packet. So I think there should be an inspection of ESMTP packets and if they detect an email message sent to over 100 addresses, then the packet is dropped, am I right? if so, what should I do to let those email messages be sent?
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Jun 27, 2012
I am using a pptp server running on windows 2008 server and I have configured my ASA 5520 to let the PPTP traffic to pass throught.
The solution works quite well but exactly every 120 minutes the connection drops and people have to reconnect. Is there any setting to change? In the PPTP server I haven't found any setting to change.
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Dec 5, 2012
Our Cisco ASA 5510 running 8.4(4)1 just started dropping packets and our AnyConnect clients are seeing horrible performance. The system is extremely slow compared to just a couple days ago.Nothing has changed on the system. I can post the configs if needed.
firewall# sho int
Interface Ethernet0/0 "outside", is up, line protocol is up
Hardware is i82546GB rev03, BW 1000 Mbps, DLY 10 usec
Full-Duplex(Full-duplex), 1000 Mbps(1000 Mbps)
Input flow control is unsupported, output flow control is off
Description: == WAN Interface ==
[code]....
I have done a "sho vpn-sessiondb detail svc" and I can see the dropped packets of the individual users, but cannot see why the packets are still dropping.how I can correct this and restore speeds?
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Jun 13, 2011
I have a a firewall policy on a Cisco 2911 - the zone policy from OutZone>InZone basically drops everything apart from inspected traffic on the opposite direction and a few essential traffic generated externally (such as Outlook web access and E-mail exchanging). However, I seem to be getting a lot of firewall drops coming from the immediate gateway of the ADSL WAN address to the internal IP range on port 3. I get about 10 hits every 5 seconds.
Policy:
policy-map type inspect FWPol_Out-In
class type inspect CCP_PPTP
pass
class type inspect FCMAP_In-Email
pass
class type inspect FCMAP_In-OutlookWebAccess
inspect(code)
%FW-6-LOG_SUMMARY: 1 packet were dropped from IMMEDIATE WAN GATEWAY:0 => INTERNAL IP ADDRESS:3 (target:class)-(FWPair_Out-In:class-default), the immediate gateway would ping an internal IP address? Keepalive? Could this be stemming from another problem? The traffic wasn't generated internally as all InZone>OutZone is inspected.
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Feb 26, 2013
I have some problem with the ASA 5510 ver 7.0(6). My manager wants to keep this as backup. tried lots of things but still users not able to access internet nor can i ping anywhere.For example when i ping 4.2.2.2 i dont get any reply.The runing config is below for ur ref :
HQ-ASA-01# show running-config
: Saved
:
[Code]......
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Feb 24, 2011
I have a normal setup of ASA5505 (without security license) connected behind an internet router. From the ASA5505 console I can ping the Internet. However, users behind the Firewall on the internal LAN, cannot ping the Internet even though NATing is configured. The users can ping the Inside interface of the Firewall so there is no internal reachability problem. In addition, I noticed that the NAT inside access list is not having any hit counts at all when users are trying to reach the internet.
When i replace the ASA5505 with a router with NAT overload configuration on it, the setup works normally and users are able to browse the internet.
The ASA5505 configuration is shown below.
hostname Firewall
interface Ethernet0/0
description Connected To Internet Router
switchport access vlan 10
[Code].....
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Jan 25, 2012
I purchased the license P/N: ASA-CSC20-250U-1Y with Description: ASA 5500 CSC-SSM-20 250-User License Only Renewal (1-year)
But I had a mistake because I need support to 500 users. Now, to solve my mistake I want to know Do I can purchase another ASA-CSC20-250U-1Y to provide the 500 users suppor?
I mean, ¿are two (2) ASA-CSC20-250U-1Y equivalent to the 500 user license listed below?P/N, ASA-CSC20-500U-1Y with Description: ASA 5500 CSC-SSM-20 500-User License Only Renewal (1-year)
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May 2, 2012
I keep struggling with Cisco ASA. How I can make a certain NAT (RDP, SSL or whatever) and securing it by allowing just one external client with fixed internet IP to make use of this NAT?
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May 6, 2013
I found a link to accomplish this on the old code but how can I get this done on 8.4.
[URL]
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Oct 5, 2012
I set up a cisco 2811 to replace a netgear router at the office. I have nat set up and with ccp I added a firewall on the router using the basic firewall wizard. Just about everything works internet, receiving and sending emails on exchange from the pc. Issue I'm having noone can access the company email on their phone.Also theres a camera system that would be accessible to view from the live feed from outside the office and my boss can't access the camera. I port mapped all the custom applications and added new traffic rule from self -> outzone. It didn't work tried to add one from outzone -> self or inzone but i get a prompt stating it only accepts protocols tcp,udp, sip, h323, icmp and a few other I can't think of. I'm pulling out my hair trying to get this to work everything worked seamlessly on the netgear router and nothing was really defined just the inbound ip address of the applications and protocols that are allowed.
Lets say for reference purposes my ip addresses for internet is
internet
55.34.23.43 /24
email server
192.168.10.252 /24
web cam application
192.168.10.10 /24
8000 in
8001 out
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Apr 20, 2012
I have 10 user license for Cisco ASA, i have to use this ASA for client connectivity. Can i do NAT of more than 10 users with this license? What i understand is NO.
But as per Below explaination looks like, i can if i am not doing default routing? Actually i just need to add a specific Route towards client DMZ interface on my ASA, no default route, so can i use more than 10 concurrent sessions with this license?
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May 20, 2013
I am using ASA5505 and I would like to block certain websites such as facebook.com on some users only
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Jul 2, 2012
There are 10, 50 and unlimited users profiles for the ASA 5505, reason for that restriction? Does that mean for example that only 10 users can go through a 10-user 5505?
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Aug 2, 2011
How can I filter my local lan's URL requests? Is it possible to have some sort of list like...
Default_User_Group
*.microsoft.com/*
*.mydomain.com
*.google.com
Then only allow certain ip's access to the entire internet like this...
Internet_User_Group
It would be nice to possibly be able to add the rules to users in my domain, then associate the domain account with an IP OR have them login to view webpages.
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Jan 21, 2013
I say the answer is ten. That means ten hosts can be behind the firewall and hit the internet. The eleventh doesn't get to go out. I'm being told by a coworker that the "10" in the part number refers to the number of IPsec VPN peers.
Who's right?
I say if you want an unlimited number of users on the inside to be able to get to the internet, you need the ASA5505-SEC-BUN-K9
Mfg. Part: ASA5505-SEC-BUN-K9
Mfg. Part: ASA5505-50-BUN-K9
Mfg. Part: ASA5505-BUN-K9
Cisco ASA 5505 10-User Bundle includes 8-port Fast Ethernet switch, 10 IPsec VPN peers, 2 Premium VPN peers, Triple Data Encryption Standard/Advanced Encryption Standard (3DES/AES) license ASA5505-BUN-K9
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Mar 13, 2011
I just configure an ASA 5520, here is the config (the ip address of outside network if going to change from private direccion by reason security).
The problem that I have is the users can access to the web site through the public´s ip address but they do not can access through by name. We review all the config on the server DNS and with the command NSLOOKUP we can see that work fine. The client think that the asa is blocked the connnection.
[code]....
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