Cisco :: Asa Dns Inspection Can See Alot Of Dns Drops
Jul 8, 2011We have ASA 5580 with multiple context in our company. On the one of the context (where the DNS servers are located) i can see a lot of DNS drops.
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Cisco Firewall :: ASA 5520 / How To See / Log Drops Due To Inspection
Jan 29, 2013ASA 5520 running 8.4.5:We had an issue with a remote SMTP connection getting screwed up as a result of ESMPT inspect.It took me 3 hours of troubleshooting the SMTP connection before finally figuring out that the firewall was the culprit. What really through me off was that I saw nothing in the ASA logs (warning and above) that showed packets were being dropped. I'm probably crazy but I thought I remembered seeing entries in the log when packets were dropped due to a type of inspection (specifically, I remember entries in the log saying something to the effect of packet dropped due to ESMPT inspect, packet too big). My quesiton to Cisco TAC was: Is there a simple way to have the log give a warning every time a packet is dropped due to any inspection rule, just like we can see any drops due to ACLs? So far the only answer has been a complex list of log changes to allow debugging and notifications of certain events. This isn't something I want to roll out to all my ASAs.
View 5 Replies View RelatedCisco :: ASA ICMP Inspection Not Working?
Jan 31, 2012More and more recently I'm seeing that inspect ICMP and ICMP error do not allow trace route to work through the firewall from inside to outside.I used to go in, enable the inspections and subsequent trace route's worked. Now when this is enabled, the firewall still blocks return trace route.
View 4 Replies View RelatedCisco :: Monitor Inspection Load IPS ASA-SSM-20
Sep 22, 2011I am aware there is a feature request but don't see any updates. Taking the chance here that its fallen through the cracks and someone has figured out another way to monitor inspection load on ASA-SSM-20 IPS. We are currently running 7.0(5a)E4. I want to be able to use Solarwinds Orion to monitor Inspection Load on our IPS devices.
View 1 Replies View RelatedCisco WAN :: ASR1002 - Inspection Of ACL Hits
Aug 17, 2011I'm aware ACL's are handled in hardware on the ASR platform but wondered if there was any way to inspect how many hits we get on each line of an ACL on the ASR, I can't seem to find a command to do this.
Using LOG is not possible due to the large number of hits.
Cisco Firewall :: ASA 5510 - FTP Inspection
May 25, 2011I have multiple customers and servers behind my ASA5510s. After moving a new customer with an FTP server behind the firewalls, they immediatly had issues with customers connecting to their FTP server. I had the default inspection rules running regarding FTP. After removing the "inspect ftp" from the global policy their issues went away. Since this is a larger customer I can't force them to change their server, I need to accomodate and fix this on the firewall. I left the "inspect ftp" command out and there have been sporatic issues from other customers, unable to connect to outside FTP servers from the terminal servers and timeouts and disconnects to our own FTP servers.
This is what I "think" is the solution.. I added a second inspection policy after the default one and only added "inspect ftp" to it. Then I used the "exclude" option to exclude the new customer. That new customer is fine and things are better, but still not working right. Does the following config accomplish what I want?? Does the exclude ACL get what I need or do I need an "include" or permit statement in that ACL?
object-group network DM_INLINE_NETWORK_10 network-object 172.24.X.0 255.255.255.0
object-group service DM_INLINE_TCP_1 tcp port-object eq ftp port-object eq ftp-data
access-list global_mpc extended deny tcp any object-group DM_INLINE_TCP_1 object-group DM_INLINE_NETWORK_10(code)
Cisco :: HTTP Inspection URL Filtering On An ASA 5505?
Jan 12, 2011Im trying to configure HTTP Inpsection with regex matching on a ASA 5505 (8.2) so that I can deny all websites apart from google and yahoo. And also enclude host 192.168.1.2 from this inspection. I have been through a number of examples and the syntax below appears correct but appears not to work. The logs report only that traffic has been dropped by the inspection policy.
View 11 Replies View RelatedCisco Switching/Routing :: ARP Inspection On SF-300 Switch
Aug 20, 2012I have an SF-300-24 port switch and am having an issue. When a device says "Who has 192.168.0.1" (which is the default gateway) two devices are replying in the affirmative, and therefor the MAC address table is getting screwed up. I know the correct MAC address of 192.168.0.1 is 00:1b:21:95:02:b0, so how do I tell the router to disgard any packets that say otherwise? I tried to figure out DHCP snooping and IP source guard, and ARP Inspection, but I am not getting anywhere and keep losing connectivity to the switch.
Obviously a device on the network is misconfigured, unfortunately it is a large wireless network and the misconfigured device is 30 miles away on the top of a mountain. I am hoping to bandaid it locally and then eventually go out and fix the offending equipment.
Cisco Firewall :: How To Disable TLS Inspection For SIP On ASA5510
Jun 13, 2012I am using the Cisco ASA5510 for my Telepresent infarstructure. I have a problem with Encrypted SIP calling for call in/out.
Is there is a way to disable the TLS inspection for Cisco ASA5510?
Cisco Firewall :: ASA 8.4x ESMTP Inspection Bug CSCtr92976
Aug 9, 2012We have several customers running ASA 8.4x code and all seem to be plagued with the ESMTP inspection bug CSCtr92976.I have tested this in the lab with an ASA 5505 running 8.4(1), 8.4(2) and 8.4(4)1 & 8.4(4)3 and the behaviour is always the same. I have an Exchange 2007 server and I can see in the logs the following messages:
2012-08-10T13:04:37.331Z,EXCHANGEDefault EXCHANGE,08CF3610468A42D7,3,192.168.102.28:25,192.168.250.26:52756,<,XXXX XXXXXXXXXXXXXXX,
2012-08-10T13:04:42.345Z,EXCHANGEDefault EXCHANGE,08CF3610468A42D7,4,192.168.102.28:25,192.168.250.26:52756,>,500 5.3.3 Unrecognizedcommand, 2012-08-10T13:05:20.506Z,EXCHANGEDefault EXCHANGE,08CF3610468A42D7,5,192.168.102.28:25,192.168.250.26:52756,<,XXX,
This is with the default ESMTP inspection enabled. I have also created a custom ESMTP inspection policy that does nothing but log and the behaviour is still the same. Sometimes traffic will pass but most of the time it won't. The workaround is to just disable the ESMTP inspection.
Cisco Firewall :: RFC2671 / Default ASA DNS Inspection
Sep 21, 2011By default ASA applies DNS packet inspection with a default (maximum) packet size of 512bytes as recommended by RFC 1035, anything above is dropped.
I have a customer that is trying to use larger packet sizes due to extension mechanisms for DNS defined in RFC2671.
My question is , is it safe to increase the default packet size in the DNS inspection thus applied globally for all DNS traffic, or should / can we apply a policy that applies only to this specific customer ?
Cisco Firewall :: HTTP Inspection On ASA 5505
May 3, 2011let me know how to enable HTTP inspection in ASA 5505 through ASDM.
View 1 Replies View RelatedCisco Switches :: How To Configure Dynamic Inspection For 300 Or 500 Series
Mar 6, 2013How config dynamic alp inspection for 300 or 500 series ? I find in admin guide it's no simple to do.
View 8 Replies View RelatedCisco Firewall :: No Class Inspection Default On 5505?
May 9, 2012I was under the impression that all Cisco ASA firewalls shipped with a default inspection policy.
Example
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
[Code]......
can I build this myself? Why is it missing (I have two other ASA 5505s here that also do not have it). What would I do to rebuild it?
Cisco LAN :: 2651XM Command To Disable Packet Inspection?
Oct 3, 2012-cisco 2651XM
-IOS: c2600-ipbasek9-mz.124-23.bin
I need to diable RDP packet inspection on this router but I can't find where I do that. I'm having troubele with audio on a sip line and I read here (bottom of page) url...that turning off RDP packet solved the problem. I've looked through the config and searched on google but couldn't find the asnwer. what is the command to turn off RDP packet inspection?
Cisco Security :: 3750 / Dynamic ARP Inspection - Windows 7?
Mar 2, 2011I have a network of 3750's configured for DAI with DHCP Snooping implanted and working with windows XP for around a year. Now we've changed a couple machines for windows 7. I have a floor with around 200 workstations on XP and about 4 on Seven.Two of these WIN7 are triggering the err-disable for arp inspection (configured by default to block interfaces sending over 15 arp pps) I noticed that when I go on windows -> network and I do a refresh, sometimes (most of the time after boot up or idle time) it will trigger the massive arp response on the network. I noticed that all hosts on the network updated their arp entry for that computer(win7) at the same time, for some reason I don't know. The windows 7 tries to reply over fifty arp requests for its IP which caused the port to be put on err-disable.There were no applications running on the windows7 computer at the time of the tests, only wireshark and its default services.This computer has configured:DHCP with WINS Its on a windows domain has netbios over TCP.
View 1 Replies View RelatedCisco Firewall :: Default FWSM 4.1 Inspection Policy
Jan 10, 2011On FWSM (running version 4.1 in my case) the default global policy uses the following class map:class-map inspection_default match default-inspection-traffic
What "default-inspection-traffic" includes? Is it all traffic? If so, do I really want all my traffic to go through the inspection engine? I would imagine this would have a performance impact on traffic that is not part of the protocols being inspected.
Cisco Firewall :: ASA 5520 SIP Inspection Process Is Not Working?
Jul 16, 2009I have an issue with Cisco ASA 5520, The summary is below!
Packet # 1 on inside capture the Call-ID was: Call-ID: 2a54f680-
a5d1de2a-160c-164070a@10.7.100.1
Packet # 1 on outside interface the Call-ID was: Call-ID: 2a54f680-
a5d1de2a-160c-164070a@149.5.33.44 --- this bcz of the inspection.
Packet # 2 on outside capture the Call-ID was: Call-ID: 2a54f680-
a5d1de2a-160c-164070a@149.5.33.44
Packet # 2 on inside capture the Call-ID stay: Call-ID: 2a54f680-
a5d1de2a-160c-164070a@149.5.33.44 --- this is the problem.
(This suppose to be Call-ID: 2a54f680-a5d1de2a-160c-164070a@10.7.100.1)The inspection should change the Call-ID for the incoming packet as it did with the outgoing packet. Whenever, the CM receive the trying message with different Call-ID it considered as new session and it keep sending invitation messages for the SIP provider.NAT is enabled.
Cisco Firewall :: ASA5580-40 Deep Packet Inspection?
Jan 18, 2012I am having issues with PXE boot images for PCs cannot be loaded from remotely.The diagnosis revealed that SunRPC & TFTP were being inspected by ASA causing drop of packets.So I excluded these two inspections for the particular server behind the firewall. It seem to resolve the issue for instance but it crawled back again.
Is there a way that the inspection can be turned off for that particular server at the IP level?
How To Allow Skype Through TMG 2010 With HTTPS Inspection Enabled
Nov 9, 2011I have got a TMG 2010 and i want to use Skype through it. if HTTPS inspection is enabled skype doesn't work, if it is disabled skype is working.What can i do for using Skype behind a TMG with httsp inspection so i want to use 8080 port only.I have excluded the 1 PC from HTTPS inspection or the destination URLs from HTTPS inspection.
View 1 Replies View RelatedCisco Firewall :: ASA 5505 / Skinny Inspection Closes Connection
Dec 31, 2011I have a branch office set up were all traffic goes back to the core, iincluding internet acces.
It has been working fine for a year, but recently I have started to see the firewalls Asa 5505 closing the connection and stopping the phone from answering the calls.
I have skinny inspection turned on all my branch offices, but had to turn it off at the one site to get one of my phones to registered.
I haven't made any changes to the network that would trigger this issue, such as upgrading phone firmware.
My firewall is configured for default deny, other than Skinny (tcp 2000), do I need Skinny inspection to be turned on?
It's turned on my 5 other branches.How can I debug why the skinny inspection is closing the connection?As a separate note this phone is part of a pool of phones that shares a common DN, would this be causing the issue?
Cisco Firewall :: 2821 - ZBF - Inspection Slows Down HTTP Downloads
Mar 8, 2011I Have a 2821 Router with a IOS Version 12.4(13r)T. When i enabled the firewall, my download speed slows down to 10-20kbps (the normal is 5-6 Mbps).
View 11 Replies View RelatedCisco Routers :: Disable H323 Inspection In RV120W Router?
Oct 4, 2011I have two RV 120W routers with a IPSec VPN.I have problems with VoIP traffic inside the VPN.In PIX and ASA systems I know the solution is disable h323 inspection. Possible to disable h323 inspection in a RV 120W Router?
View 2 Replies View RelatedCisco Firewall :: ASA 5520 - Inspection Of MSSQL Dynamic Port
Jun 5, 2012I need to allow traffic between webserver in dmz and mssql (Microsoft SQL Server 2008).MSSQL use dynamic port (now it is 63796) and this cannot be changed.
Basically, I can allow such traffic using next configuration:access-list dmz extended permit tcp host 1.2.3.4 host 5.6.7.8 eq 1433access-list dmz extended permit udp host 1.2.3.4 host 5.6.7.8 eq 1434 access-list dmz extended permit tcp host 1.2.3.4 host 5.6.7.8 eq 63796
But, I would like to add mssql inspection and I did the next:
class-map class_sqlnetmatch port tcp eq 1433policy-map global_policyclass inspection_default inspect dns preset_dns_map inspect ftp inspect h323 h225 inspect h323 ras inspect ip-options inspect netbios inspect rsh inspect rtsp inspect skinny inspect esmtp inspect sqlnet inspect sunrpc inspect tftp inspect sip inspect xdmcp class class_sqlnet inspect sqlnet service-policy global_policy global
[Code] ..........
Cisco Firewall :: 871 / 2811 / 1841 - ZBFW Default Inspection Specification
May 6, 2011I can't find any specific information on the implementation of packet inspection in a zone based policy firewall. In other words, is there a specification or even just a set of values that define the default inspection parameters for all protocols? With DPI I can manage 'some' of the inspection capabilities but I have some fairly rigorous and specific requirements to meet and I need to validate that the IOS ZBFW will meet those requirements. Specifically, I'm interested in HTTP, DNS, and ICMP but all other protocols would be useful as well.I'm working with basic routers; 871's, 2811's, 1841's, etc. The IOS in use in most cases is adventerprisek9-mz.151-3.T.
View 4 Replies View RelatedCisco Firewall :: ASA 5520 Default Inspection Engine Dropping Connections
May 25, 2011I currently have the default inspection engine configured in my firewall to inspect http traffic. I noticed that the ASA will drop packets when visting legitimate websites. I've tried googling for a workaround but have been unsucsselful. How can I exclude some websites or IP's from being affected by the inspection engine?
View 1 Replies View RelatedCisco Firewall :: ASA 5520 CSC Module Per Subnet / IP Group Inspection Profile
Sep 7, 2011verify if the ASA 5520 CSC module way of applying security policy (http, smtp, pop3, etc.) is per network/subnet or group of users? Based on my understanding through reading, web and email protection profile/config is global. It will be the same to every network user that is redirected via service-policy config on the ASA.
Scenario: I have two VLAN, guest and employee. Of course guest and employee have different web filter profile. Can i configure it such that guest web-filter profile is not just strict while employee's access is limited only to productive internet sites.
Cisco Switching/Routing :: Dynamic ARP 3560 Inspection On Single Vlan
Apr 22, 2013I have enabled IP DHCP snooping on a 24 port 3560 switch (v small office) and let the database fill up, now I have added dynamic arp inspection on the single vlan and I amd getting these errors.
Apr 23 16:15:34: %SW_DAI-4-DHCP_SNOOPING_DENY: 1 Invalid ARPs (Req) on Fa0/5, vlan 1.([5835.d9b0.b9d1/172.30.5.2/0000.0000.0000/172.30.5.3/16:15:33 BST Tue Apr 23 2013])
Apr 23 16:15:39: %SW_DAI-4-DHCP_SNOOPING_DENY: 1 Invalid ARPs (Req) on Fa0/8, vlan 1.([0004.f2be.55e4/172.30.5.5/0000.0000.0000/172.30.5.8/16:15:39 BST Tue Apr 23 2013])
Apr 23 16:15:40: %SW_DAI-4-DHCP_SNOOPING_DENY: 1 Invalid ARPs (Req) on Fa0/8, vlan 1.([0004.f2be.55e4/172.30.5.5/0000.0000.0000/172.30.5.8/16:15:40 BST Tue Apr 23 2013])
[Code] .....
Cisco Firewall :: Trace-route Through ASA 8.2 Is Not Working When ICMP Error Inspection
Jun 6, 2011I have problem with icmp traceroute configuration. When I enabling icmp error inspection in global policy, my traceroute results through ASA 8.2.4 looks like this: My traceroute [v0.75]
icmp inspection and ttl decrement on ASA is enabled. Also I configured ACL on outside interface to permit ICMP completely.
Cisco Firewall :: ASA5512-X Outbound Email With ESMTP Inspection Disabled
Jan 14, 2013I have a client that is running an ASA5512-X. When I initially installed it, they were having issues sending out emails. I disabled ESMTP inspection and thought it resolved the issue. Recently, they upgraded to Exchange 2010 and are still having an issue with some emails getting hung up in the queue. If I watch the ASA when they try to telnet to the external mail servers that do not work, they get a SYN timeout.
I am not sure why this would happen since ESMTP is disabled. They are running 8.6(1) on the ASA.
Cisco Firewall :: ASA 5500 - HTTP Inspection Spoof Server String
Aug 11, 2011I'm looking fot a way to do static URL blocking with ASA and when the URL is blocked present a "Web Page" to the user saying that it's been blocked.
So, i was wondering if i can use the http parameter "spoof server string" to replace the original URL sent by the user for another URL that points to an internal web server holding a basic page saying "Your URL request has been blocked".
The point is to have a way to tell users that the page they are trying to browse is blocked by a policy.
Cisco Switching/Routing :: 3750 And 3560 - IP ARP Inspection Error In Windows 7
Jun 14, 2010We have ip arp inspection and dhcp snooping enable in couple of 3750 and 3560 switches. Everything works fine, excepted few case that DAI packet rate trigger and errdisable the port. Later on we found out that most of computer that trigger DAI is Windows 7 and especially when they are in sleep mode. Not sure if anyone experiencing it with Windows 7. Also we have it rate limit at 64.
View 2 Replies View RelatedCisco Firewall :: ASA 5520 Removed Icmp Inspection From Default Policy-map
May 10, 2012i have removed the icmp inspection from my default policy-map in my ASA 5520,now i could not able to ping to 4.2.2.2 from my LAN even though i have configured an ICMP Access-list in my asa like ,but I can't ping 4.2.2.2 for testing the Internet connectivity,what shall i do to allow only my self as admin to ping outside?
-icmp permit host 192.168.60.60 echo
-icmp permit host 192.168.60.60 echo-reply