07-13-2015 02:38 PM - last edited on 03-25-2019 05:56 PM by ciscomoderator
Not sure what is wrong but something has broken lately with inbound FTP connections. we update to 9.1(6) and sense then Active FTP connections just don't work correctly. Can some one help?
07-13-2015 03:42 PM
Hello Jason,
If the clients are behind the firewall and active FTP is being used it will require to have the FTP inspection enabled.
You can confirm if this is enabled with the command show run policy-map.
Can you provide the output from the command show service-policy if you have the inspection enabled.
http://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/113110-asa-enable-ftp-00.html
If the connections are being established you can setup a capture with a circular buffer and confirm what happens at the end of the communication and analyse it with a packet sniffer.
http://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/110117-asa-capture-asdm-config.html
07-14-2015 09:13 AM
here is the show run-policy
-------------
Policy-map type inspect dns preset_dns_map
parameters
message-length maximum client auto
message-length maximum 512
policy-map global_policy
class 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 sip
inspect xdmcp
class class-default
user-statistics accounting
-----------
07-14-2015 11:03 AM
The inspection is enabled. Now as I recommended before you may setup captures on the firewall to analyze the traffic and be able to determine the reason for the failure.
Can you confirm what is the problem. Are the connections failing to be established ? Are the connections dropping after a while?
You can run your test and gather the show service policy prior and after and confirm if there are drops related to the FTP inspection and if the counter increases.
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