problem with FTP access on BIG IP V11.2.0 HF1

Question

Hi,&nbsp;

&nbsp;
&nbsp;

we have upgrade our 2 BIG IP on active/standby to version 11.2 HF1 and we met a problem with FTP access to our servers(vs ftp on port 21 and pool with members on ports 21), However the problem did not arise on version 11.1.0 HF2 despite that we used the same configuration (vs ftp on port 21 and pool with members on ports 21)
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&nbsp;
you have already met this problem?&nbsp;

&nbsp;
&nbsp;
are there any special configuration for FTP (Virtuel servers and pool)?&nbsp;

&nbsp;
&nbsp;
Thanks.&nbsp;

nitass · Answer

is the problem on ftp active or passive mode? 
&nbsp;  
&nbsp; if it is active, is server using standard data port, i.e. 20, or custom one?

dechir_21483 · Answer

We use FTP actif. and we use 20 for data transfert. However I infom you that FTP access work normally on version 11.1.0 HF2 and since we have upgrade our version on 11.2.0 we can't do FTP acces to our server and after equiepemnts are restored with version 11.1.0 HF2 the FTP acces work.

for resume:

FTP work with 11.1.0 HF2

FTP not work with 11.2.0 HF1.

Thanks.

nitass · Answer

this is my testing. 
  
 root@(ve11a)(cfg-sync Changes Pending)(Active)(/Common)(tmos) show sys version

Sys::Version
Main Package
  Product  BIG-IP
  Version  11.2.0
  Build    2451.0
  Edition  Hotfix HF1
  Date     Tue Jun  5 23:45:09 PDT 2012

Hotfix List
ID387964  ID387843

root@(ve11a)(cfg-sync Changes Pending)(Active)(/Common)(tmos) list ltm virtual ftpvs
ltm virtual ftpvs {
    destination 172.28.19.252:21
    ip-protocol tcp
    mask 255.255.255.255
    pool ftppool
    profiles {
        ftp { }
        tcp { }
    }
    snat automap
    vlans-disabled
}
root@(ve11a)(cfg-sync Changes Pending)(Active)(/Common)(tmos) list ltm pool ftppool
ltm pool ftppool {
    members {
        200.200.200.101:21 {
            address 200.200.200.101
        }
    }
}

on client

[root@centos251 ~] netstat -tan
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address               Foreign Address             State
tcp        0      0 172.28.19.251:33751         172.28.19.252:20            ESTABLISHED
tcp        0      0 172.28.19.251:57367         172.28.19.252:21            ESTABLISHED

patrick_norde · Answer

Hi dechir, i just found this topic. At this time I am working on a project for one of our customers and experience the same (almost) FTP problem.  In my case the FTP communication flows from internal to the Internet (GTM link load balancing). In order to troubleshoot this problem I built a test environment using v.11.2.0 (NO HF1), this gives no problem. The problem starts with HF1. 
&nbsp;  
&nbsp; I made some tcpdumps in internal as well as external interface and can clearly see that the BIG-IP is modifying the response of the server after the client sends a passive request. 
&nbsp;  
&nbsp; This looks like some problem we had in the past with other releases. 
&nbsp;  
&nbsp; Have you allready submitted a service request with F5 ?

hervé_schlecht_ · Answer

Hi Dechir, 
&nbsp;  
&nbsp; I found the same problem when I upgrade my HA configuration from 10.2 to 11.2.0 HF1. We had not problem with the old release but the problem begin after the Upgrade. I have seen you had the same problem, did you found a solution to the problem ? Thanks for your help. 
&nbsp;  
&nbsp; BRgds

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problem with FTP access on BIG IP V11.2.0 HF1

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