Transfer Tool Issues

[nitaish]

We are facing a difficult time after migrating a website from one cPanel server to another. We have a customer who is facing some issues with his current VPS. We offered to migrate his website to another VPS. We migrated the entire cPanel account using the Transfer Tool. After the migration was completed, the website in the original VPS got automatically suspended and the DNS records were modified with the new VPS' IP address. As a result, the website stopped. When we changed the DNS records back to point to the original IP address, we started facing issues with the Proxy Backend. We observed the following

1. The /etc/apache2/conf/httpd.conf file has the lines ProxyPass "http://<Hostname_of_new_VPS"
2. The emails weren't getting delivered and we have to reset the service certificate for Dovecot and Exim to fix the issue.
3. The .htaccess of the websites get modified with the following line appended

RedirectMatch \.(dynamiccontent|pl|plx|perl|cgi|php|php4|php5|php6|php3|shtml)$ http://<Hostname_of_vps/cgi-sys/movingpage.cgi
4. The /var/cpanel/users/<user_name> file gets modified with the value of PROXY_BACKEND set to the hostname of the new VPS.
5. If we comment the line ProxyPass "http://<Hostname_of_new_VPS" as shown in the point 1 above and restart apache, the website starts working. However, in a few minutes it reverts back to original and the website stops with the following error


The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request

Reason: DNS lookup failure for: <Hostname_of_new_VPS>

Additionally, a 502 Bad Gateway error was encountered while trying to use an ErrorDocument to handle the request.

The Transfer Tool has certainly created lots of issues with the original server which was never the case with the earlier cPanel versions. It looks like cPanel has created a very big blunder by making changes in the Transfer Tool. Please help to resolve the issue permanently.

 

[andrew.n]

This is a bug in the current cPanel version and a fix is on the way as per @cPanelLauren mentioned earlier if I recall.

 

[kodeslogic]

@nitaish

You can refer CPANEL-33877 Live Transfer feature can lead to infinite proxy loop resulting in Apache DoS for more details on information shared by @cPanelLauren

 

[cPanelLauren]

Thanks @andrew.n and @kodeslogic that's correct, it is an issue with the transfer tool and is being fixed currently.

 

[tonyotonio]

Currently experiencing this now.


running:
whmapi1 unset_all_service_proxy_backends username=cpanelusername

Doesnt remove the .htaccess entries

mail are also not being routed/delivered

checking mail delivery shows this error:

also getting lookup of host "xxxxxx" failed in manualmx router


update:

running "whmapi1 unset_manual_mx_redirects domain=XXXX"
and restarting Exim
seems to have fixed the deliverability issue

 

[andrew.n]

Great fix, well done Tony!

 

[anton_latvia]

Great fix, thank you for sharing - some new "issue" to be aware of! :/

 

[Tarun Khanna]

whmapi1 unset_manual_mx_redirects domain

WHat is XXXX here ?

 

[cPRex]

The Xs in that example are the domain name of the account you are working with.

 

[amit210]

Hi.. just checking if the Transfer Tool issues were fixed? @cPanelLauren would you be able to confirm? I just completed a transfer, and didnt notice any Apache related issues, but the DNS Zone entries in the source servers are changed to the target server. Is there a way to avoid that? Has it always been like this?
Edit: ok you can ignore this.. just found out about the Live Transfer option..and that i can disable it. In case there is other information that may be helpful.. i'll appreciate. thanks.

 

[cPRex]

@amit210 - I'm glad you were able to find those details about the Live Transfer system. If you need anything else, just ask!

 

[lorio]

@cPRex The question was, if the issues around the Transfer Tool are fixed. Is that the case?

Thanks @andrew.n and @kodeslogic that's correct, it is an issue with the transfer tool and is being fixed currently.

The issue was confirmed three months ago. What is the current status?

 

[cPRex]

If we're talking about CPANEL-33877, that is fixed in version 92, which can be seen in the changelog here:

92 Change Log | cPanel & WHM Documentation

This document lists the cases and bugs worked on during the version 92 release cycle.

docs.cpanel.net

 

[Seff]

I had a similar issue after doing the Express Transfer and manual rolling back. The email client and webmail logins were failing with the following error:

Dec  4 23:22:06 hostname dovecot: imap-login: Aborted login (proxy dest auth failed): user=<[email protected]>, method=PLAIN, rip=1.2.3.4, lip=192.168.156.125, TLS, session=</Cf5xbC1Ft9Iw8Aw>

The doveadm output was like below:

# doveadm user cpanel_user

home /home/cpanel_user
host remote.hostname.com
userdb_ssl any-cert
userdb_host remote.hostname.com
ssl any-cert
nopassword y
userdb_proxy_maybe y
userdb_nopassword y
proxy_maybe y

The command "whmapi1 unset_manual_mx_redirects domain=main-doamin.com" didn't remove the entries from /etc/manualmx. So, I had to manually remove the domain entries from the it and restart the dovecot.

The entire steps are:

1. Removed domain entries from /etc/manualmx
2. whmapi1 unset_manual_mx_redirects domain=main-domain.com
3. systemctl restart dovecot
4. doveadm user cpanel_user