jema
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Ubuntu ftp problemI have just rebooted my Linux box, new kernel and other bits have automatically gone in.
A couple of minutes before the reboot I was cheerfully using my ftp scripts....
following the reboot I can't ftp anywhere unless I use "ftp -p" to force a passive connection  Okay that is not the end of the world, but I don't get it and I have a score of scripts that will need changing.
What could have happened?
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vegplot
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Sounds like a firewall issue to me. Does your Linux box have a built in firewall as part of the OS which may have had its rules altered after the update?
| Quote: | | In passive mode FTP the client initiates both connections to the server, solving the problem of firewalls filtering the incoming data port connection to the client from the server. |
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jema
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All iptables is showing is:
| Code: |
Chain INPUT (policy ACCEPT)
target prot opt source destination
Chain FORWARD (policy ACCEPT)
target prot opt source destination
Chain OUTPUT (policy ACCEPT)
target prot opt source destination
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webmin does not seem to find a firewall 
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vegplot
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I know nothing about Linux internals so not much help in trying to go any deeper into the problem, sorry. It does sound like a port blocking issue though as I can't think of anything else it could be, not unless your connection ISP has changed things by coincidence but I'd find that hard to beleive.
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jema
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My suspicion is that it is something about the network interfaces.
I run a lot of "virtual" interfaces so sites like my local copy of downsizer can be on their own virtual ip.
Normally following a reboot these have been problematic in that not all of the interfaces come up automatically. This time round they all have, maybe ftp has got itself confused about the incoming address somehow
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