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Old 08-19-2019, 10:02 AM   #1
empbilly
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debian server changeing ip in static mode


Hello,

I have a fileserver configured on a debian 9.9. This is not always the case, but sometimes the server changes IP, and the configuration in /etc/network/interfaces is static. I already disabled services that could potentially change the IP.

- The server is an xenserver VM;
- The "vlan" that the server is part of does not have DHCP enabled;
- In xenserver already changed the MAC a few times, because it could, I don't know, have a static DHCP configured;

The IP configured as static is: 10.10.10.7 (example ip)
The last IP that the server got automatically was: 10.10.10.88 (example ip)


Any idea?
 
Old 08-19-2019, 05:11 PM   #2
berndbausch
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Does it change its address when you restart it or while it's running?

In any case, what do you find in the log files? You could do a brute force search, e.g. journalctl | grep 10.10.10.88 or grep -r 10.10.10.88 /var/log. Also log files on the Xen server.
 
Old 08-19-2019, 08:27 PM   #3
permaroot
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Quote:
Originally Posted by empbilly View Post
Hello,

I have a fileserver configured on a debian 9.9. This is not always the case, but sometimes the server changes IP, and the configuration in /etc/network/interfaces is static. I already disabled services that could potentially change the IP.

- The server is an xenserver VM;
- The "vlan" that the server is part of does not have DHCP enabled;
- In xenserver already changed the MAC a few times, because it could, I don't know, have a static DHCP configured;

The IP configured as static is: 10.10.10.7 (example ip)
The last IP that the server got automatically was: 10.10.10.88 (example ip)


Any idea?
Are there any other machines on that VLAN? Do they get assigned random IPs when set as static? What’s handling vlan tagging?
 
  


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