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RFC3315 says:
"
The client SHOULD perform duplicate address detection [17] on each of
the addresses in any IAs it receives in the Reply message before
using that address for traffic. If any of the addresses are found to
be in use on the link, the client sends a Decline message to the
server as described in section 18.1.7.
"
But the dhclient on my PC assign duplicated address.
Wireshark shows that there is no DAD check.
How it supposed to work? Did I miss some magic option?
The original source code from ISC does not support such requirement for IPv6.
But, it was fixed in Fedora in 2010. See http://www.mirrorservice.org/sites/dl.fedoraproject.org/pub/fedora/linux/releases/20/Fedora/source/SRPMS/d/
But this patch has a bug. It uses ALL options from REQUEST to send DECLINE, however RFC3315 says no Rapid_Commit and no Reconf options.
Be careful.
Main idea is to check leased IP for duplication in dhclient-script. If the IP is duplicated script should return 3 otherwise 0.
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Closed 21 hours ago.
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There is a tp-link archer c5 v4 router, converted to openwrt. I want to set up a SSID , so that when connected, a certain web page opens from the Internet, at a given URL (for advertising purposes). Please advise how this can be implemented.
Dont know how to setup captive portal at openwrt on tp-link
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Closed 3 years ago.
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I have several websites on the same server (debian). I receive all "Undelivered Mail Returned to Sender" notification on a unique mail adress (I use postfix). How to have different destination adress for each domain ?
I think the solution is to create multiple users and associate each domain with one user and each user with one email.
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I am trying to remotely access a virtual box remotely. Because this is a virtualbox hosted on a windows machine, it does not have it's own IP address to use for SSH login. I have tried changing the network settings to Bridge Adapter to get an IP, but nothing has worked. Are there some steps I am missing, or what else can I do to SSH into the box? Thanks.
If you were using the NAT mode before and you have no reason to change it other then the SSH, you can do it in that mode. Just expand the advanced settings in the network configuration and create a port forwarding rule for the port 22. Then you will be able to SSH to the VM by using the host's ip address.
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I am trying to connect to a mainframe from linux server using sftp command and execute a SITE command and transfer file to mainframe, but it is failing and showing Invalid command.
I am using batch operation mode as sftp -b $batch_file user#remote_user.
There is no equivalent of FTP's SITE command in SFTP. SFTP uses a binary format for its protocol messages, and uses specific request numbers (or IDs) to indicate the desired operation. And SFTP does not define any request number/ID for "execute this string as a command". SSH can be used for that sort of thing, but not SFTP.
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I'm working on a network with many Linux machines.
In one of them I have a file that I suspect was pushed by another machine.
The machines can access each other using ssh connections.
Is there anyway I can tell which machine pushed the file?
I tried looking for ssh logs but the /var/log/secure/ directory doesn't exist.
Depending on the distro and your logging settings, you may have some luck with /log/auth.
Try grep sshd /var/log/auth.log
Depends on your distro, you can check following files from your distro.
/var/log/secure
/var/log/auth.log
/var/log/syslog
/var/log/daemon.log