Hello Brian,

Your tcpdump Output is just ARP traffic for getting the ethernet address to the IP address.

And according to the length in tcpdump output I would say it is requesting the ethernet address to an IPv4 IP address.

So nothing wrong there.

Regards,
Ingo

Gesendet von meinem BlackBerry 10-Smartphone.
Von: Cuttler, Brian R (HEALTH)
Gesendet: Montag, 14. Mai 2018 17:44
An: amanda-users@amanda.org
Betreff: ipv4 vs ipv6

 

Hello Amanda users,

 

For some reason I’m not seeing much/any Amanda traffic, I did re-register with a new email address last month…

 

Installing Amanda-client on an ununtu system, when I run # amcheck from the server I’m seeing the following in tcpdump output.

 

    flower.wadsworth.org.516 > biowork2.health1.hcom.health.state.ny.us.amanda: Flags [R], cksum 0x3d33 (correct), seq 2828866964, win 49640, length 0

11:29:44.054702 ARP, Ethernet (len 6), IPv4 (len 4), Request who-has flower.wadsworth.org tell biowork2.health1.hcom.health.state.ny.us, length 28

11:29:44.054796 ARP, Ethernet (len 6), IPv4 (len 4), Reply flower.wadsworth.org is-at 00:14:4f:21:10:c2 (oui Unknown), length 46

 

That is, Amanda-client is being activated by IPv4 but responding using IPv6. I know that is mentioned in the mail archives and I have checked, re-installed xinetd on the client and verified flags are IPv4.

 

root@biowork2:/etc/ufw/applications.d# more /etc/xinetd.d/amanda

# default: on

#

# description: Amanda services for Amanda server and client.

#

 

service amanda

{

        disable         = no

        flags           = IPv4

        socket_type     = dgram

        protocol        = udp

        wait            = no

        user            = amandabackup

        group           = disk

        groups          = yes

#        server          = /usr/lib/amanda/amandad

        server          = /usr/lib/x86_64-linux-gnu/amanda/amandad

        server_args     = -auth=bsdtcp amdump amindexd amidxtaped

}

 

Either I’m missing a step or I’m not chasing the correct problem.

 

Any help would be appreciated.

 

Brian

 

Brian Cuttler, Wadsworth Center/NYS Dept of Health

Albany, NY 12201

 


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