Ingo, I’m sorry, I carelessly and stupidly copied the wrong set of lines from tcpdump.
The tcpdump was performed on the client, this shows a failure from the client to the server showing “TCP(6)” Which I think is the problem. The server is IPv4 only, xinetd specified the flag as “IPv4” and the inbound traffic is IPv4. Sorry for the earlier error. Brian 11:29:40.183354 IP (tos 0xc0, ttl 64, id 11278, offset 0, flags [none], proto ICMP (1), length 80) biowork2.health1.hcom.health.state.ny.us > flower.wadsworth.org: ICMP host biowork2.health1.hcom.health.state.ny.us unreachable - admin prohibited, length 60 IP (tos 0x0, ttl 64, id 9375, offset 0, flags [DF], proto TCP (6), length 52) flower.wadsworth.org.516 > biowork2.health1.hcom.health.state.ny.us.amanda: Flags [S], cksum 0xfc6b (correct), seq 2828866963, win 49640, options [mss 1460,nop,wscale 0,nop,nop,sackOK], length 0 From: Ingo Schaefer <i...@ingo-schaefer.de> Date: Monday, May 14, 2018 at 3:16 PM To: "Cuttler, Brian R (HEALTH)" <brian.cutt...@health.ny.gov>, "amanda-users@amanda.org" <amanda-users@amanda.org> Subject: AW: ipv4 vs ipv6 ATTENTION: This email came from an external source. Do not open attachments or click on links from unknown senders or unexpected emails. 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