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fedora-users: Re: Getting timeouts on TFTP on F15 as well as F14

Re: Getting timeouts on TFTP on F15 as well as F14

From: Aaron Gray <aaronngray.lists_at_nospam>
Date: Mon Oct 10 2011 - 20:35:35 GMT
To: Frantisek Hanzlik <franta@hanzlici.cz>

On 10 October 2011 20:25, Frantisek Hanzlik <franta@hanzlici.cz> wrote:

> Aaron Gray wrote:
> > I am getting timeouts on TFTP on F15,
> >
> > Aaron
>
> You should check at server side:
>
> 1) if tftp service is enabled:
> # chkconfig --list tftp
>
> Note: This output shows SysV services only and does not include native
> systemd services. SysV configuration data might be overridden by
> native
> systemd configuration.
>
> tftp on
>
>
Okay

>
> 2) if xinetd daemon is running (also "service xinetd status"):
> # systemctl status xinetd.service
> xinetd.service - LSB: start and stop xinetd
> Loaded: loaded (/etc/rc.d/init.d/xinetd)
> Active: active (running) since Wed, 21 Sep 2011 04:46:34 +0200; 2
> weeks and 5 days ago
> Main PID: 1908 (xinetd)
> CGroup: name=systemd:/system/xinetd.service
> └ 1908 xinetd -stayalive -pidfile /var/run/xinetd.pid
>
>
> Okay

> 3) /etc/hosts.allow (if You use hosts.allow/hosts.deny) should contain:
> ...
> # we allow access from 192.168.1.0/24 :
> in.tftpd: 192.168.1.0/255.255.255.0
> ...
>
> Added makes no difference

>
> 4) if You use firewall (iptables), You should load nf_conntrack_tftp
> module,
> for tracking ephemeral ports. That means /etc/sysconfig/iptables-config
> should
> contain line as:
> ...
> IPTABLES_MODULES="nf_conntrack_tftp"
> ...
> (other module is for NATting tftp connection)
>
>
using localhost

>
> 5) /var/log/messages should contain entries as:
> Oct 10 20:28:32 ns xinetd[1908]: START: tftp pid=5315 from=192.168.1.22
> Oct 10 20:28:42 ns xinetd[1908]: EXIT: tftp status=0 pid=5315
> duration=10(sec)
>

Oct 10 21:09:07 gold xinetd[13402]: Exiting...
Oct 10 21:09:12 gold xinetd[13650]: xinetd Version 2.3.14 started with
libwrap loadavg labeled-networking options compiled in.
Oct 10 21:09:12 gold xinetd[13650]: Started working: 1 available service

is all I am getting in messages

Checked tfpt is the only one enabled

>
>
> 6) tcpdump on relevant interface (here eth0) should display traffic,
> at minimal incomming packet:
> # tcpdump -i eth0 -l -nn udp port 69
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on eth0, link-type EN10MB (Ethernet), capture size 65535 bytes
> 20:43:13.612200 IP 192.168.1.22.58949 > 192.168.1.254.69: 17 RRQ "b.log"
> netascii
>
>
[root@xxxxx /]# tcpdump -i em1 -l -nn udp port 69
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on em1, link-type EN10MB (Ethernet), capture size 65535 bytes
21:33:08.653033 IP 192.168.0.5.47352 > 192.168.0.4.69: 19 RRQ "vmlinuz"
netascii
21:33:13.653306 IP 192.168.0.5.47352 > 192.168.0.4.69: 19 RRQ "vmlinuz"
netascii
21:33:18.653565 IP 192.168.0.5.47352 > 192.168.0.4.69: 19 RRQ "vmlinuz"
netascii
21:33:23.653963 IP 192.168.0.5.47352 > 192.168.0.4.69: 19 RRQ "vmlinuz"
netascii
21:33:28.654212 IP 192.168.0.5.47352 > 192.168.0.4.69: 19 RRQ "vmlinuz"
netascii
^C
5 packets captured
5 packets received by filter
0 packets dropped by kernel

Well thats it I am stumped tftp seem to be running but ignoring requests

Aaron

>
> Best, Franta
>

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