Re: [Dnsmasq-discuss] tftp: No netascii support

[Simon Kelley]

Άλκης Γεωργόπουλος wrote:

I tried to use dnsmasq in Ubuntu hardy with LTSP (thin clients), to
replace dhcp3-server and tftp and of course to also add dns.

The clients didn't get a necessary file named "lts.conf" because the
script that tried to download it from tftp did:
tftp server
get lts.conf

This is interpreted as a "netascii" transfer and dnsmasq replied
"Unsupported operation" or something like that.
So I had to change this script to:
tftp server
binary
get lts.conf

to force "octet" mode, which is supported, and everything worked like a charm.

So, to make it work out of the box in these situations, please support
"netascii" transfer mode, even if dnsmasq still sends the files as
binary.

Thanks for your great tool,
Alkis Georgopoulos

For anyone interested, the script is
/opt/ltsp/i386/usr/share/initramfs-tools/scripts/ltsp_nbd
and the patched line should be
(echo -e "binary\nget /ltsp/i386/lts.conf"|tftp ${ROOTSERVER} >/dev/null 2>&1)



The next release will (correctly) support netascii.


Cheers,

Simon.

[Dnsmasq-discuss] tftp: No netascii support

[Άλκης Γεωργόπουλος]

I tried to use dnsmasq in Ubuntu hardy with LTSP (thin clients), to
replace dhcp3-server and tftp and of course to also add dns.

The clients didn't get a necessary file named "lts.conf" because the
script that tried to download it from tftp did:
tftp server
get lts.conf

This is interpreted as a "netascii" transfer and dnsmasq replied
"Unsupported operation" or something like that.
So I had to change this script to:
tftp server
binary
get lts.conf

to force "octet" mode, which is supported, and everything worked like a charm.

So, to make it work out of the box in these situations, please support
"netascii" transfer mode, even if dnsmasq still sends the files as
binary.

Thanks for your great tool,
Alkis Georgopoulos

For anyone interested, the script is
/opt/ltsp/i386/usr/share/initramfs-tools/scripts/ltsp_nbd
and the patched line should be
(echo -e "binary\nget /ltsp/i386/lts.conf"|tftp ${ROOTSERVER} >/dev/null 2>&1)

Re: [Dnsmasq-discuss] [Fwd: Re: Long freeze during tomcat start]

[Gilles Espinasse]

Selon Adam Hardy :

> I'm trying to figure out a time-out issue with the Apache Tomcat web server,
> and
> I have dug quite deeply into the issue with the help of the tomcat user
> mailing
> list.
...
>
> I don't have any plans to set up my LAN as an IPv6 network, and I can't find
> any
> tomcat configuration options to tell it not to use IPv6 - have you got any
> tips
> that I could follow to sort this one out?
>
> Thanks
> Adam
>
You could disable IPv6 on various distrib using receipts based on not loading
ipv6 module (google will show some answer, I was not able to retrieve the page
with the various receipt)

With ipv6 disabled, tomcat should not try to use it ;-)


Gilles

[Dnsmasq-discuss] [Fwd: Re: Long freeze during tomcat start]

[Adam Hardy]

I'm trying to figure out a time-out issue with the Apache Tomcat web server, and 
I have dug quite deeply into the issue with the help of the tomcat user mailing 
list.


Apparently my machine's configuration for IPv6 may be causing a connection 
time-out and failure during tomcat's start-up routine. The machine is a gateway 
between the internet and my LAN, running dnsmasq as a DHCP and DNS server.


Tomcat displays a freeze or hang at start-up which I have tracked down to an 
IPv6 system call that times out, as shown by this line from a tomcat strace log:


connect(11, {sa_family=AF_INET6, sin6_port=htons(48669),
 inet_pton(AF_INET6, "::1", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0},
 28) = -1 ETIMEDOUT (Connection timed out)

Tomcat runs fine on a workstation on my LAN. This is my ifconfig -a output from 
the two machines:


Good machine:
eth0  Link encap:Ethernet  HWaddr 00:10:DC:79:FF:8F
  inet addr:192.168.0.234  Bcast:192.168.0.255  Mask:255.255.255.0
  inet6 addr: fe80::210:dcff:fe79:ff8f/64 Scope:Link
  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  RX packets:606692 errors:0 dropped:0 overruns:0 frame:0
  TX packets:598681 errors:0 dropped:0 overruns:0 carrier:0
  collisions:65 txqueuelen:1000
  RX bytes:145074456 (138.3 MiB)  TX bytes:44751878 (42.6 MiB)

loLink encap:Local Loopback
  inet addr:127.0.0.1  Mask:255.0.0.0
  inet6 addr: ::1/128 Scope:Host
  UP LOOPBACK RUNNING  MTU:16436  Metric:1
  RX packets:59645 errors:0 dropped:0 overruns:0 frame:0
  TX packets:59645 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:0
  RX bytes:5125125 (4.8 MiB)  TX bytes:5125125 (4.8 MiB)

Gateway machine (eth1 is LAN, eth2 is internet):
eth1  Link encap:Ethernet  HWaddr 00:18:F3:98:F4:EC
  inet addr:192.168.0.2  Bcast:192.168.0.255  Mask:255.255.255.0
  inet6 addr: fe80::218:f3ff:fe98:f4ec/64 Scope:Link
  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  RX packets:134101 errors:0 dropped:0 overruns:0 frame:0
  TX packets:138909 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:100
  RX bytes:12595060 (12.0 MiB)  TX bytes:53461584 (50.9 MiB)
  Base address:0xbc00 Memory:fe8e-fe90

eth2  Link encap:Ethernet  HWaddr 00:08:54:0A:B1:E7
  inet addr:86.138.125.132  Bcast:86.138.125.132  Mask:255.255.255.255
  inet6 addr: fe80::208:54ff:fe0a:b1e7/64 Scope:Link
  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  RX packets:56889 errors:0 dropped:0 overruns:0 frame:0
  TX packets:50695 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:1000
  RX bytes:42379708 (40.4 MiB)  TX bytes:6543279 (6.2 MiB)
  Interrupt:58 Base address:0xd800

loLink encap:Local Loopback
  inet addr:127.0.0.1  Mask:255.0.0.0
  inet6 addr: ::1/128 Scope:Host
  UP LOOPBACK RUNNING  MTU:16436  Metric:1
  RX packets:3894 errors:0 dropped:0 overruns:0 frame:0
  TX packets:3894 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:0
  RX bytes:236606 (231.0 KiB)  TX bytes:236606 (231.0 KiB)


I don't have any plans to set up my LAN as an IPv6 network, and I can't find any 
tomcat configuration options to tell it not to use IPv6 - have you got any tips 
that I could follow to sort this one out?


Thanks
Adam