On 06/14/2011 06:51 PM, Tim Dunphy wrote:
> hey guys,
>
> I have a really silly question for you! I just built a cobbler server that
> I am using to bare metal some boxes. But I am a bit n00b and need to figure
> out which ports to open in iptables.
>
> Here's a start:
>
> xinetd 2031 root 8u IPv4 94306
> UDP *:tftp
> in.tftpd 9203 root cwd DIR 253,0 4096
> 588097 /tftpboot
> in.tftpd 9203 root rtd DIR 253,0 4096
> 2 /
> in.tftpd 9203 root txt REG 253,0 39544
> 1813945 /usr/sbin/in.tftpd
> in.tftpd 9203 root mem REG 253,0 139504
> 1698969 /lib64/ld-2.5.so
> in.tftpd 9203 root mem REG 253,0 1722304
> 1698999 /lib64/libc-2.5.so
> in.tftpd 9203 root mem REG 253,0 37368
> 1699127 /lib64/libwrap.so.0.7.6
> in.tftpd 9203 root mem REG 253,0 114352
> 1699014 /lib64/libnsl-2.5.so
> in.tftpd 9203 root mem REG 253,0 53880
> 1698970 /lib64/libnss_files-2.5.so
> in.tftpd 9203 root 0u IPv4 94306
> UDP *:tftp
>
>
>
> I think what I want is the 6th column but I am uncertain of how to express
> that in terms of iptables. Thanks!
tim --
I think the *standard* port for TFTP is 69. You may have configured your
server to use a different port...
Assuming the default INPUT policy on your iptables configuration is
"deny", typing the following at the command prompt, as
root, will insert a rule allowing (and accepting) tftp on port 69:
iptables -I INPUT -p udp --dport 69 -j ACCEPT
...this will enable tftp on port 69 from all network interfaces.
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