[CentOS] tftpd server S not responding

[Asif Iqbal]

On Wed, Mar 28, 2018 at 9:15 PM, Asif Iqbal <vadud3 at gmail.com> wrote:

>
>
> On Wed, Mar 28, 2018 at 6:25 PM, Steven Tardy <sjt5atra at gmail.com> wrote:
>
>> On Wed, Mar 28, 2018 at 3:16 PM Asif Iqbal <vadud3 at gmail.com> wrote:
>>
>> > It is not respoding to A server which is sending the tftp read request
>> RRQ.
>> >
>> > I do see the RRQ packets coming from A to S, but S never responds back
>> from
>> > a different port Y to A
>> >
>> > So this part is working fine
>> >
>> >
>> >
>> > https://en.wikipedia.org/wiki/Trivial_File_Transfer_Protocol
>> #/media/File:Tftp-rrq.svg
>> >
>> > But I do not see any attempts to even send a data packet back in my
>> packet
>> > capture running on S
>>
>>
>> Are A and S on different IP subnets?
>>
>
> Yes
>
>
>> Does S have a second IP on the SAME subnet as A?
>>
>
> No
>
>
>> Any ASA or other firewalls between the two?
>>
>
>
> Firewall is set to any any between the two. Also internal firewall is down
> Firewall is not seeing any return pkts
>
>
>
>> If so this is expected behavior.
>>
>>
> I was hoping S will at least try to reply to the RRQ pkt with a DATA pkt
> I do not see S is even bothering to try.
>
> A(x) ---- RRQ ---> S(69)   and then I am expecting this S(y) --- DAT 1 -->
> A(x)
>


BTW, If I reverse the role and have S try to send a tftp read request, A
reply back right away
and I do the see the file.



>
> >
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>
>
>
> --
> Asif Iqbal
> PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu
> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
>
>


-- 
Asif Iqbal
PGP Key: 0xE62693C5 KeyServer: pgp.mit.edu
A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?