Re: [edk2-devel] TCP Port for ISCSI Connection

["Maciej Rabeda" <maciej.rabeda@linux.intel.com>]

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Siva,

iSCSI targets can be configured to listen on any TCP port.
Changing the UEFI iSCSI Client's TargetPort min/max will effectively 
prevent the user from communicating with the targets configured to 
listen on ports outside that range (in your example: below 1024).
I do not see a reason behind removing that flexibility. If user sets 
iSCSI target and client ports to values shared by other services, it is 
that user's mistake.

Thanks,
Maciej

On 01-Sep-20 16:31, Sivaraman Nainar wrote:
>
> Hello Maciej:
>
> The ports numbers from 0 to 1023 are having specific roles.
>
> Ex: 80 for HTTTP, 443 for HTTPS.
>
> In the case can we set Min as 1024 and Max as 65535.
>
> Thanks
>
> Siva
>
> *From:* devel@edk2.groups.io [mailto:devel@edk2.groups.io] *On Behalf 
> Of *Maciej Rabeda
> *Sent:* Tuesday, September 1, 2020 7:32 PM
> *To:* devel@edk2.groups.io; Sivaraman Nainar
> *Subject:* Re: [edk2-devel] TCP Port for ISCSI Connection
>
> Hi Siva,
>
> What seems to be the problem at hand? What kind of range of values for 
> TargetPort do you propose?
> TARGET_PORT_MIN/MAX_NUM refer to a range of values (0-65535) that be 
> set in TargetPort field in iSCSI HII. 3260 is a default TCP port for 
> iSCSI.
> I see nothing wrong with that.
>
> Thanks,
> Maciej
>
> On 31-Aug-20 11:05, Sivaraman Nainar wrote:
>
>     Rabeda:
>
>     Could you please provide your comment on this.
>
>     -Siva
>
>     *From:* Sivaraman Nainar
>     *Sent:* Tuesday, July 28, 2020 12:15 PM
>     *To:* jiaxin.wu@intel.com <mailto:jiaxin.wu@intel.com>
>     *Cc:* devel@edk2.groups.io <mailto:devel@edk2.groups.io>
>     *Subject:* RE: TCP Port for ISCSI Connection
>
>     Jiaxin:
>
>     Can you please comment on the below query.
>
>     -Siva
>
>     *From:* devel@edk2.groups.io <mailto:devel@edk2.groups.io>
>     [mailto:devel@edk2.groups.io] *On Behalf Of *Sivaraman Nainar
>     *Sent:* Friday, July 17, 2020 5:39 PM
>     *To:* devel@edk2.groups.io <mailto:devel@edk2.groups.io>
>     *Cc:* jiaxin.wu@intel.com <mailto:jiaxin.wu@intel.com>
>     *Subject:* [edk2-devel] Reg: TCP Port for ISCSI Connection
>
>     Hello all:
>
>     In the ISCSI driver, Target TCP Port Input shows the default port
>     as 3260. Which can be set from 0 to 65535
>
>     As per below RFC it talks about the Default Port only. Still it
>     not clearly said if we can use the numbers 49152-65535 which is
>     reserved.
>
>     https://tools.ietf.org/html/rfc3720
>
>     13. IANA Considerations
>
>     This section conforms to [RFC2434].
>
>     The well-known user TCP port number for iSCSI connections assigned by
>     IANA is 3260 and this is the default iSCSI port. Implementations
>     needing a system TCP port number may use port 860, the port assigned
>     by IANA as the iSCSI system port; however in order to use port 860,
>     it MUST be explicitly specified - implementations MUST NOT default to
>     use of port 860, as 3260 is the only allowed default.
>
>     with my understanding, it wouid be good if we can change the below
>     Min and  MAX port number ranges with right ranges.
>
>     #define TARGET_PORT_MIN_NUM       0
>
>     #define TARGET_PORT_MAX_NUM       65535
>
>     Thanks
>
>     Siva
>
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>


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