I’m sorry – I should have been more clear in what I was looking at.

As a brief summary of the ‘problem’, I see items like this in my logs intermittently (a few times a day):

*** 20(3085) ERROR: <core> [core/tcp_read.c:1531]: tcp_read_req(): bad request, state=7, error=4 buf: GET / HTTP/1.0

parsed: GET / HTTP/1.0

24(3089) ERROR: <core> [core/tcp_read.c:1531]: tcp_read_req(): bad request, state=7, error=4 buf: GET http://clientapi.ipip.net/echo.php?info=20210311155950 HTTP/1.1 Host: clientapi.ipip.net Accept: */* Pragma: no-cache User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) ***

So, this is just (likely) random scanning from the internet. I mostly just want to remove much of this info from my log files. I’m not serving http on this port. The question about $rP was mostly looking to ignore GET, POST, etc., but I understand that this won’t work due to the fact that it’s message parsing that fails. I was just looking for a way to discard and ignore the bad message rather than trying to process it.

Regards,

Ben Kaufman ben.kaufman@altigen.commailto:ben.kaufman@altigen.com Director of Cloud Operations AltiGen Communications, Inc.

From: sr-users sr-users-bounces@lists.kamailio.org On Behalf Of Alex Balashov Sent: Monday, March 8, 2021 3:08 PM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: Re: [SR-Users] Best way to ignore HTTP requests

How would checking $rP help?

Kamailio won’t process HTTP requests on a TCP SIP listener since they lack the SIP/2.0 request line signature.

It’ll process them through xhttp, though. Is that the context in which this is an issue? If so, just expose your xhttp resources via an obscure URL ($hu) and deny anything else.

— Sent from mobile, with due apologies for brevity and errors.

On Mar 8, 2021, at 4:01 PM, Ben Kaufman <ben.kaufman@altigen.commailto:ben.kaufman@altigen.com> wrote:  I’ve set up a server listening on TCP recently, and notice that I’m receiving intermittent, random HTTP requests from the internet. While it would probably be a good idea to enforce a firewall rule to only allow known hosts to communicate, what would be the best way within Kamailio to ignore http requests? Would just checking $rP work?

Regards,

Ben Kaufman ben.kaufman@altigen.commailto:ben.kaufman@altigen.com Director of Cloud Operations AltiGen Communications, Inc.

_______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.orgmailto:sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users

Since the parse failure precedes any operation of the config script on the request—only parsed requests are exposed into the config script—I don’t think there is any way to prevent this.

— Sent from mobile, with due apologies for brevity and errors.

On Mar 11, 2021, at 11:22 AM, Ben Kaufman ben.kaufman@altigen.com wrote:

 I’m sorry – I should have been more clear in what I was looking at.

As a brief summary of the ‘problem’, I see items like this in my logs intermittently (a few times a day):

---

20(3085) ERROR: <core> [core/tcp_read.c:1531]: tcp_read_req(): bad request, state=7, error=4 buf: GET / HTTP/1.0

parsed: GET / HTTP/1.0

24(3089) ERROR: <core> [core/tcp_read.c:1531]: tcp_read_req(): bad request, state=7, error=4 buf: GET http://clientapi.ipip.net/echo.php?info=20210311155950 HTTP/1.1 Host: clientapi.ipip.net Accept: */* Pragma: no-cache User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64)

---

So, this is just (likely) random scanning from the internet. I mostly just want to remove much of this info from my log files. I’m not serving http on this port. The question about $rP was mostly looking to ignore GET, POST, etc., but I understand that this won’t work due to the fact that it’s message parsing that fails. I was just looking for a way to discard and ignore the bad message rather than trying to process it.

Regards,

Ben Kaufman ben.kaufman@altigen.com Director of Cloud Operations AltiGen Communications, Inc.

From: sr-users sr-users-bounces@lists.kamailio.org On Behalf Of Alex Balashov Sent: Monday, March 8, 2021 3:08 PM To: Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org Subject: Re: [SR-Users] Best way to ignore HTTP requests

How would checking $rP help?

Kamailio won’t process HTTP requests on a TCP SIP listener since they lack the SIP/2.0 request line signature.

It’ll process them through xhttp, though. Is that the context in which this is an issue? If so, just expose your xhttp resources via an obscure URL ($hu) and deny anything else.

— Sent from mobile, with due apologies for brevity and errors.

On Mar 8, 2021, at 4:01 PM, Ben Kaufman ben.kaufman@altigen.com wrote:

 I’ve set up a server listening on TCP recently, and notice that I’m receiving intermittent, random HTTP requests from the internet. While it would probably be a good idea to enforce a firewall rule to only allow known hosts to communicate, what would be the best way within Kamailio to ignore http requests? Would just checking $rP work?

Regards,

Ben Kaufman ben.kaufman@altigen.com Director of Cloud Operations AltiGen Communications, Inc.

---

Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users _______________________________________________ Kamailio (SER) - Users Mailing List sr-users@lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users