I would probably load the xhttp module and then discard those messages there. See the docs of xhttp, though, there's an option that has to be set to accept requests without Content-Length header. Regards, Sebastian ----- Ursprüngliche Mail ----- Von: "Ben Kaufman" &lt;ben.kaufman(a)altigen.com&gt; An: "sr-users" &lt;sr-users(a)lists.kamailio.org&gt; Gesendet: Donnerstag, 11. März 2021 17:19:29 Betreff: Re: [SR-Users] Best way to ignore HTTP requests 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://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 [ mailto:ben.kaufman@altigen.com | ben.kaufman(a)altigen.com ] Director of Cloud Operations AltiGen Communications, Inc. From: sr-users &lt;sr-users-bounces(a)lists.kamailio.org&gt; On Behalf Of Alex Balashov Sent: Monday, March 8, 2021 3:08 PM To: Kamailio (SER) - Users Mailing List &lt;sr-users(a)lists.kamailio.org&gt; 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 < [ mailto:ben.kaufman@altigen.com | ben.kaufman(a)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 [ mailto:ben.kaufman@altigen.com | ben.kaufman(a)altigen.com ] Director of Cloud Operations AltiGen Communications, Inc. _______________________________________________ Kamailio (SER) - Users Mailing List [ mailto:sr-users@lists.kamailio.org | sr-users(a)lists.kamailio.org ] [ https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users | https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users ] _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users