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1,746 views 5 comments
by anonymous
Hi Folks,  I have not yet purchased an RUT955 and before I do I wanted to make sure that this product does not implement SIP-ALG.  I want to use the RUT955 as broadband link for my office which has 3CX PBX.  The PBX does not operate behind router with SIP-ALG enabled in it.  Can anyone confirm that there is no SIP-ALG in this product?  TIA.

1 Answer

0 votes
by anonymous
Hi,

As our routers based on OpenWRT - it does not have it.

EB.
Best answer
by anonymous
Thank you for the timely response.
by anonymous
We do have helpers though, which could make your system show that it has SIP-ALG enabled. But those can be disabled or even removed with simple commands. So no worries there.

EB.
by anonymous

I am having issues with SIP. The conntrack netfilter is dropping SIP packets.

[  321.741365] nf_ct_sip: dropping packet: all ports in use for SDP media IN= OUT= SRC=10.13.179.* DST=77.240.*.* LEN=968 TOS=0x08 PREC=0x60 TTL=63 ID=15651 PROTO=UDP SPT=6061 DPT=5060 LEN=948

What is the command to disable this helper, and also to re-enable it in case I need to?

by anonymous

Seems I only have 2 'nathelper' packages:

root@network:~# opkg list-installed | grep nathelper
kmod-nf-nathelper - 5.4.147-1
kmod-nf-nathelper-extra - 5.4.147-1

Shall I remove kmod-nf-nathelper-extra to get rid of this sip helper? 

PS looks like in this version, extra includes the h323 & sip helper (https://openwrt.org/packages/pkgdata/kmod-nf-nathelper-extra)