Change destination IP

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MRLU
DD-WRT Novice


Joined: 03 Jun 2017
Posts: 3

PostPosted: Tue Jun 11, 2019 19:23    Post subject: Change destination IP Reply with quote
Please forgive me if this question is silly since I am new to this networking using IPTABLES.

I have a ill-behaved ip camera in my network that tries to phone home to a foreign IP address. I would like to know if I can redirect the IP that it is trying to connect to a different IP.

The source IP on my network is 192.168.1.166 and it is trying to connect to 37.49.231.111 on port 80. Can I change the outbound request to something safe such as 127.0.0.1?
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Alozaros
DD-WRT Guru


Joined: 16 Nov 2015
Posts: 2989
Location: UK, London, just across the river..

PostPosted: Tue Jun 11, 2019 22:50    Post subject: Reply with quote
or just cut its WAN and access it only from LAN...
this camera shit is well known on the cheap price cam's
they do a router floods, UDP or TCP and they connect to a unknown IP's silently...

iptables -I FORWARD -i br0 -o $(nvram get wan_iface) -p tcp -s ip of camera -j DROP

ip of camera is your local cam's ip address

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Atheros
TP-Link WR740Nv1 ------DD-WRT 33772 BS WAP/Switch (wired)
TP-Link WR1043NDv2 ----DD-WRT 41459 BS (AP,PPPoE,NAT,AD Blocking,AP Isolation,Firewall,Local DNS,Forced DNS,DoT)
TP-Link WR1043NDv2 ----DD-WRT 41517 BS (AP,NAT,AD Blocking,Firewall,Wi-Fi OFF,Local DNS,Forced DNS,DoT)
TP-Link WR1043NDv2 ----Gargoyle OS 1.11.0 (AP,NAT,QoS,Quotas)
Qualcomm/IPQ8065
2x Netgear R7800 -------DD-WRT 40270M 4.9 Kong (AP,NAT,AD-Blocking,AP&Net Isolation,VLAN's,Firewall,Local DNS,DNSCrypt-proxy v2 x2)
Broadcom
Netgear R7000 -------DD-WRT 40270M Kong (AP,NAT,VLAN,AD-Blocking,Firewall,Local DNS,Forced DNS,DoT)
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