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 sipvicious bruteforce, Some service eating up bandwidth of my VPS (4 Replies, Read 2413 times)
Waqass
Group: Member
Post Group: Newbie
Posts: 12
Status:
on any vps I run i get the following output which is originated from an ip 45.95.147.20 related to my data center but not of my server. Its eating the bandwidth of vps even if a new one is created. I don't know how it is running on each vps. Is it possible to cater this issue as my clients are suffering because of this.


Code
# tcpdump -nN -evv
tcpdump: listening on eth0, link-type EN10MB (Ethernet), capture size 262144 bytes
17:04:46.438802 d0:50:99:de:94:33 > 01:00:5e:62:78:90, ethertype IPv4 (0x0800), length 453: (tos 0x0, ttl 1, id 1957, offset 0, flags [DF], proto UDP (17), length 439)
45.95.147.20.5136 > 231.98.120.144.5060: [udp sum ok] SIP, length: 411
OPTIONS sip:100@231.98.120.144 SIP/2.0
Via: SIP/2.0/UDP 45.95.147.20:5136;branch=z9hG4bK-1351314940;rport
Content-Length: 0
From: "sipvicious"<sip:100@1.1.1.1>;tag=6537363237383930313363340131333530383631363336
Accept: application/sdp
User-Agent: friendly-scanner
To: "sipvicious"<sip:100@1.1.1.1>
Contact: sip:100@45.95.147.20:5136
CSeq: 1 OPTIONS
Call-ID: 3014767519076859219606
Max-Forwards: 70

17:04:46.439007 d0:50:99:de:94:33 > 01:00:5e:62:7e:b9, ethertype IPv4 (0x0800), length 455: (tos 0x0, ttl 1, id 45206, offset 0, flags [DF], proto UDP (17), length 441)
45.95.147.20.5190 > 235.98.126.185.5060: [udp sum ok] SIP, length: 413
OPTIONS sip:100@235.98.126.185 SIP/2.0
Via: SIP/2.0/UDP 45.95.147.20:5190;branch=z9hG4bK-3065124847;rport
Content-Length: 0
From: "sipvicious"<sip:100@1.1.1.1>;tag=6562363237656239313363340133383938323130333232
Accept: application/sdp
User-Agent: friendly-scanner
To: "sipvicious"<sip:100@1.1.1.1>
Contact: sip:100@45.95.147.20:5190
CSeq: 1 OPTIONS
Call-ID: 398773426030643555343632
Max-Forwards: 70

17:04:46.440089 d0:50:99:de:94:33 > 01:00:5e:62:7d:6d, ethertype IPv4 (0x0800), length 452: (tos 0x0, ttl 1, id 15640, offset 0, flags [DF], proto UDP (17), length 438)
45.95.147.20.5258 > 224.98.125.109.5060: [udp sum ok] SIP, length: 410
OPTIONS sip:100@224.98.125.109 SIP/2.0
Via: SIP/2.0/UDP 45.95.147.20:5258;branch=z9hG4bK-35424907;rport
Content-Length: 0
From: "sipvicious"<sip:100@1.1.1.1>;tag=65303632376436643133633401393634343030333632
Accept: application/sdp
User-Agent: friendly-scanner
To: "sipvicious"<sip:100@1.1.1.1>
Contact: sip:100@45.95.147.20:5258
CSeq: 1 OPTIONS
Call-ID: 1157893217749774267348757
Max-Forwards: 70

17:04:46.440097 d0:50:99:de:94:33 > 01:00:5e:62:6a:0f, ethertype IPv4 (0x0800), length 451: (tos 0x0, ttl 1, id 22857, offset 0, flags [DF], proto UDP (17), length 437)
45.95.147.20.5211 > 227.98.106.15.5060: [udp sum ok] SIP, length: 409
OPTIONS sip:100@227.98.106.15 SIP/2.0
Via: SIP/2.0/UDP 45.95.147.20:5211;branch=z9hG4bK-333274933;rport
Content-Length: 0
From: "sipvicious"<sip:100@1.1.1.1>;tag=65333632366130663133633401373530363936303131
Accept: application/sdp
User-Agent: friendly-scanner
To: "sipvicious"<sip:100@1.1.1.1>
Contact: sip:100@45.95.147.20:5211
CSeq: 1 OPTIONS
Call-ID: 948505290613103069112209
Max-Forwards: 70

17:04:46.440461 d0:50:99:de:94:33 > 01:00:5e:62:7f:8c, ethertype IPv4 (0x0800), length 456: (tos 0x0, ttl 1, id 11361, offset 0, flags [DF], proto UDP (17), length 442)
45.95.147.20.5294 > 230.98.127.140.5060: [udp sum ok] SIP, length: 414
OPTIONS sip:100@230.98.127.140 SIP/2.0
Via: SIP/2.0/UDP 45.95.147.20:5294;branch=z9hG4bK-3225388521;rport
Content-Length: 0
From: "sipvicious"<sip:100@1.1.1.1>;tag=6536363237663863313363340134303035383937393534
Accept: application/sdp
User-Agent: friendly-scanner
To: "sipvicious"<sip:100@1.1.1.1>
Contact: sip:100@45.95.147.20:5294
CSeq: 1 OPTIONS
Call-ID: 1190968937188361579917431
Max-Forwards: 70
IP: --   

sipvicious bruteforce
wolke
Group: NOC
Post Group: Elite Member
Posts: 418
Status:
If you are running a pbx on your vps, it´s very normal to get this type of connections. It´s like guessing FTP logins but for telephone systems. Your pbx should handle these attacks accordingly.
If you are concerned, you may block this IP in IPTABLES.

Edited by wolke : September 22, 2021, 1:41 pm
IP: --   

sipvicious bruteforce
Waqass
Group: Member
Post Group: Newbie
Posts: 12
Status:
Thanks for response but the iptables services is not loaded so I installed it using
yum -y install epel-release
yum install iptables-services -y

and upon enabling it all the vps goes down including the virtualizor panel. The builtin firewalld is also behaving in the same manner.
IP: --   

sipvicious bruteforce
wolke
Group: NOC
Post Group: Elite Member
Posts: 418
Status:
You should install a firewall application like csf on your pbx. That makes configuration of firewall rules (including Virtualizor Ports etc.) very easy. You can of course also set the required rules manually with iptables. But on a pbx, I would highly suggest having a working firewall & intrusion detection.
IP: --   

sipvicious bruteforce
Waqass
Group: Member
Post Group: Newbie
Posts: 12
Status:
I am not running pbx...maybe someone else in the datacenter whonis scanning the ports. Ill try to run firewall today but I am not sure enabling vietualizor ports will not hinder my vpses connectivity.
IP: --   

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