839.dopa.com Open in urlscan Pro
183.134.218.69 Public Scan

URL:
http://839.dopa.com/
Submission: On May 02 via api (May 2nd 2020, 2:37:29 pm UTC) from US

Summary HTTP 8 Redirects Links 2 Behaviour Indicators

Summary

This website contacted 7 IPs in 2 countries across 5 domains to perform 8 HTTP transactions. The main IP is 183.134.218.69, located in China and belongs to CT-HANGZHOU-IDC No.288,Fu-chun Road, CN. The main domain is 839.dopa.com.

This is the only time 839.dopa.com was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

	IP Address	AS Autonomous System
1	183.134.218.69 183.134.218.69	58461 (CT-HANGZH...) (CT-HANGZHOU-IDC No.288)
1	154.81.85.156 154.81.85.156	134548 (DXTL-HK D...) (DXTL-HK DXTL Tseung Kwan O Service)
1 1	35.212.97.116 35.212.97.116	19527 (GOOGLE-2) (GOOGLE-2)
1	192.229.133.205 192.229.133.205	15133 (EDGECAST) (EDGECAST)
2	101.89.124.234 101.89.124.234	4812 (CHINANET-...) (CHINANET-SH-AP China Telecom (Group))
1	2401:b180:200... 2401:b180:2000:20::27	37963 (CNNIC-ALI...) (CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.)
1 1	198.11.136.24 198.11.136.24	45102 (CNNIC-ALI...) (CNNIC-ALIBABA-US-NET-AP Alibaba (US) Technology Co.)
1	106.11.92.15 106.11.92.15	37963 (CNNIC-ALI...) (CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.)
1	175.6.29.252 175.6.29.252	63835 (CT-HUNAN-...) (CT-HUNAN-CHANGSHA-IDC No.293)
8	7

1 183.134.218.69 (China)

ASN58461 (CT-HANGZHOU-IDC No.288,Fu-chun Road, CN)

839.dopa.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

1 154.81.85.156 (United States)

ASN134548 (DXTL-HK DXTL Tseung Kwan O Service, HK)

a1.dnbizcdn.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

1 35.212.97.116 (Mountain View, United States) 1 redirects

ASN19527 (GOOGLE-2, US)
PTR: 116.97.212.35.bc.googleusercontent.com

ad.linksynergy.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

1 192.229.133.205 (United States)

ASN15133 (EDGECAST, US)

mproxy.banner.linksynergy.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

2 101.89.124.234 (China)

ASN4812 (CHINANET-SH-AP China Telecom (Group), CN)

s19.cnzz.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools
c.cnzz.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

1 2401:b180:2000:20::27 (China)

ASN37963 (CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN)

z8.cnzz.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

1 198.11.136.24 (San Mateo, United States) 1 redirects

ASN45102 (CNNIC-ALIBABA-US-NET-AP Alibaba (US) Technology Co., Ltd., CN)

cnzz.mmstat.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

1 106.11.92.15 (China)

ASN37963 (CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN)

pcookie.cnzz.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

1 175.6.29.252 (China)

ASN63835 (CT-HUNAN-CHANGSHA-IDC No.293,Wanbao Avenue, CN)

icon.cnzz.com	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

	Apex Domain Subdomains	Transfer
5	cnzz.com s19.cnzz.com c.cnzz.com z8.cnzz.com pcookie.cnzz.com icon.cnzz.com	8 KB
2	linksynergy.com 1 redirects ad.linksynergy.com mproxy.banner.linksynergy.com	82 KB
1	mmstat.com 1 redirects cnzz.mmstat.com	606 B
1	dnbizcdn.com a1.dnbizcdn.com
1	dopa.com 839.dopa.com	4 KB
8	5

	Domain	Requested by
1	icon.cnzz.com	839.dopa.com
1	pcookie.cnzz.com	839.dopa.com
1	cnzz.mmstat.com	1 redirects
1	z8.cnzz.com	839.dopa.com
1	c.cnzz.com	s19.cnzz.com
1	s19.cnzz.com	839.dopa.com
1	mproxy.banner.linksynergy.com	839.dopa.com
1	ad.linksynergy.com	1 redirects
1	a1.dnbizcdn.com	839.dopa.com
1	839.dopa.com
8	10

This site contains links to these domains. Also see Links.

Domain
click.linksynergy.com
www.cnzz.com

Subject Issuer	Validity	Valid
*.banner.linksynergy.com DigiCert SHA2 Secure Server CA	`2017-11-03` - `2020-05-21`	3 years	crt.sh

This page contains 1 frames:

Primary Page: http://839.dopa.com/
Frame ID: 606B92B69E93D29B49E0958318B1CE73
Requests: 8 HTTP requests in this frame

Screenshot
Live screenshot

Full Image

Detected technologies

Tengine (Web Servers) Expand

Overall confidence: 100%
Detected patterns

headers server /Tengine/i

Page Statistics

8
Requests

13 %
HTTPS

11 %
IPv6

5
Domains

10
Subdomains

7
IPs

2
Countries

93 kB
Transfer

102 kB
Size

0
Cookies

2 Outgoing links

These are links going to different origins than the main page.

URL: https://click.linksynergy.com/fs-bin/click?id=N3Fl8WZqO0Y&offerid=584883.167&subid=0&type=4

Search URL Search Domain Scan URL

URL: https://www.cnzz.com/stat/website.php?web_id=1273523440

Search URL Search Domain Scan URL

Redirected requests

There were HTTP redirect chains for the following requests:

Request Chain 1

https://ad.linksynergy.com/fs-bin/show?id=N3Fl8WZqO0Y&bids=584883.167&subid=0&type=4&gridnum=0 HTTP 302
https://mproxy.banner.linksynergy.com/fs/banners/43301/43301_9.jpg

Request Chain 5

http://cnzz.mmstat.com/9.gif?abc=1&rnd=910170198 HTTP 302
http://pcookie.cnzz.com/app.gif?&cna=mHM0F3JYVW8CAaXnjiQ5C3DS

8 HTTP transactions
0 data transactions

Method
Protocol Status Resource
Path Size
x-fer Time
Latency Type
MIME-Type IP
Location

GET
H/1.1 200
OK Primary Request / Show response
839.dopa.com/ 7 KB
4 KB 11247ms
10987ms Document
text/html 183.134.218.69
CT-HANGZHOU-IDC N...

General

Check archive.org

Show headers Download Go to

Full URL: http://839.dopa.com/
Protocol: HTTP/1.1
Server: 183.134.218.69 , China, ASN58461 (CT-HANGZHOU-IDC No.288,Fu-chun Road, CN),
Reverse DNS
Software: Tengine/1.4.2 / PHP/5.3.10
Resource Hash: 242965189b48e860c191602e659a8b6d0e7536db3e33cf01f550cdfccc0e6d76

Request headers

Host: 839.dopa.com
Connection: keep-alive
Pragma: no-cache
Cache-Control: no-cache
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Accept-Encoding: gzip, deflate
Accept-Language: en-US
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36

Response headers

Server: Tengine/1.4.2
Date: Sat, 02 May 2020 14:37:02 GMT
Content-Type: text/html;charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Accept-Encoding
X-Powered-By: PHP/5.3.10
Content-Encoding: gzip

GET
H/1.1 404
Not Found caf.js
a1.dnbizcdn.com/js/b/ 0
0 8160ms
445ms Script
text/html 154.81.85.156
DXTL-HK DXTL Tseu...

General

Check archive.org

Show headers Download Go to

Full URL: http://a1.dnbizcdn.com/js/b/caf.js
Requested by: Host: 839.dopa.com
URL: http://839.dopa.com/
Protocol: HTTP/1.1
Server: 154.81.85.156 , United States, ASN134548 (DXTL-HK DXTL Tseung Kwan O Service, HK),
Reverse DNS
Software: /
Resource Hash

Request headers

Referer: http://839.dopa.com/
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36

Response headers

GET
H2

200

43301_9.jpg
mproxy.banner.linksynergy.com/fs/banners/43301/
Redirect Chain

https://ad.linksynergy.com/fs-bin/show?id=N3Fl8WZqO0Y&bids=584883.167&subid=0&type=4&gridnum=0
https://mproxy.banner.linksynergy.com/fs/banners/43301/43301_9.jpg

81 KB
82 KB

553ms
452ms

Image
image/jpeg

192.229.133.205
EDGECAST

General

Check archive.org

Show headers Download Go to Show image

Full URL: https://mproxy.banner.linksynergy.com/fs/banners/43301/43301_9.jpg
Requested by: Host: 839.dopa.com
URL: http://839.dopa.com/
Protocol: H2
Security: TLS 1.3, , AES_256_GCM
Server: 192.229.133.205 , United States, ASN15133 (EDGECAST, US),
Reverse DNS
Software: Apache/2.2.27 (CentOS) /
Resource Hash: 6362befd53c07469fcdbe1a328c19c2fd211a06bc8d15286cf5fcda64a6eccbc

Request headers

Referer: http://839.dopa.com/
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36

Response headers

date: Sat, 02 May 2020 14:50:26 GMT
last-modified: Thu, 21 Mar 2019 06:46:32 GMT
server: Apache/2.2.27 (CentOS)
etag: "30197c-1459a-58495193d6200"
x-cache: HIT
content-type: image/jpeg
status: 200
cache-control: max-age=900
accept-ranges: bytes
content-length: 83354
expires: Sat, 02 May 2020 14:52:03 GMT

Redirect headers

Location: https://mproxy.banner.linksynergy.com/fs/banners/43301/43301_9.jpg
Date: Sat, 02 May 2020 14:37:03 GMT
P3P: policyref="/w3c/p3p.xml", CP="NOI DSP COR CURa ADMa DEVa OUR BUS STA"
Connection: close, close
Content-Type: text/html;charset=utf-8
Content-Length: 89
Expires: Sat, 02 May 2020 15:37:03 GMT

GET
H/1.1 200
OK z_stat.php Show response
s19.cnzz.com/ 12 KB
5 KB 608ms
522ms Script
application/javascript 101.89.124.234
CHINANET-SH-AP Ch...

General

Check archive.org

Show headers Download Go to

Full URL: http://s19.cnzz.com/z_stat.php?id=1273523440&show=pic
Requested by: Host: 839.dopa.com
URL: http://839.dopa.com/
Protocol: HTTP/1.1
Server: 101.89.124.234 , China, ASN4812 (CHINANET-SH-AP China Telecom (Group), CN),
Reverse DNS
Software: Tengine / PHP/5.5.25
Resource Hash: 6aa898d3561d7e20f9246898b15b44d43fd2f52db0dba8ed91e017e9030e2e0b

Request headers

Referer: http://839.dopa.com/
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36
Intervention: <https://www.chromestatus.com/feature/5718547946799104>; level="warning"

Response headers

Date: Sat, 02 May 2020 14:37:11 GMT
Content-Encoding: gzip
X-Swift-CacheTime: 5400
X-Powered-By: PHP/5.5.25
Transfer-Encoding: chunked
X-Cache: MISS TCP_REFRESH_MISS dirn:12:781009880
Connection: keep-alive
Last-Modified: Sat, 02 May 2020 14:37:11 GMT
Server: Tengine
Vary: Accept-Encoding
Ali-Swift-Global-Savetime: 1588430231
Content-Type: application/javascript
Via: cache29.l2cn1807[54,200-0,M], cache39.l2cn1807[56,0], cache5.cn1401[62,200-0,M], cache17.cn1401[63,0]
Cache-Control: max-age=5400,s-maxage=5400
Timing-Allow-Origin: *
EagleId: 65597c2515884302314345299e
X-Swift-SaveTime: Sat, 02 May 2020 14:37:11 GMT

GET
H/1.1 200
OK core.php Show response
c.cnzz.com/ 971 B
1 KB 740ms
703ms Script
application/javascript 101.89.124.234
CHINANET-SH-AP Ch...

General

Check archive.org

Show headers Download Go to

Full URL: http://c.cnzz.com/core.php?web_id=1273523440&show=pic&t=z
Requested by: Host: s19.cnzz.com
URL: http://s19.cnzz.com/z_stat.php?id=1273523440&show=pic
Protocol: HTTP/1.1
Server: 101.89.124.234 , China, ASN4812 (CHINANET-SH-AP China Telecom (Group), CN),
Reverse DNS
Software: Tengine / PHP/5.5.25
Resource Hash: ed5d17831487545172f572224acfc0744b8624dcd0a2eab9404dca816d2e5839

Request headers

Referer: http://839.dopa.com/
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36
Intervention: <https://www.chromestatus.com/feature/5718547946799104>; level="warning"

Response headers

Date: Sat, 02 May 2020 14:37:12 GMT
Content-Encoding: gzip
X-Swift-CacheTime: 900
X-Powered-By: PHP/5.5.25
X-Cache: MISS TCP_REFRESH_MISS dirn:3:476309360
X-Swift-SaveTime: Sat, 02 May 2020 14:37:12 GMT
Content-Length: 618
Last-Modified: Sat, 02 May 2020 14:37:12 GMT
Server: Tengine
Vary: Accept-Encoding
Ali-Swift-Global-Savetime: 1588430232
Content-Type: application/javascript
Via: cache41.l2cn1807[47,200-0,M], cache33.l2cn1807[49,0], cache19.cn1401[56,200-0,M], cache20.cn1401[212,0]
Connection: keep-alive
Timing-Allow-Origin: *
EagleId: 65597c2815884302320363059e
Expires: Sat, 02 May 2020 14:52:12 GMT

GET
H/1.1 200
OK stat.htm
z8.cnzz.com/ 2 B
245 B 681ms
341ms Image
text/html 2401:b180:2000:20::27
CNNIC-ALIBABA-CN-...

General

Check archive.org

Show headers Download Go to Show image

Full URL: http://z8.cnzz.com/stat.htm?id=1273523440&r=&lg=en-us&ntime=none&cnzz_eid=1393265183-1588430231-&showp=1600x1200&p=http%3A%2F%2F839.dopa.com%2F&t=Empower%20Your%20Business%20Growth%20in%202019.%20De...&umuuid=171d5d1d852316-0922ca0f381ce1-37647e03-1d4c00-171d5d1d853816&h=1&rnd=1830346389
Requested by: Host: 839.dopa.com
URL: http://839.dopa.com/
Protocol: HTTP/1.1
Server: 2401:b180:2000:20::27 , China, ASN37963 (CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN),
Reverse DNS
Software: Tengine /
Resource Hash: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

Request headers

Referer: http://839.dopa.com/
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36

Response headers

Date: Sat, 02 May 2020 14:37:12 GMT
Content-Encoding: gzip
Transfer-Encoding: chunked
Server: Tengine
Connection: keep-alive
Vary: Accept-Encoding
Content-Type: text/html; charset=utf-8

GET
H/1.1

200
OK

app.gif
pcookie.cnzz.com/
Redirect Chain

http://cnzz.mmstat.com/9.gif?abc=1&rnd=910170198
http://pcookie.cnzz.com/app.gif?&cna=mHM0F3JYVW8CAaXnjiQ5C3DS

43 B
420 B

461ms
427ms

Image
image/gif

106.11.92.15
CNNIC-ALIBABA-CN-...

General

Check archive.org

Show headers Download Go to Show image

Full URL: http://pcookie.cnzz.com/app.gif?&cna=mHM0F3JYVW8CAaXnjiQ5C3DS
Requested by: Host: 839.dopa.com
URL: http://839.dopa.com/
Protocol: HTTP/1.1
Server: 106.11.92.15 , China, ASN37963 (CNNIC-ALIBABA-CN-NET-AP Hangzhou Alibaba Advertising Co.,Ltd., CN),
Reverse DNS
Software: /
Resource Hash: cf4724b2f736ed1a0ae6bc28f1ead963d9cd2c1fd87b6ef32e7799fc1c5c8bda

Request headers

Referer: http://839.dopa.com/
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36

Response headers

Pragma: no-cache
Date: Sat, 02 May 2020 14:37:13 GMT
P3P: CP="NOI DSP COR CURa ADMa DEVa PSAa PSDa OUR IND UNI PUR NAV"
Cache-Control: no-cache
Connection: close
Content-Type: image/gif
Content-Length: 43
Expires: Thu, 01 Jan 1970 00:00:01 GMT

Redirect headers

Pragma: no-cache
Date: Sat, 02 May 2020 14:37:12 GMT
P3P: CP="NOI DSP COR CURa ADMa DEVa PSAa PSDa OUR IND UNI PUR NAV"
Location: http://pcookie.cnzz.com/app.gif?&cna=mHM0F3JYVW8CAaXnjiQ5C3DS
Cache-Control: no-cache
Connection: close
Content-Type: image/gif
Content-Length: 43
Expires: Thu, 01 Jan 1970 00:00:01 GMT

GET
H/1.1 200
OK pic.gif
icon.cnzz.com/img/ 719 B
1 KB 602ms
456ms Image
image/gif 175.6.29.252
CT-HUNAN-CHANGSHA...

General

Check archive.org

Show headers Download Go to Show image

Full URL

http://icon.cnzz.com/img/pic.gif

Requested by

Host: 839.dopa.com
URL: http://839.dopa.com/

Protocol

HTTP/1.1

Server

175.6.29.252 , China, ASN63835 (CT-HUNAN-CHANGSHA-IDC No.293,Wanbao Avenue, CN),

Reverse DNS

Software

Tengine /

Resource Hash

98a4ab97e12555ab969012d151a578dae7a3b8699d202485fcf8116e55497735

Security Headers

Name	Value
Strict-Transport-Security	max-age=31536000

Request headers

Referer: http://839.dopa.com/
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36

Response headers

Date: Sat, 02 May 2020 13:36:14 GMT
Via: cache4.l2em21-1[0,304-0,H], cache27.l2em21-1[1,0], cache5.cn1414[0,200-0,H], cache16.cn1414[2,0]
EagleEye-TraceId: 74fd1d1c15884265740007997e
Age: 3658
X-Cache: HIT TCP_MEM_HIT dirn:13:748425889
X-Swift-CacheTime: 3600
Connection: keep-alive
Content-Length: 719
Last-Modified: Thu, 05 Sep 2019 02:16:52 GMT
Server: Tengine
ETag: "5d707014-2cf"
Strict-Transport-Security: max-age=31536000
Ali-Swift-Global-Savetime: 1588072202
Content-Type: image/gif
Accept-Ranges: bytes
Timing-Allow-Origin: *, *
EagleId: af061da415884302329027054e
X-Swift-SaveTime: Sat, 02 May 2020 14:10:02 GMT

Verdicts & Comments Add Verdict or Comment

17 JavaScript Global Variables

These are the non-standard "global" variables defined on the window object. These can be helpful in identifying possible client-side frameworks and code.

0 Cookies

Cookies are little pieces of information stored in the browser of a user. Whenever a user visits the site again, he will also send his cookie values, thus allowing the website to re-identify him even if he changed locations. This is how permanent logins work.

Indicators

This is a term in the security industry to describe indicators such as IPs, Domains, Hashes, etc. This does not imply that any of these indicate malicious activity.

839.dopa.com
a1.dnbizcdn.com
ad.linksynergy.com
c.cnzz.com
cnzz.mmstat.com
icon.cnzz.com
mproxy.banner.linksynergy.com
pcookie.cnzz.com
s19.cnzz.com
z8.cnzz.com
101.89.124.234
106.11.92.15
154.81.85.156
175.6.29.252
183.134.218.69
192.229.133.205
198.11.136.24
2401:b180:2000:20::27
35.212.97.116
242965189b48e860c191602e659a8b6d0e7536db3e33cf01f550cdfccc0e6d76
6362befd53c07469fcdbe1a328c19c2fd211a06bc8d15286cf5fcda64a6eccbc
6aa898d3561d7e20f9246898b15b44d43fd2f52db0dba8ed91e017e9030e2e0b
98a4ab97e12555ab969012d151a578dae7a3b8699d202485fcf8116e55497735
cf4724b2f736ed1a0ae6bc28f1ead963d9cd2c1fd87b6ef32e7799fc1c5c8bda
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
ed5d17831487545172f572224acfc0744b8624dcd0a2eab9404dca816d2e5839

839.dopa.com Open in urlscan Pro 183.134.218.69 Public Scan

Summary

urlscan.io Verdict: No classification

Domain & IP information

Screenshot Live screenshot Full Image

Detected technologies

Page Statistics

8 Requests

13 %HTTPS

11 %IPv6

5 Domains

10 Subdomains

7 IPs

2 Countries

93 kBTransfer

102 kBSize

0 Cookies

2 Outgoing links

Redirected requests

8 HTTP transactions Everything HTML Script AJAX CSS Image Expand all 0 data transactions

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Redirect headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Redirect headers

Request headers

Response headers

Verdicts & Comments Add Verdict or Comment

17 JavaScript Global Variables

0 Cookies

Indicators

839.dopa.com Open in urlscan Pro
183.134.218.69 Public Scan

Screenshot
Live screenshot

Full Image

8
Requests

13 %
HTTPS

11 %
IPv6

5
Domains

10
Subdomains

7
IPs

2
Countries

93 kB
Transfer

102 kB
Size

0
Cookies

8 HTTP transactions
0 data transactions