Wikipedia:WikiProject User scripts/Scripts/RBL check
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/* This script adds an "RBL check" link to the toolbox on IP user/talk/contribs pages.
Important: Some care is required in interpreting the results of this tool. In particular, some of the RBLs shown on the results page are lists of dial-up and/or broadband user IPs, and will thus include the IPs of most legitimate Wikipedia editors. Others are combined lists that may or may not include dial-up and broadband addresses. Being listed on such RBLs does not mean the IP is an open proxy. In general, before blocking or reporting an IP as a proxy based on an RBL listing, make sure you carefully read the listing criteria for the matching RBLs first.
*/
addOnloadHook(function () {
var addr;
if (wgCanonicalNamespace == "Special" && wgCanonicalSpecialPageName == "Contributions")
addr = document.forms[0].target.value;
else if (wgCanonicalNamespace == "User" || wgCanonicalNamespace == "User_talk")
addr = wgTitle;
if (!/^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$/.test(addr)) return; // not an IP
addPortletLink('p-tb', 'http://www.robtex.com/rbls/'+addr+'.html',
'RBL check', 't-rblcheck', 'Multi-RBL check');
});
//
