egghelp/eggheads community

Does a ban tcl exist that works correctly on Unreal IRCD?

2002-12-18T04:06:30-04:00

Very true.

Take the following example.

Back when I used a regular ISP, each time I connected, I obtained a new host each time. Example between a masked and non-masked network would be

first time:
user231-host12.dungate.du3.isp.com

encoded:
8G5GAF1.5A13FC1.isp.com

second time:
user112-host17.friday.du3.isp.com

encoded:
4DA16F1.AB61521.isp.com

Regardless how many times I connected, if I had the first host, then I would get exactly the encoded part above.

Same applied with the second host.

If banning *!*@user231-host12.dungate.du3.isp.com, the it would fail to porevent my second host from joining. SO a broad ban would be used.

Statistics: Posted by ppslim — Wed Dec 18, 2002 4:06 am

Re: Missed the point

2002-12-17T21:19:27-04:00

Banning the encoded host...as you say...will work as long as they are connected, but what about the next time they connect and you want them to be time or perm banned from a channel? Banning the encoded host is futile if you want a ban of this type. All it does is fill your akill list with useless bans.

you dont understand... each host is encoded into one and only one encoded host. even if a client reconnects, it will still get the same encoded host, as long as the client reconnects with the same host. if the host changes, then a broader ban mask will be necessary, but no more necessary than it would be had the "host encoding" feature not been used.

Statistics: Posted by Guest — Tue Dec 17, 2002 9:19 pm

Does a ban tcl exist that works correctly on Unreal IRCD?

2002-12-17T05:09:21-04:00

Then there simply is no ban you can palce that will prevent this.

The idea behind hostmasking, is to prevent DDOS attacks. The only way to fully impliment this protection, is to remove all means of obtaining the true details, unless your admin.

So with one hand you ask for a method of banning these users, and in the other, you are saying this fills your banlist.

This is the only current way.

The best ban you can place is *!*user@*.host.com

This will capture them most times, until they finaly figure to change there ident.

Back when I was a lad on IRC, I used to go around channels, having a contest, to see how many channels I coul get banned from in 1 hour, or how quick I could fill a channels ban list.

In the end, the only way to get rid of my, was to ban my ISP.

The same applies here, the only way you will prevent them coming back, is if you place strong enough bans, that you block a sized portion of the internet.

You ca only have it one way or the other.

Statistics: Posted by ppslim — Tue Dec 17, 2002 5:09 am

Missed the point

2002-12-17T00:06:00-04:00

Banning the encoded host...as you say...will work as long as they are connected, but what about the next time they connect and you want them to be time or perm banned from a channel? Banning the encoded host is futile if you want a ban of this type. All it does is fill your akill list with useless bans.

Statistics: Posted by Guest — Tue Dec 17, 2002 12:06 am

Does a ban tcl exist that works correctly on Unreal IRCD?

2002-12-14T23:02:29-04:00

uhh unreal crc32's the first part of the host to prevent the very problem you are describing. every unique host has one and only one masked counterpart, likewise for IP addresses. IPs, on the other hand, have a slightly crazier encryption algorithm, as to complicate brute forcing a bit. banning the encoded host should solve your problems.

Statistics: Posted by Guest — Sat Dec 14, 2002 11:02 pm

More info on the Unreal banmask

2002-12-13T12:19:07-04:00

Sorry about the ambiguity. Unreal now uses a banmask. The syntax for a verbose ip...ie: user-10.bbd14tcl.dsl.pol.co.uk shows up on Unreal as Achat-3D35C82E.bbd14tcl.dsl.pol.co.uk. The banmask for numeric ip's...ie: 61.18.139.51 shows up as 164FA2B8.1BA0D84D.3A81B54A.IP. The "Achat" is a changeable prefix that is chosen by each individual network and is defined in the Unreal config file. The only consistant thing is that each encoded part of the ip contains 8 characters. This banmask also changes each time a user connects. It's great to stop attacks on users, but is lousy for setting bans.

The only ways I can see to make a ban work would either be a nick ban (which is a waste) or a modified type 3 ban where the tcl would parse out the encoding and leave the un-encoded part of a verbose ip. In the case of a numeric ip, your guess is as good as mine. The only thing that comes to mind is a custom ban that would be in the format *!*user@*....which is also a lousy banset.

Maybe a banset that stores the realname somewhere, then checks the username and realname onjoion and then compares that to an already set ban, updating with a new ban as needed???

I'm at a loss.....

Statistics: Posted by Guest — Fri Dec 13, 2002 12:19 pm

Does a ban tcl exist that works correctly on Unreal IRCD?

2002-12-12T15:08:30-04:00

NOt all of us use unreal IRCD, so it may help to enlighten us about this NEW ban.

Statistics: Posted by ppslim — Thu Dec 12, 2002 3:08 pm

Does a ban tcl exist that works correctly on Unreal IRCD?

2002-12-12T12:44:34-04:00

I am looking for a ban tcl or help coding a tcl that will set correct bans on the Unreal IRCD. With the new banmasks used, it is a real pain to constantly modify incorrectly set bans. HELP!

Statistics: Posted by Guest — Thu Dec 12, 2002 12:44 pm