I have't been able to access Undernet server since the last three months.
It is because of some irc worm virus, I think

When I try to access Undernet sever using mIRC program, the following messages show up
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Welcome to the ROXnet IRC Network nurema!nurema@203.230.37.238
Your host is irc-2.test.com, running version Unreal3.2.3
This server was created Wed Aug 31 2005 at 00:01:04 KST
irc-2.test.com Unreal3.2.3 iowghraAsORTVSxNCWqBzvdHtGp lvhopsmntikrRcaqOALQbSeIKVfMCuzNTGj
CMDS=KNOCK,MAP,DCCALLOW,USERIP SAFELIST HCN MAXCHANNELS=100 CHANLIMIT=#:100 MAXLIST=b:60,e:60,I:60 NICKLEN=30 CHANNELLEN=32 TOPICLEN=307 KICKLEN=307 AWAYLEN=307 MAXTARGETS=20 WALLCHOPS are supported by this server
WATCH=128 SILENCE=15 MODES=12 CHANTYPES=# PREFIX=(qaohv)~&@%+ CHANMODES=beI,kfL,lj,psmntirRcOAQKVGCuzNSMTG NETWORK=ROXnet CASEMAPPING=ascii EXTBAN=~,cqnr ELIST=MNUCT STATUSMSG=~&@%+ EXCEPTS INVEX are supported by this server
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There are 3537 users and 27895 invisible on 3 servers
101 unknown connection(s)
3059 channels formed
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Local host: k406ksh.KINS (203.230.37.238)
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I have 10247 clients and 0 servers
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Current Local Users: 10247 Max: 25754
Current Global Users: 31432 Max: 79680
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MOTD File is missing
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* nurema sets mode: +iwx
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How can I get over this problem? I need your help. Please~~~~

That is not Undernet. Besides, I don't see any 'error message' and you connect without any problem.

The undernet server list is HERE