What Needs to be Changed to Restrict Access to the Gateway

• Change the last line of the code starting at row 4761 of client.c to whatever restrictions you like.

if(remote &&

strncmp(remote,"127.",4) &&

strncmp(remote,"10.",3) &&

strncmp(remote,"192.168",7) &&

(strncmp(remote,"172.",4) ||

strncmp(remote+4,"16",2)<0 ||

strncmp("31",remote+4,2)<0) &&

strncmp(remote,"130.89.3",7)) {

^^^^^^^^

• You probably also need to set your netmask and your domain. Change around line 3309 of util.c the line bc=... :

if(WWW) {

bc=(unsigned long)((130+89*256)+(unsigned long)(255*256+220)*65536);

if_bcast->s_addr = bc;

} else if_bcast->s_addr = htonl(bc);

The broadcast is here set to 130.89.220.255.

• You also may want to change the default domain name. Around line 3976 of client.c (I didn't find this one?) :

if (failed) {

// Check if host.student.utwente.nl exists...

sprintf(namebuf,"%s.student.utwente.nl",host);

hst=gethostbyname(namebuf);

if(hst) {

putip((char *)&dest_ip,hst->h_addr_list[0]);

failed = False;

}

}

Change "%s.student.utwente.nl" to whatever domain you want.